SwiftTooly

Unit Converter

Convert length, weight, temperature, volume, speed and more.

Your files never leave your device. No upload. No sign-up.

1 mm = 0.1 cm

Popular conversions

Jump straight to a pre-set converter with formula, examples and quick-reference table.

Kilometers → MilesMiles → KilometersCentimeters → InchesKilograms → PoundsCelsius → FahrenheitFahrenheit → CelsiusLiters → Gallons (US)Cups (US) → MillilitersMiles per hour → Kilometers per hourMegabytes → Gigabytes
Browse all unit conversions →

About the Unit Converter

Convert between metric and imperial units across length, weight, temperature, area, volume, speed, time and data storage. Pick a category, type a value, and see the converted result instantly. All math runs in your browser using verified conversion factors.

How to use the Unit Converter

  1. 1Choose a category (Length, Weight, Temperature, and so on).
  2. 2Pick the unit you're converting from and the unit you want to convert to.
  3. 3Type the value you want to convert — the result updates as you type.
  4. 4Tap the swap button to flip the direction of the conversion.

Why use our Unit Converter

  • 8 unit categories

    Length, weight, temperature, area, volume, speed, time and data storage.

  • Verified factors

    Uses the same constants as the international standards (1 in = 25.4 mm, 1 lb = 0.453592 kg).

  • Live results

    No 'convert' button — the answer updates the moment you type.

  • Browser-only

    All conversions happen locally. Nothing you type is uploaded or logged.

Frequently asked questions

Which gallon, cup and pint does this use?+

The volume units default to US customary (US gallon = 3.78541 L, US cup = 236.588 mL, US pint = 473.176 mL). For imperial UK units, multiply by the relevant factor manually.

Is 1 GB equal to 1024 MB or 1000 MB?+

This converter uses the binary convention (1 GB = 1024 MB, technically a GiB), which matches what most operating systems report. Drive manufacturers and ISPs often use the decimal convention (1 GB = 1000 MB).

How accurate are the temperature conversions?+

Temperature conversions use the exact formulas (°F = °C × 9/5 + 32, K = °C + 273.15) so they're mathematically precise to the displayed digits.

Can I link to a pre-set conversion like km to miles?+

Yes. SwiftTooly has dedicated pages for the most common pairs — for example, /units/km-to-miles, /units/kg-to-lbs and /units/celsius-to-fahrenheit.