Conversions
Unit Conversion Calculators
Exact unit conversions using internationally defined factors, with a dedicated page for each pairing people actually search for.
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All unit conversion calculators
About unit conversion calculators
Most conversions on this site are exact by definition rather than approximate: one inch is exactly 25.4 millimetres, one pound is exactly 0.45359237 kilograms, and one mile is exactly 1,609.344 metres. Those definitions come from the international yard and pound agreement of 1959, and the calculators use them at full precision before rounding for display.
Temperature gets its own treatment because it is an interval scale with an offset, not a simple ratio — which is why you cannot convert 20 °C to Fahrenheit by multiplying alone. Data storage units are handled with both the decimal (kB = 1,000 bytes) and binary (KiB = 1,024 bytes) conventions, because drive manufacturers and operating systems disagree about which one they mean.
Conversions calculator questions
Are the conversions calculators free?
Yes — every conversions calculator on CalcVerse is free to use, with no sign-up and no limit on how many calculations you run.
Do I need to install anything?
No. These are ordinary web pages. They load in any modern browser on desktop, tablet or phone and need no plugin, app or extension.
Where does the calculation happen?
Entirely in your browser, in JavaScript. Nothing you enter is transmitted to a server, which is why the tools keep working if your connection drops.
Can I see the formula being used?
Yes. Every calculator page shows the formula, defines each symbol, and prints the substituted working alongside the result so you can verify it by hand.