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All Category Suites Finance Health Math Geometry Education Construction Converters Time & Date Business Statistics Islamic Finance Calculate Sharia-compliant Zakat on gold bullion, coins, and women's jewelry with karat purity conversions (24K, 22K, 21K, 18K, 14K), gemstone deductions, and Madhhab rulings.
Calculate Islamic agricultural harvest Zakat (Ushr) on crops, grains, dates, and produce with 10% rain-fed vs 5% artificial irrigation rates, 5 Wasqs Nisab, and expense deductions.
Calculate Sharia-compliant returns on Sukuk (Islamic investment certificates): rental coupon distributions, equivalent Yield to Maturity (YTM), and clean vs dirty pricing.
Calculate Sharia-compliant vehicle financing using Murabaha (Cost-Plus Sale) and Ijarah wa Iqtina (Auto Lease-to-Own) with monthly installments, fixed markups, and no Riba.
Calculate Sharia-compliant personal cash financing via Commodity Murabaha (Tawarruq Munazzam) with monthly installments, flat vs reducing rates, and Debt-to-Burden ratios.
Calculate monthly mortgage payment savings, total lifetime interest savings, and break-even month timeline when refinancing your mortgage or loan.
Project tax-free compound growth, future retirement net worth, and annual tax savings of a Roth IRA account based on age and contribution rate.
Calculate how extra monthly, annual, or lump-sum principal payments shorten your mortgage loan term and reduce total interest expenses.
Calculate your target FIRE net worth, required annual savings rate, and exact timeline to achieve financial independence using safe withdrawal rules.
Calculate monthly student loan payments, total interest across standard vs extended repayment plans, and savings from extra payoff contributions.
Calculate your unweighted (4.0 scale) and weighted (5.0 scale) high school GPA. Supports AP (+1.0), IB (+1.0), Honors (+0.5), Dual Enrollment (+1.0), and Regular courses with credit hours and letter grade conversion.
Calculate total 4-year college tuition, room and board, fees, books, and living expenses. Deduct financial aid, scholarships, grants, and work-study to determine your exact net price and annual funding gap.
Calculate the exact time required to read any book, article, research paper, or textbook based on word count, page count, and your personal reading speed in words per minute (WPM).
Calculate curved exam and assignment grades using standard academic curve methods: Flat Point Boost, Linear Scaling to 100%, Square Root Curve, and Bell Curve (Standard Deviation / Z-Score).
Calculate the return on investment (ROI) of a university degree or vocational program. Compares total college investment and opportunity cost of lost wages against lifetime career earnings premium and break-even years.
Calculate Sharia-compliant home financing payments using Diminishing Musharakah (Co-Ownership & Rental Buyout), Murabaha (Cost-Plus Markup), and Ijara (Lease-to-Own) models.
Calculate Sharia-compliant Zakat on rental properties, commercial real estate, land held for trading or development, and understand personal home exemptions.
Screen stocks for Sharia compliance using AAOIFI & MSCI financial ratios, and calculate exact dividend and capital gain purification (Tathir) donation amounts.
Calculate Islamic expiation payments for missed Ramadan fasts (Fidya for chronic illness/elderly) and Kaffarah for deliberately broken fasts or broken oaths.
Calculate Sharia-compliant profit-and-loss sharing ratios for Mudarabah (Trustee Venture) and Musharakah (Joint Equity Partnership) business contracts.
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Solve percentage problems instantly. Perfect for finding percentages, percentage changes, increases, decreases, fractions, and percentage differences.
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Add, subtract, multiply, and divide fractions easily. Supports mixed numbers, improper fractions, proper fractions, and simplifies results to the lowest terms.
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An advanced multi-function scientific calculator. Supports standard arithmetic, trigonometry, log functions, exponentiations, roots, and physical constants with active memory logs.
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Solve, simplify, or compare ratios. Easily find equivalent ratios, scale proportions up or down, and divide quantities into specific ratio groups.
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Calculate average statistics for any dataset. Compute the arithmetic mean, median, mode, range, geometric mean, and standard deviation with detailed step explanations.
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Calculate numbers raised to any power. Solves negative exponents, fractional exponents, large powers, and displays full algebraic expansions.
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Solve logarithms instantly. Supports natural logarithms (ln), common logarithms (log base 10), binary logarithms (log base 2), and any custom base.
