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Quick converter
Length conversion workspace
Enter a decimal, fraction or quick calculation — for example 12.5, 3/8 or (12*4)+6.5.
Batch conversionconvert up to 100 values at once
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Compare all length units
One input, every supported equivalent. Select any row as the main target.
| Unit | Equivalent | Target action |
|---|---|---|
| Meters m | 1 | SourceSource |
| Feet ft | 3.28 | TargetSelected |
| Centimeters cm | 100 | |
| Millimeters mm | 1,000 | |
| Inches in | 39.37 | |
| Yards yd | 1.09 | |
| Kilometers km | 1E-3 | |
| Miles mi | 6.21E-4 | |
| Nautical Miles nmi | 5.4E-4 |
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A focused toolkit for real-world measurements, from body metrics to digital data.
Height
Convert human height between centimeters and feet plus inches without calculating the remainder yourself.
cm · ft + in
Grams to Cups
Ingredient-aware grams to US cups and cups to grams calculator for common baking ingredients.
g · US cup
BMI
Adult Body Mass Index screening calculator using height and weight.
metric · imperial
Power
Power is the rate at which energy is transferred.
W · kW · hp · PS
Energy
Energy measures the capacity to perform work.
J · kWh · kJ · cal
Speed
Speed measures distance travelled per unit of time.
mph · km/h · m/s · kn
Length
Length measures distance or dimension.
m · ft · cm · mm
Weight
Weight is commonly expressed with mass units in everyday conversions, including the 14-pound British stone.
kg · lb · g · t
Temperature
Temperature scales describe how hot or cold something is.
°C · °F · K · °R
Volume
Convert volume across metric units and explicitly labelled US liquid cups, fluid ounces, tablespoons, teaspoons, pints, quarts and gallons.
L · gal · imp gal · mL
Area
Area measures two-dimensional space. One are is exactly 100 square metres and one hectare is 100 ares.
m² · a · ha · ft²
Pressure
Pressure is force distributed over an area.
Pa · kPa · bar · psi
Digital Data
Digital data uses decimal SI units and clearly labelled binary units where applicable.
bit · B · kb · kB
Time
Time converts durations using exact SI seconds for the supported units.
s · min · h · d
Angle
Angle measurements describe rotation.
° · rad · gon
Fuel Economy
Fuel economy can be expressed as volume used per distance or distance per volume.
L/100 km · mpg · mpg (UK)
Pace
Running pace is the time needed to cover a distance.
min/km · min/mi
Quick references
Common unit conversions
Focused pages with a live calculator, formula, worked examples and transparent measurement sources.
Good to know
Frequently asked questions
Everything you need to get a reliable answer quickly.
Which conversions are supported?
Fourteen standard unit categories, plus dedicated height, BMI and ingredient-aware grams-to-cups calculators.
How do I share a conversion?
Every conversion is encoded in the URL. Use the Share button to open the share dialog or copy the link - anyone who opens it sees exactly the same conversion.
How accurate are the results?
Conversions use exact standard factors (for example 1 are = 100 m² and 1 hectare = 10,000 m²) with an adjustable precision of up to 12 decimal places.