Calculators Tools

Perform basic arithmetic operations — addition, subtraction, multiplication, and division — with adjustable decimal precision. Fast, simple, and accurate.

Solve 5 types of percentage problems: what is X% of Y, X is what % of Y, percentage change, percentage increase, and percentage of total.

Add, subtract, multiply, and divide fractions and mixed numbers. Shows the step-by-step solution and simplifies the result to its lowest terms automatically.

Calculate the mean (arithmetic average) of any list of numbers. Enter values separated by commas or on separate lines for instant results.

Calculate logarithms in any base — including log base 10, natural log (ln), and log base 2. Enter the value and base for an instant result.

Calculate any number raised to any power (exponent). Handles positive, negative, decimal, and fractional exponents with full precision for math and science.

Calculate the factorial (n!) of any non-negative integer. Supports large numbers up to several hundred digits for combinatorics and probability problems.

Perform arithmetic with arbitrarily large integers that exceed JavaScript number limits. Perfect for cryptography, competitive programming, and science calculations.

Calculate your exact age in years, months, and days with birthday countdown.

Calculate your BMR and daily calorie needs using the Mifflin-St Jeor equation.

Calculate discount amount, final price, and savings instantly.

Calculate profit margin, markup percentage, and selling price from cost.

Add sales tax to a price or extract tax from a tax-inclusive price.

Calculate your Total Daily Energy Expenditure and macronutrient targets.

Convert between units of length, weight, temperature, volume, and more

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles and more

Convert between milligrams, grams, kilograms, pounds, ounces, stones and metric/imperial tons

Convert between Celsius, Fahrenheit, Kelvin and Rankine temperature scales

Convert between milliliters, liters, gallons, cups, pints, quarts and cubic units

Convert between square meters, square feet, acres, hectares and more area units

Convert between mph, km/h, m/s, knots, and Mach speed units

Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes and petabytes

Convert between PSI, bar, pascal, atmosphere, mmHg and other pressure units

Convert between joules, calories, kilocalories, kWh, BTU and other energy units

Convert between nanoseconds, milliseconds, seconds, minutes, hours, days, weeks, months and years

Convert between MPG (US/UK), L/100km, and km/L fuel efficiency units

Convert between Hertz, kilohertz, megahertz, gigahertz and RPM

Convert between degrees, radians, gradians, turns, arcminutes and arcseconds

Convert between Newtons, pound-force, kilogram-force, dyne and other force units

Convert between watts, kilowatts, megawatts, horsepower and BTU per hour

Convert between cups, tablespoons, teaspoons, fluid ounces, milliliters and liters for recipes