About HowToConvert

HowToConvert exists to make everyday measurement conversions instant, free and reliable. Whether you are cooking with a metric recipe, comparing fuel economy across regions, or sizing a hard drive, you should be able to trust the answer without second-guessing it.

We deliberately keep the tools clean and ad-light so the converter you came for loads instantly and works on any device, with no sign-up and no tracking of your inputs, every calculation runs directly in your browser.

Our converters are not guesswork. Each one is built on internationally defined relationships, for example, one inch is exactly 2.54 cm and one pound is exactly 0.45359237 kg. Every value is referenced to its SI base unit (meter, kilogram, second, kelvin) so results stay consistent across every unit pair.

Conversions that involve scales rather than simple factors, such as temperature, or fuel economy where units are inversely related, use the correct formulas, not approximations. We document the formulas and edge cases on each category page so you can verify the result yourself.

HowToConvert is an independent project maintained by a small team with backgrounds in engineering and web development. We use these tools ourselves daily, which is exactly why we obsess over accuracy and speed.

Spotted a value that looks wrong, or need a unit we do not yet support? We genuinely want to hear about it, get in touch via our contact page and we will respond.