Length & distance
Convert length, weight, temperature, volume, area, and speed with exact factors. Switch categories below; everything runs in your browser.
Conversions use the internationally defined exact relationships between units — the calculation keeps full precision and only the value shown to you is rounded. The reverse factor is shown alongside each result so you can sanity-check it.
Unit, temperature, and date conversions never leave your device. Currency uses a dated indicative snapshot that ships with the page, with an optional live lookup you trigger yourself.
Indicative FX · 2026-06-25
Convert between major currencies using a dated indicative snapshot. Tick the box to try a live public rate in your browser; it falls back to the snapshot if the lookup fails.
Yes. The engine uses the internationally defined exact relationships — for example 1 inch = 2.54 cm, 1 mile = 1.609344 km, and 1 pound = 0.45359237 kg — and only rounds the displayed result, not the calculation.
Unit, temperature, and date conversions run entirely in your browser with no network call, so they work offline. Currency uses an indicative snapshot bundled with the page and can optionally fetch a live public rate when you are online.
The bundled exchange rates are a dated reference snapshot, not live dealing rates. Real rates move continuously and your bank or card adds a margin and fees, so use the figure for rough planning, not for actual trades or transfers.
Length, weight/mass, temperature, volume, area, and speed, plus currency and date differences. Each category includes the common metric and US/imperial units.