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Find the square root of any number. Quickly calculate roots, simplifies radicals, identifies perfect squares, and provides step-by-step estimations.
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Calculate the cube root of any number. Supports positive and negative values, identifies perfect cubes, simplifies cube radicals, and provides step-by-step mathematical breakdowns.
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A comprehensive decimals tool. Add, subtract, multiply, and divide decimals with full long division working, or convert decimals to simplified fractions and percentages.
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Perform matrix arithmetic operations including matrix addition, subtraction, multiplication, and transpose for 2x2 and 3x3 matrices with step-by-step matrix calculations.
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Find the determinant of 2x2 and 3x3 square matrices with a clear explanation of cofactor expansion and the Leibniz formula.
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Solve quadratic equations of the form ax² + bx + c = 0. Supports real and complex imaginary roots, with full step-by-step discriminant details.
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Solve single variable linear equations (ax + b = c) and systems of two linear equations in two variables (ax + by = c, dx + ey = f) using algebraic steps.
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Perform polynomial arithmetic (addition, subtraction, and multiplication) up to degree 3 or evaluate a single polynomial at a given value of x with step-by-step synthetic substitution.
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Calculate the factorial of any non-negative integer (n!). Supports exact integer factorials, scientific notation for larger numbers, and Stirling's approximation.
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Check if any number is prime, view its divisors, find the prime factorization (factor tree), and generate nearby prime numbers.
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Find the Greatest Common Factor (GCF / GCD) of two or three numbers using the Euclidean algorithm, prime factorization, or list of common divisors.
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Find the Least Common Multiple (LCM) of two or three numbers with clear mathematical steps, prime factorization listing, and multiples comparisons.
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Simplify radical terms (square root, cube root, or any arbitrary index) and convert radicals to rational exponent fractions with complete simplifying factors breakdown.
Calculate your Body Mass Index (BMI). BMI is an indirect assessment of body fat composition used by medical and academic institutes to establish weight health categories.
Calculate your Basal Metabolic Rate (BMR) using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas. BMR is the baseline number of calories your body burns at rest to survive.
Estimate your Total Daily Energy Expenditure (TDEE). Learn exactly how many calories you burn per day based on your age, gender, height, weight, and weekly activity levels.
Calculate your body fat percentage using the U.S. Navy tape measure method. Compare body fat ranges, fat weight, and lean mass weights instantly.
Find the daily calories you need to lose weight, maintain weight, or gain weight. Optimize calorie deficit and surplus targets based on your goals.
Calculate your recommended daily protein intake in grams. Optimize protein metrics based on weight-lifting, athletic performance, and body goals.
Calculate your optimal daily water intake. Find your baseline hydration target, adjusted for physical activity and weather conditions.
Calculate your ideal body weight range based on standard clinical equations (Devine, Robinson, Miller, and Hamwi) and healthy BMI parameters.
Calculate your Lean Body Mass (LBM) using the Boer, James, and Hume formulas. Find your exact body composition of muscle and fat weight.
Calculate your daily macronutrient needs (carbohydrates, protein, and fats) in grams based on your calorie target, activity level, and weight management goal.
Calculate your semester or cumulative GPA (Grade Point Average) for weighted and unweighted scales. Supports custom credit weightings and course difficulty honors/AP factors.
Calculate your Grade Point Average (GPA) for a single semester and model how it impacts your cumulative GPA over time.
Calculate exactly what score you need on your final exam to achieve your desired target grade in a course.
Convert numeric raw scores (points earned vs. total points) into percentages, letter grades, and GPA scale ratings.
Calculate your Cumulative Grade Point Average (CGPA) from semester-wise GPAs or multi-term course records. Supports CBSE percentage conversions.
Calculate your final class grade when assignments are grouped into weighted percentage categories (e.g., Homework 20%, Exams 50%, Quizzes 30%).
Quickly grade a quiz, test, or exam. Generates a full letter grade chart showing points, percentages, and grade bounds based on incorrect answers.
Calculate average test scores or class grades. Generates statistical indicators including mean, median, standard deviation, and letter grade spreads.
Calculate your academic attendance rate and find out exactly how many days you must attend consecutively or can safely miss to meet school targets.
Optimize your academic schedule. Estimate the weekly out-of-class study hours needed based on credit load, course difficulty, and target grade goals.
