About OneAnswer

OneAnswer is a collection of free, instant-answer tools for the questions that billions of people search for every day — age calculators, currency converters, BMI calculators, timezone converters, and many more.

Our goal is simple: give you the answer in under 3 seconds, with no sign-up, no pop-ups, and no friction. Every tool is built to work on any device, load instantly, and give you accurate results.

This site is free to use and is supported by Google AdSense advertisements. We take your privacy seriously — we do not collect personal data, track your inputs, or share your information with third parties.

Built by a software engineer who wanted better, faster tools than what was available. If you have a tool suggestion, contact us.