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Length
Convert length units using the shared conversion factors.
Unit converter
Convert length, area, volume, mass, temperature and more with formulas and instant results.
Conversion formula
1 m = 100 cm
Conversion uses the category’s base unit.
Result
100 cm
The result updates as you type.
Common conversions
cm → mm
km → m
m → cm
in → cm
🔥 Popular conversions
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Results are rounded for display.About calculation accuracy
How to convert units
Choose a category, enter a number and select the source and target units. Results and formulas update immediately. Swap reverses the units; popular conversions select a ready-made pair.
Fourteen categories cover length, area, volume, mass, temperature, speed, time, pressure, energy, power, data size, angle, frequency and fuel consumption.
Accuracy and number entry
Most conversions use a common base unit. Temperature uses an offset formula, while fuel consumption can require a reciprocal. Inputs below absolute zero and nonpositive fuel-consumption values are rejected.
Use spaces to group thousands and a comma or full stop as a decimal separator. Displayed values are rounded; very small or large values may use scientific notation.
Different unit standards
US and imperial fuel economy use different gallons. Decimal kilobytes and binary kibibytes are separate units. Mechanical and metric horsepower are also distinct: choose the labelled variant you need.
Copying a result
Copy result copies the equation with the selected units. If clipboard access is unavailable, select and copy the displayed result manually.