Calculate the area, circumference, diameter, and radius of a circle. Input any single known value to instantly compute all other properties with step-by-step mathematical breakdowns.
Solve any triangle using side lengths, angles, or base & height. Supports SSS, SAS, ASA, and Base-Height formulas to calculate area, perimeter, angles, semi-perimeter, and altitudes.
Calculate the area, perimeter, and diagonal length of a rectangle given its length and width. Easy to use with real-world examples and step-by-step calculations.
Calculate the area, perimeter, diagonal, and side length of a square. Enter any single known property to instantly solve for all other measurements.
Calculate the area, perimeter, heights, base lengths, and diagonals of a trapezoid (trapezium) with input parameters. Supports isosceles and general trapezoids.
Calculate the volume, surface area, radius, and diameter of any sphere. Input any single known parameter to solve for all others with precise formulas.
Calculate the volume, lateral surface area, total surface area, and base area of a right circular cylinder. Simply enter the radius and height.
Calculate the volume, surface area, base area, lateral area, and slant height of a right circular cone given its base radius and height.
Calculate the volume, total surface area, face diagonal, and space diagonal of a cube. Enter any one known property to instantly solve for all other cube dimensions.
Calculate the volume, lateral surface area, base area, base perimeter, and total surface area of rectangular, triangular, and regular polygonal prisms.
Calculate the volume, total surface area, lateral surface area, slant height, and base area of square, rectangular, and regular triangular right pyramids step by step.
Calculate the area, perimeter, side length, diagonals, altitude, and inscribed circle radius (inradius) of a rhombus using perpendicular diagonals, side and height, or side and angle.
Calculate side length, apothem (inradius), circumradius, area, perimeter, interior angles, and exterior angles for any regular polygon (n = 3 to 100).
Compute the 2D area, Ramanujan perimeter approximation, linear eccentricity (focal distance), orbital eccentricity, and semi-latus rectum of an ellipse.
Calculate arc length, sector area, circular segment area, chord length, sagitta (arch height), and sector perimeter for any circle radius and central angle.
Calculate your exact age in years, months, weeks, days, hours, minutes, and seconds from your date of birth. Find out the remaining days to your next birthday.
Calculate the exact number of days, weeks, months, and years between any two calendar dates.
Calculate the number of business (working) days between two dates, or add/subtract business days to find a target deadline.
Add, subtract, or find the absolute duration between specific hours, minutes, and seconds.
Track the exact time remaining until an event, holiday, or target date-time with a live-updating timer.
Convert clock times between different global locations and schedule meetings across multiple time zones easily.
Calculate total hours worked for timesheets, including custom lunch breaks, start/end times, and total weekly payroll earnings.
Add or subtract fractional or decimal hours, minutes, and seconds, and convert hours into other units of time.
Find the week number of any date, calculate the start/end dates of a week, or add/subtract weeks from a date.
Count down or up to any day. Add or subtract calendar days to find a specific past or future target date.
Convert centimeters to feet instantly. Explore the formula, see a real-world conversion table, and understand how the metric system relates to imperial feet.
Convert feet to centimeters instantly. Look up conversion tables, learn the mathematical formula, and master imperial-to-metric calculations.
Convert kilograms to pounds (lbs) instantly. Access conversion scales, view step-by-step math, and convert weights easily.
Convert pounds to kilograms instantly. Check formulas, look up quick-reference weights, and convert mass units.
Convert Celsius to Fahrenheit instantly. Learn the calculation steps, inspect the conversion grid, and check temperature reference markers.
Convert Fahrenheit to Celsius instantly. Look up thermodynamic formulas, temperature tables, and check weather or medical values.
Convert kilometers to miles instantly. Track highway speeds, run distances, or geographic map measurements using our live calculator.
Convert miles to kilometers instantly. Learn formulas, browse standard road conversion tables, and complete quick geographic distance conversions.
Convert liters to US liquid gallons instantly. Ideal for fuel, kitchen liquid volumes, and swimming pool capacities.
Convert US liquid gallons to liters instantly. Check out exact liquid volume math and standard metric conversion tables.
Convert inches to centimeters instantly. Look up exact measurement values, use our tool for home improvements, sizing charts, and engineering.
Convert centimeters to inches instantly. Access standard scale charts and convert heights, screen sizes, or garment sizes instantly.
