About Utiio
Utiio is a free toolkit of calculators, converters, and everyday utilities — built to give you instant answers without clutter, accounts, or uploads.
What we build
From percentage and mortgage maths to time zones, DIY quantities, developer utilities, and health estimates — each tool is designed to be fast, readable, and useful the first time you open it.
Privacy by default
Most tools run in your browser. The numbers and text you enter are processed locally and are not uploaded to calculate a result. See our Privacy Policy for details on analytics and advertising.
Suggest the next tool
Missing something? Suggest a tool and help shape what we build next.