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Unit Converter

A complete converter for 20 categories including length, mass, temperature, area, volume, speed, data, pressure, and energy, with batch conversion, smart precision, comparison tables, favorites, and history.

20 categories · 159 units

Complete unit conversion workspace

Enter a value once to see the target result and every equivalent unit in the category. Scientific notation, batch processing, and favorites are built in.

Scientific notation

Length

Metric, imperial, nautical mile, and Chinese li

Supports negatives, decimals, thousands separators, and scientific notation such as 1e6.

0.001km
Quick values

All unit equivalents

Every equivalent value for 1 m.

UnitConverted value
0.001
1
10
100
1,000
1,000,000
1,000,000,000
39.370079
3.2808399
1.0936133
0.00062137119
0.0005399568
0.002
Conversion relationship

1 m = 0.001 km

Uses fixed international definitions. Temperature conversions account for both scale and zero-point offsets.

Conversion history
Use “Save to history” to restore recent conversions from here.

About Unit Converter

Convert everyday physical and digital units in one place. A complete converter for 20 categories including length, mass, temperature, area, volume, speed, data, pressure, and energy, with batch conversion, smart precision, comparison tables, favorites, and history. The core workflow is designed to run in your current browser.

Key capabilities

  • 20 categories with over 150 metric, imperial, and digital units
  • Multi-line batch conversion with copy and CSV export
  • Significant digits, scientific notation, and precise conversion factors
  • Favorite categories and units with locally stored conversion history

Useful for

  • Handle travel, cooking, fitness, and everyday size or weight conversions
  • Quickly check engineering, energy, pressure, torque, and flow values
  • Compare decimal and binary storage units and process values in batches

Frequently asked questions

Is Unit Converter free to use online?

Yes. Unit Converter opens in a modern browser and does not require desktop software installation.

What is Unit Converter useful for?

Common use cases include Handle travel, cooking, fitness, and everyday size or weight conversions; Quickly check engineering, energy, pressure, torque, and flow values.

Is my input or file uploaded?

The core processing workflow is designed to run locally in the browser. Key capabilities include 20 categories with over 150 metric, imperial, and digital units, Multi-line batch conversion with copy and CSV export, Significant digits, scientific notation, and precise conversion factors; account, comments, and anonymous analytics may still create normal site requests.

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