Your #1 source for free, fast, and accurate online calculators.

Calculate your exact age in years, months, days, hours, and minutes with our precise age calculator

Calculate date differences, add or subtract days, weeks, months, and years from any date

Calculate percentages, percentage increase, decrease, and percentage of a number

Add, subtract, and convert time in hours, minutes, and seconds

Calculate days between dates, add or subtract days from a specific date

Calculate hours between times, add or subtract hours, and convert time formats

Add, subtract, multiply, divide fractions and convert between fractions and decimals

Calculate grades, GPA, weighted grades, and letter grades from percentages

Calculate subnet masks, network addresses, broadcast addresses, and IP ranges

Free online scientific calculator with trigonometric, logarithmic, and advanced math functions

Calculate fuel costs, consumption, and cost per distance for any trip

Calculate your Grade Point Average (GPA) with weighted courses using the standard 4.0 scale

Calculate days, hours, minutes, and seconds until any date or event

Solve proportions, simplify ratios, and find equivalent ratios with step-by-step solutions

Calculate standard deviation, variance, mean, median, mode, and range from your data set with steps

Calculate area for rectangles, circles, triangles, and trapezoids with unit conversions

Calculate square roots, cube roots, and nth roots with step-by-step solutions

Convert centimeters to inches and inches to centimeters with height conversion charts and formulas

Convert kilograms to pounds and pounds to kilograms with weight conversion charts and formulas

Convert Celsius to Fahrenheit and Fahrenheit to Celsius with Kelvin support and temperature charts

Calculate lottery jackpot odds and prize tier probabilities for Powerball, Mega Millions, and custom formats