Which measurements can I convert?
The converter covers length, mass, temperature, area, volume, time, speed, pressure, energy, and decimal or binary data storage units.
Unit Converter
Convert length, mass, temperature, speed, pressure, energy, volume, time, area, and data units.
Workspace
Preparing comparison tools…
Live conversion
Convert a measurement
m
Converted value
1 m = 0.001 km
Comparison table
All length units
Enter a valid value to compare every unit in this category.
Results use the selected number of significant digits. Decimal storage units use powers of 1000; binary units use powers of 1024.
GuideHow to use
- Choose a measurement category or load a common conversion preset.
- Enter the source value and select the source and destination units.
- Adjust the significant digits when you need a shorter or more precise result.
- Copy the number or full equation, choose another result from the comparison table, or download the table as CSV.
HelpFrequently asked questions
What is the difference between significant digits and decimal places?
Significant digits count meaningful digits across the whole number, while decimal places count only digits after the decimal point. Significant digits keep results readable across very large and very small conversions.
Why are US and Imperial gallons different?
A US gallon is about 3.785 litres, while an Imperial gallon is about 4.546 litres. Choose the explicitly labelled system when converting volume.
How are decimal and binary data units handled?
KB, MB, GB, and TB use powers of 1000. KiB, MiB, GiB, and TiB use powers of 1024.
Can a temperature be below absolute zero?
No. Absolute zero is 0 kelvin, equal to -273.15 degrees Celsius or -459.67 degrees Fahrenheit. The converter flags lower values as invalid.
Why can a converted value be slightly rounded?
Most unit factors are exact or standardized, but the displayed result is rounded to your selected number of significant digits. Increase that setting when you need more displayed precision.
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