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Length Converter | cm m inch ft Unit Conversion
A free tool to convert length units like cm, m, km, inch, and ft. With anchors such as 1 inch = 2.54 cm and 1 ft = 30.48 cm, you can compare overseas specs, fabrication dimensions, and field measurements without mixing up metric and imperial units.
How to use
Adjust settings
Choose the source and target units.
Adjust output options
Check the converted result instantly.
Real-world scenarios
Useful for furniture sizing, international shopping specs, and fabrication work.
Convert imported furniture or appliance specs (inch, ft) to cm to check the fit at home.
Switch drawing and fabrication dimensions between mm, cm, and m to avoid build errors.
Convert overseas height (ft/inch) or TV and monitor sizes to cm for comparison.
Length Unit Conversion Table
Length units mix the metric system (mm, cm, m, km) with the imperial system (inch, ft), which is easy to confuse. Use the reference values below for the most common conversions.
| Unit | Equivalent |
|---|---|
| 1cm | 10mm = 0.01m |
| 1m | 100cm = 1,000mm |
| 1km | 1,000m |
| Unit | Equivalent |
|---|---|
| 1 inch | 2.54cm = 25.4mm |
| 1 ft | 30.48cm = 0.3048m = 12 inch |
| 1m | ≈ 39.37 inch ≈ 3.28 ft |
| 1cm | ≈ 0.3937 inch |
| 1km ≈ 0.621 mile, 1 mile ≈ 1.609km |
| A 32-inch TV or monitor refers to the diagonal (about 81.3cm), not the width. |
| A height of 5 ft 9 in is about 175.3cm — convert feet and inches separately, then add. |
Frequently Asked Questions
How many cm is 1 inch?
1 inch is exactly 2.54cm (25.4mm). Conversely, 1cm is about 0.3937 inch.
How many cm is 1 foot (ft)?
1 ft equals 30.48cm (0.3048m), the same as 12 inches. For example, 6 ft is about 182.9cm.
How tall is 5 ft 9 in in cm?
5 ft 9 in is (5×30.48)+(9×2.54)=152.4+22.86, about 175.3cm. Convert feet and inches to cm separately, then add them.
How do I convert cm to inches?
Multiply the cm value by 0.3937, or divide by 2.54. Example: 100cm ÷ 2.54 ≈ 39.37 inches.
What length does a TV or monitor "inch" refer to?
It is the diagonal of the screen, not the width. A 32-inch screen means about 81.3cm diagonally.