Calculate Anything. Fast. Accurate. Free.

Percentage Calculator

Find out what a percentage of a number is.

Percentage Change Calculator

Find the percentage increase or decrease between two values.

Average Calculator

Calculate the average — or weighted average — of up to four values.

Loan Calculator

Estimate your monthly payment on a fixed-rate loan.

Compound Interest Calculator

See how your savings grow with compound interest over time.

Simple Interest Calculator

Calculate interest earned without compounding.

Discount Calculator

Find the final price after a percentage discount.

Profit Margin Calculator

Calculate profit margin and markup from cost and selling price.

Break-Even Calculator

Find how many units you need to sell to cover your costs.

Tip Calculator

Calculate the tip and split the bill.

Future Value Calculator

Project how an investment grows with regular contributions.

Present Value Calculator

Find what a future amount of money is worth today.

CAGR Calculator

Calculate the compound annual growth rate of an investment.

Age Calculator

Calculate exact age in years, months, and days.

Date Difference Calculator

Find the number of days, weeks, or years between two dates.

Working Days Calculator

Count the business days between two dates.

BMI Calculator

Calculate your Body Mass Index from height and weight.

BMR Calculator

Estimate your Basal Metabolic Rate — the calories your body burns at rest.

TDEE / Calorie Calculator

Find your daily calorie needs to maintain, lose, or gain weight.

Body Fat Calculator

Estimate body fat percentage from tape-measure measurements (U.S. Navy method).

Ideal Weight Calculator

Estimate a reference body weight for your height (Devine formula).

Macro Calculator

Split your daily calories into protein, carb, and fat grams.

Protein Calculator

Estimate your daily protein target based on body weight and activity level.

Water Intake Calculator

Estimate how much water to drink daily based on your weight and activity.

Length Converter

Convert between millimeters, meters, feet, miles, and more.

Weight Converter

Convert between grams, kilograms, ounces, pounds, and more.

Area Converter

Convert between square meters, square feet, acres, hectares, and more.

Volume Converter

Convert between liters, gallons, cups, fluid ounces, and more.

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin.

Speed Converter

Convert between km/h, mph, knots, and more.

Time Converter

Convert between seconds, minutes, hours, days, and more.

Energy Converter

Convert between joules, calories, kilowatt-hours, BTU, and more.

Power Converter

Convert between watts, kilowatts, horsepower, and more.

Pressure Converter

Convert between pascals, bar, psi, atmospheres, and more.

Data Storage / File Size Converter

Convert between bits, bytes, KB, MB, GB, TB — including the 1000 vs. 1024 distinction.

Data Transfer / Bandwidth Converter

Convert internet speeds between Mbps, MB/s, Gbps, and more.

Fuel Economy Converter

Convert between MPG, L/100km, and km/L.

Frequency Converter

Convert between hertz, kilohertz, megahertz, and gigahertz.

Angle Converter

Convert between degrees, radians, and gradians.

Download / Upload Time Calculator

Estimate how long a file will take to download or upload at a given speed.

Concrete Calculator

Estimate concrete volume, cubic yards, and bags needed for a slab, footing, or column.

Fuel Cost Calculator

Calculate the total fuel cost for a trip from distance, consumption, and fuel price.

Hourly Rate Calculator

Calculate the hourly rate to charge as a freelancer, based on your income goal and expenses.

Mortgage Calculator

Estimate your monthly mortgage payment, including taxes, insurance, and PMI.

Credit Card Payoff Calculator

See how many months it will take to pay off a credit card balance, and the total interest paid.

Net Worth Calculator

Add up your assets and liabilities to calculate your total net worth.

Retirement Calculator

Project your retirement savings and estimate monthly retirement income.

ROI Calculator

Calculate the return on investment (ROI) and annualized ROI for an investment.

DCA Calculator

Compare dollar-cost averaging (investing a fixed amount regularly) against a lump-sum investment.

Fraction Calculator

Add, subtract, multiply, or divide two fractions and simplify the result.

GPA Calculator

Calculate your grade point average (GPA) from your courses' grades and credit hours.

Time Calculator

Add or subtract two durations given in hours, minutes, and seconds.

Time Zone Converter

Convert a specific date and time from one time zone to another, with accurate DST handling.

Calorie Deficit Calculator

Calculate the daily calorie deficit needed to reach a target weekly weight loss rate.

Pregnancy Due Date Calculator

Estimate your due date, gestational age, and conception date from your last menstrual period.

Sleep Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Currency Converter

Convert an amount from one currency to another using an exchange rate you provide.

Shoe Size Converter

Convert a US shoe size to EU and UK sizes, for men's or women's sizing.

Markup Calculator

Calculate the selling price for a product given its cost and a desired markup percentage.

VAT & Sales Tax Calculator

Add VAT or sales tax to an amount, or extract the tax portion from a tax-inclusive total.

Car Depreciation Calculator

Estimate how much a vehicle will be worth after a number of years.

Auto Loan Calculator

Estimate your monthly car loan payment from price, down payment, trade-in, and interest rate.

Tire Size Calculator

Compare the overall diameter of two tire sizes and estimate the resulting speedometer error.

Paint Calculator

Calculate how many liters (and cans) of paint you need for a wall.

Tile & Flooring Calculator

Calculate how many tiles and boxes you need to cover a room's floor, including a waste allowance.

IP Subnet Calculator

Calculate the network address, broadcast address, subnet mask, and usable host range for an IPv4 address.

Aspect Ratio Calculator

Calculate the simplified aspect ratio of a width and height, and scale to any target width.

RAID Calculator

Calculate the usable storage capacity and fault tolerance for a RAID array.