Measurement Unit Conversions

Convert between metric and imperial units for length, area, volume, mass, speed, and temperature. Smart category selector, exact factors, and examples for students, engineers, and everyday use.

Full original guide (expanded)

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.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
°C = (°F − 32) × 5/9 °F = (°C × 9/5) + 32 K = °C + 273.15
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
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Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft
Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog
  • 0.1.0-draft — 2026-01-19: Initial draft (review required).