Frequently asked questions

Yes. Every converter and tool on the site is completely free, with no sign-up required.

We use exact, internationally-defined conversion factors and high-precision arithmetic, so results are accurate to many decimal places.

No. Conversions happen instantly and are not tied to your identity. We only keep anonymous popularity counts to surface trending conversions.

Absolutely. The site is mobile-first and works in any modern browser, including dark mode.

Exchange rates refresh automatically every hour from a live provider, with the last-known rates used as a fallback.

There are exactly 2.54 centimeters in one inch.

Multiply the number of miles by 1.609344 to get kilometers.

Rates are refreshed hourly. For high-stakes transactions, always confirm with your bank or a live market source.

One pound equals 453.59237 grams.

Mass is the amount of matter in an object; weight is the force gravity exerts on that mass. Everyday “weight” conversions actually convert mass.

Multiply the Celsius value by 9/5 and add 32. For example, 20°C = 68°F.

Absolute zero is 0 Kelvin, equal to -273.15°C or -459.67°F — the lowest possible temperature.

A kilobyte (KB) is 1,000 bytes (decimal), while a kibibyte (KiB) is 1,024 bytes (binary). We support both.