About Workbench

Workbench is a small set of calculators and converters, built on the idea that a tool for a quick number shouldn't ask for an account, a download, or your attention for longer than it takes to get an answer.

Each instrument on this site does one job. Type a value, get a result, move on. There's no data saved between visits and nothing to configure.

What's here

• Percentage calculator — percentages, percent change, and reverse percentages
• Tip calculator — bill splitting with a live tip and per-person total
• Length converter — metric and imperial units, converted together
• Age calculator — the exact time between two dates
• Discount calculator — sale price and savings from an original price and percentage off
• BMI calculator — Body Mass Index from height and weight
• Loan payment calculator — monthly payment and total interest on a loan or mortgage
• Compound interest calculator — how a lump sum grows over time
• Temperature converter — Celsius, Fahrenheit, and Kelvin, linked live

Get in touch

Found something wrong with a calculation, or want a tool that isn't here yet? Contact hello@example.com.