Fast, accurate, no sign-up tools that run entirely in your browser. Pick a tool below to get started.
Find percentages, increases, decreases and ratios instantly.
Check your Body Mass Index using metric or imperial units.
Calculate exact age in years, months and days from any birth date.
Convert length, weight and temperature between metric and imperial.
Estimate monthly payments and total interest on any loan.
Count words, characters, sentences and reading time as you type.
Create strong, random passwords with custom length and rules.
Switch text between UPPERCASE, lowercase, Title Case and more.
Work out sale prices, savings and restaurant tips in seconds.
Find the exact number of days, weeks or months between two dates.
Generate random numbers in any range, with optional no-repeat mode.
Convert colors between HEX, RGB and HSL with a live preview.