Fast, simple unit converters
Convert speed, weight, length, temperature and more. Accurate factors, instant results, clear formulas.
Popular converters
All categories
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Converter for speed
mph, km/h, m/s, knots, ft/s
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Converter for weight
kg, lb, g, oz
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Converter for length
m, cm, mm, km, in, ft, yd, mi
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Converter for temperature
°C, °F, K
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Converter for volume
L, mL, gal, qt, pt, fl oz
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Converter for area
m², cm², km², ft², yd², ac
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Converter for time
ms, s, min, h, d
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Converter for data
bit, byte, KB, MB, GB
Accuracy & how we calculate
We use internationally recognized conversion factors (e.g., 1 mile = 1609.344 m, 1 inch = 25.4 mm). Results are computed at full precision, then rounded for readability. Each page shows the exact formula and sample calculations.
Questions or suggestions? Contact us.
FAQs
Are these converters free to use?
Yes. Everything on Converter for is free and fast to use, no sign-up.
How precise are the results?
Calculations use exact factors; the display rounds to a sensible number of decimals. See each page for the formula.
Can I link to a specific converter?
Absolutely. For example: /speed/mph-to-kph/.