Units, currency, time & numbers

Enter a width or height with a target aspect ratio and instantly get the matching dimension plus the simplified ratio.

Convert numbers between binary, octal, decimal and hexadecimal.

Encode any file or image to a Base64 data URI and decode a data URI back into a downloadable file.

Calculate your Body Mass Index from height and weight in metric or imperial units and see the matching WHO weight category instantly.

Convert a CSS length between px, rem, em, pt, %, vw and vh.

Convert between currencies using daily exchange rates.

Convert between bytes, KB, MB, GB, TB, PB and bits in decimal or binary mode.

Count the days, weeks, hours and the years, months and days between two dates, or add and subtract days, weeks, months or years from any date.

Calculate the final price after stacked discounts plus the amount saved, or split a bill with a tip across any number of people.

Estimate how much time is left and the total minutes to completion from how much work is done, the total amount, and the minutes elapsed so far.

Add a course per row with its credit hours and letter grade, then get your credit-weighted grade point average instantly.

Calculate future value, total interest and the effective annual yield (APY) for simple or compound interest with adjustable compounding frequency.