Convert meters to feet instantly. View detailed height or altitude tables and check formulas for engineering and building layouts.
Convert feet to meters instantly. Check formulas, view height standards, and perform scientific or construction conversions.
Convert square feet (sq ft) to square meters (sq m) instantly. Crucial for real estate properties, tiling layouts, and apartment rentals.
Convert square meters (sq m) to square feet (sq ft) instantly. Ideal for global home plans, land parcels, and real estate listings.
Convert PSI (pounds per square inch) to bar pressure instantly. Essential for checking tire pressure, scuba tanks, and compressor settings.
Convert bar pressure to PSI instantly. Explore pressure relationships and convert metric standards to imperial values easily.
Convert miles per hour (mph) to kilometers per hour (km/h) instantly. Ideal for comparing dashboard speeds, travel maps, and wind velocities.
Convert kilometers per hour (km/h) to miles per hour (mph) instantly. Perfect for road trips, vehicle speeds, and cycling logs.
Calculate gross profit margin, net profit margin, markup percentage, and total profit based on revenue and cost of goods sold (COGS). Perfect for pricing strategies.
Calculate product markup percentage, selling price, and gross profit based on unit cost. Solve for any missing variable to optimize pricing.
Determine sales price, net savings, and final costs after applying promotional percentage discounts and stacked coupons. Shop smarter and calculate markdowns instantly.
Calculate total retail sales tax, inclusive and exclusive prices, and tax rates. Perfect for consumers, sellers, and cash registers in any municipality.
Add or extract Value Added Tax (VAT) dynamically using standard European, UK, or custom tax rates. Toggle instantly between tax-inclusive and tax-exclusive calculations.
Calculate professional commission earnings, payout percentages, split commission hierarchies, and base salaries. Ideal for sales representatives, real estate agents, and recruiters.
Find your break-even point in units sold and sales revenue. Input your fixed overhead costs, unit selling price, and unit variable cost to understand your business feasibility threshold.
Convert a salary between hourly, daily, weekly, biweekly, monthly, and annual equivalents. Compare pay rates with custom working hours and vacation weeks.
Determine gross wages, federal and state withholdings, payroll taxes (FICA), retirement contributions, and final net take-home pay for salaried or hourly employees.
Generate itemized billing breakdowns instantly. Input multiple service lines or products, apply individual discounts, add sales tax, and print a professional subtotal ledger.
Calculate the arithmetic mean, geometric mean, and harmonic mean of a dataset. See step-by-step calculations and visual formulas.
Find the median or exact middle value of any dataset. Learn how to compute the median for both even and odd count lists with worked steps.
Find the mode or most frequently occurring values in your dataset. Supports unimodal, bimodal, multimodal, and no-mode datasets.
Calculate population and sample standard deviation step-by-step. Get individual squared deviations, variance, mean, and range breakdown.
Calculate sample and population variance online. See the step-by-step squared deviations, mean, and standard deviation outputs.
Calculate single-event, multi-event, independent, and dependent probabilities. Evaluate union (A or B), intersection (A and B), and conditional likelihoods.
Calculate permutations P(n, r) with or without repetition. Get step-by-step factorial expansions and mathematical solutions.
Calculate combinations C(n, r) or binomial coefficients. Learn how to compute selections where order does not matter, with full factorials.
Calculate standard Z-scores and find corresponding percentage ranks or normal distribution probabilities step-by-step.
Determine confidence intervals for sample means. Enter mean, sample size, standard deviation, and select confidence levels (90%, 95%, 99%).
Calculate monthly car payments, total interest costs, and overall vehicle purchase expenses including trade-in value and sales tax.
Project your retirement savings nest egg balance at retirement age based on salary, annual contribution rate, employer match, and market return rate.
Calculate your exact debt freedom timeline and total interest saved using Debt Avalanche or Debt Snowball strategies.
Compare the total financial cost of renting a home versus buying a home over any time horizon.
Calculate how inflation reduces purchasing power over time or estimate equivalent prices across years.
Quickly calculate restaurant tip percentages, total bill amount, and split charges per person.
Calculate appliance electricity consumption in kilowatt-hours (kWh) and estimate daily, monthly, and annual utility costs.
Calculate fuel needed and total gas cost for road trips based on distance, vehicle MPG, and fuel price.
Calculate your peak fertile window and expected ovulation date based on menstrual cycle length.
