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Measurement Utility

Unit Converter

Convert length, weight, temperature, area, volume, speed, time, and data units with quick presets, a full conversion table, and recent history.

8 conversion categories Convert length, weight, temperature, area, volume, speed, time, and data units.
US and global presets Use familiar inch, foot, mile, pound, Fahrenheit, gallon, and square-foot conversions.
Full conversion table Compare one input against every unit in the selected category.
STEP 1

Conversion Input

Choose a category, enter a value, then select the source and target units.

Waiting
Enter a value, choose units, then run the conversion.
PRESETS

Common Conversions

Load common US, travel, shopping, cooking, and tech conversions instantly.

Presets ready
TABLE

Full Conversion Table

View the input converted into every unit in the selected category.

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Unit Value
Enter a value to see the full conversion table.
HISTORY

Recent Conversions

Save recent unit conversions in this browser for quick reuse.

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No conversions saved yet.
Practical guide

Convert everyday units with clear regional and binary definitions

Compare length, mass, temperature, area, volume, speed, time and data size. The full conversion table shows the same input across a category. Before copying a result, check which cup, gallon or data-size convention the source uses.

Prepared & reviewed by
win-j
Last reviewed
2026-09-30

Who this helps

  • People comparing international product specifications
  • Students checking familiar unit conversions

When to use this tool

  • Convert centimeters to inches for a product listing.
  • Convert Celsius to Fahrenheit or compare binary file sizes.

From input to a checked result

  1. 1

    Choose a category and enter the value.

  2. 2

    Select the original and target units, or load a preset.

  3. 3

    Read the result and the full table.

  4. 4

    Check regional definitions and rounding before reusing the number.

Example 1

Centimeters to inches

Input
100 cm → in
Result
39.370079 in

One international inch is 0.0254 meters; the displayed value is rounded to six decimal places.

Example 2

Celsius to Fahrenheit

Input
25 °C → °F
Result
77 °F

Multiply Celsius by 9/5 and add 32.

Example 3

Binary data size

Input
1 GiB → MiB
Result
1,024 MiB

This category uses powers of 1024. GiB and decimal GB are different units.

How it works

Ratio conversions pass through the category’s base unit. Temperature uses °F = °C × 9/5 + 32 and K = °C + 273.15. Normal results display up to six decimal places; very large or small results use scientific notation. Data sizes use B, KiB, MiB, GiB and TiB. Inputs must be finite with an absolute value no greater than 10^15; negative Kelvin input is rejected.

Limitations

  • Cup, pint, gallon, teaspoon and tablespoon use US definitions, not Imperial or metric cooking measures.
  • The fixed regional area factors are 1 pyeong = 3.305785 m², 1 tatami = 1.62 m² and 1 mu = 666.6667 m².
  • Binary data sizes do not use the decimal GB printed on many storage products.
  • Display rounding and the original measurement’s uncertainty limit precision.
Your data

Conversion runs in your browser. Up to eight recent conversions are stored separately for each language in localStorage. Use Clear Recent History to remove them.

Frequently asked questions

Why does 1 GiB equal 1,024 MiB?

Both use binary prefixes. Decimal GB and MB use powers of 1000 and are not the selectable units in this category.

Which gallon does the converter use?

It uses the US liquid gallon, 3.785411784 liters. An Imperial gallon has a different value.

Why are there fewer than six decimal digits sometimes?

Six is the maximum. Trailing zeroes are omitted; extremely large or small results use scientific notation.