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Convert units.
A practical unit converter for everyday calculations. Choose a unit, enter a number and get your answer instantly.
Length
Use a point or comma for decimals, without thousands separators (e.g. 1000.5).
ALL IN ONE PLACE
Useful units
Five categories, everyday units and instant results.
FROM MEASUREMENT TO A DECISION
Practical measurement guides
Worked examples for the questions a conversion factor alone cannot answer.
How to read and compare land areas
Compare two plots, decode mixed-unit records and calculate the area of a simple shape.
Read the guide Reading dimensionsHow to read dimensions in inches and centimeters
Decode 5′ 8″ and 2½ in, convert every side and avoid rounding errors when checking a fit.
Read the guideHOW IT WORKS
From a number
to an answer.
Choose a category
Length, area, mass, volume or temperature.
Enter a value
The result changes instantly, with no submit button.
Copy your result
Copy it with one click and get on with your work.
Practical conversions
Formulas, tables and worked examples for specific units.
Hectares to ares
Convert land and plot area
Inches to centimeters
Screen diagonals and everyday dimensions
Kilograms to pounds
Kilograms and international pounds (lb)
Centimeters to inches
cm to inches
Millimeters to inches
mm to inches
Centimeters to meters
cm to m
Meters to centimeters
m to cm
Meters to inches
m to in
Inches to meters
in to m
Pounds to kilograms
lb to kg
Milliliters to liters
mL to L