Free Online Calculators
Fast, accurate, and easy-to-use calculators and unit converters for everyday life. No sign-up required.
General
Percentage Calculator
Calculate percentages, find what percent one number is of another.
Percentage Change
Calculate the percentage increase or decrease between two values.
Discount Calculator
Find the discounted price and savings on any item.
Tip Calculator
Calculate tip amounts and total bill with optional split.
Split Bill Calculator
Split a bill evenly among a group of people.
Age Calculator
Calculate your exact age in years, months, and days.
Date Difference
Calculate the exact number of days, months, and years between two dates.
Time Calculator
Add, subtract, and convert between hours, minutes, and seconds.
Finance
Profit Calculator
Calculate profit, profit margin, and profit percentage.
Markup Calculator
Calculate selling price from cost and markup percentage.
Margin Calculator
Calculate gross margin and profit margin from selling price and cost.
Break-Even Calculator
Calculate the break-even point in units and revenue.
Savings Calculator
Calculate future value of savings with compound interest.
Loan Payment Calculator
Calculate monthly loan payments, total cost, and interest.
Conversions
Length Converter
Convert between meters, feet, inches, miles, and more.
Weight Converter
Convert between kilograms, pounds, ounces, and more.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Area Converter
Convert between square meters, acres, hectares, and more.
Volume Converter
Convert between liters, gallons, cups, and more.
Speed Converter
Convert between km/h, mph, m/s, and knots.
Time Converter
Convert between seconds, minutes, hours, days, and weeks.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes, and more.