Calculate estimated baby delivery due date, conception timeframe, and gestational age using Naegele’s Rule.
Calculate running or walking pace per mile or kilometer, total race time, or distance for 5K, 10K, half marathon, and marathon.
Determine optimal aerobic, fat-burning, and peak cardio heart rate training zones based on age and resting heart rate.
Estimate maximum weight you can lift for a single rep in bench press, squat, or deadlift using Epley and Brzycki formulas.
Calculate total human body surface area in square meters (m²) using Mosteller, DuBois, and Haycock formulas.
Solve missing side lengths a, b, or hypotenuse c of right triangles using a² + b² = c² with step-by-step radicals.
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Find slope m, angle of inclination, midpoint, and distance between two coordinate points (x1, y1) and (x2, y2).
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Convert numbers to scientific or engineering notation (a × 10^b) and perform arithmetic multiplication and division.
Calculate the Standard Error of the Mean (SE) for sample data to measure sampling precision and variation.
Convert dog age to human years accurately based on breed weight classification (small, medium, large, giant).
Calculate optimal wake-up times and bedtimes aligned with natural 90-minute REM sleep cycles to wake up refreshed.
Calculate your annual Zakat obligation accurately across gold, silver, cash, investments, stocks, and business assets using Nisab thresholds.
Determine your total Ramadan Zakat al-Fitr obligation for yourself and family dependents in local currency or staple food weights.
Calculate primary Quranic inheritance shares (Mirath / Fara'id) for estate distribution among surviving spouse, children, and parents according to Islamic jurisprudence.
Convert dates between the Islamic Lunar Hijri calendar (AH) and the Gregorian Solar calendar (CE) with astronomical calculations and moon sighting adjustments.
Estimate your monthly home mortgage payments. Enter home value, down payment, loan term, and interest rate to see the principal, interest, taxes, and amortization values.
Calculate the volume of concrete needed for slabs, walls, footings, columns, or tubes, and estimate the number of standard concrete bags required with adjustable safety margins.
Estimate the gallons of paint needed for a room, walls, or ceiling based on custom room dimensions, doors, windows, and planned coats of paint.
Calculate the total number of floor or wall tiles needed for an area including grout joint sizes and adjustable waste buffers.
Estimate materials and total costs for flooring projects including hardwood planks, laminate boxes, carpet rolls, or vinyl tiles.
Calculate the total roof surface area, roofing squares, shingle bundles, and underlayment rolls needed based on roof footprint and pitch.
Calculate the number of bricks and bags of mortar mix required for a single or double-course brick wall of any size.
Estimate the volume in cubic yards and total weight in tons of gravel, sand, or crushed stone needed for driveways, pathways, or landscaping beds.
Calculate the total volume, surface area, and tons of hot-mix asphalt (HMA) required to pave driveways, parking lots, or roadways.
Calculate the number of drywall sheets, joint compound tubs, screws, and tape rolls required to complete a room or custom wall/ceiling layout.
Calculate the total cubic yards or standard bag count of landscaping mulch, soil, or compost needed to cover garden beds at a specific depth.
See how interest on your interest can grow your wealth. Input initial deposits, monthly contributions, annual rates, and tax parameters to chart your compounding future.
Determine your monthly loan payments, interest costs, and amortization details. Ideal for auto loans, personal loans, and simple installment loans.
Calculate simple interest earnings or loan charges using standard rate formulas. Find out how much interest accrues over days, months, or years.
Estimate the future growth of your savings account. Plan your savings goals and see how compounding interest makes your regular deposits grow.
Project the growth of your investment portfolio over time. Estimate future wealth based on initial capital, recurring contributions, and expected annual return rates.
Calculate CD maturity values, compound interest earnings, and annual percentage yields (APY). Compare different deposit terms to maximize your interest.
Determine the true Annual Percentage Yield (APY) for a nominal interest rate compounded at different intervals (daily, monthly, quarterly, or annually).
Calculate the true Annual Percentage Rate (APR) of a loan. Include lender fees, closing costs, and interest rates to reveal the true cost of credit.
Calculate the Return on Investment (ROI), annualized ROI, and net profit margins to measure the efficiency and profitability of your financial investments.
Convert weights, measures, distances, and areas globally.
Get live conversion indicators for major world currencies.
Convert numbers between base-2, base-10, and hexadecimal.