Free tools
Free measuring tools
Five small tools that run in your browser, free and with nothing to install: convert lengths between feet, inches and metric, work out a room’s square footage, convert ring sizes or print a ring sizer, use a real-size ruler on your screen, and convert roof pitch to degrees and percent. Nothing you type is sent anywhere.
Length converter: feet, inches, metres
Feet, inches and fractions to mm, cm and metres, and back
Open the tool →Square footage calculator
Add up rooms and L-shapes in square feet and square metres
Open the tool →Ring size chart & converter
US, UK, EU and Japan sizes, plus a printable sizer
Open the tool →Online ruler, actual size
A real-size ruler on your screen, set with a bank card
Open the tool →Roof pitch & slope calculator
Convert pitch, degrees, percent grade and rise over run
Open the tool →