UNIT CONVERTER / Length Converter

Length Converter

Compare SI length units with international inches, feet and yards using the meter as the base unit.

Inputs

Updates as you type

Value to convert

Results

Decimal places

1,000mm

Results
cm	100 cm
m	1 m
km	0.001 km
inch	39.37 inch
ft	3.281 ft
yard	1.094 yard

Overview

Compare SI length units with international inches, feet and yards using the meter as the base unit.

Formula

1 m = 1,000 mm = 100 cm
1 inch = 0.0254 m
1 ft = 0.3048 m
1 yard = 0.9144 m

Example

1 m equals 1,000 mm, approximately 39.370079 inches and 3.280840 feet.

How to use

Check the units, enter the required values and select the available calculation options.
Results update immediately. Correct any highlighted input before using the result.
Choose display precision, copy the result or share the current inputs. Reset restores the example values.

Engineering notes

Uses the international foot, not the historical US survey foot.
Changing the input unit preserves the entered number and interprets it in the new unit. Signed coordinate differences are allowed.

Frequently asked questions FAQ

Can I enter 5 feet 6 inches together?

Mixed-unit input is not supported. Enter 5.5 ft or 66 inches instead.

Does display precision change the calculation?

No. Rounding is applied only to displayed results, not intermediate calculations. Small nonzero values use scientific notation. Consider the precision of the original measurements when interpreting results.