Free measurement tools. No sign up, nothing to install, and they work on a phone.
Size Comparison Finder
Enter a measurement and see everyday objects that match it. Or search for an object and read its exact size.
Universal Length Converter
Convert between millimetres, centimetres, metres, kilometres, inches, feet, yards and miles. Fractions welcome.
Acreage Converter and Land Area Calculator
Convert acres, square feet, hectares and square metres. Measure a plot from its dimensions and compare it to places you know.