What is the easiest way to convert between measurement units?

Pick the correct category (length, mass, volume, area, speed, or temperature), choose from and to units, then multiply by the right conversion factor. This page automates that for you and also shows exact factors for common units.

Does this converter support both metric and imperial units?

Yes. It converts metric (m, km, L, kg) to imperial/US customary (inch, foot, mile, gallon US, pound) and the other way around, including temperature conversions.

How are temperature conversions handled?

Temperature needs formulas, not just multiplication. The tool uses exact formulas: C = (F − 32) × 5/9, F = C × 9/5 + 32, K = C + 273.15.

Measurement Unit Conversions

Pick a category, enter your value, and instantly convert between common metric and imperial units. This page aims to do what 6 separate converters do — on one screen.

Universal converter

Result

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All units in this category

How this converter works

For most quantities (length, mass, volume, area, speed) conversion is done through a base unit. We convert your input to the base unit, then to every other unit.

Length base: meter (m)
Mass base: kilogram (kg)
Volume base: liter (L)
Area base: square meter (m²)
Speed base: meter per second (m/s)

Temperature exception

Temperature uses formulas, not factors.

°C = (°F − 32) × 5/9
°F = (°C × 9/5) + 32
K = °C + 273.15

FAQ

Can I convert gallons to liters here?

Yes. Choose the Volume category, set “From” to “gallon (US)” and “To” to “liter”.

Why do I see US gallon and not UK gallon?

This version uses US liquid measure because it’s the most searched. You can extend it easily by adding 1 imp gal = 4.54609 L in your own copy.

Is this suitable for SAT / school conversions?

Yes. The structure matches what SAT, GCSE and most high-school courses expect: pick unit, multiply by conversion factor, get answer.