Calculators & Converters

Length Converter

Convert metric, US, and UK lengths and combine feet and inches. See equivalent values in every supported unit, control display precision, and export a conversion table.

Free online tool

Loading tool…

Length Converter

International foot: exactly 0.3048 m. Historical US survey feet are not included.

Converted value

Meters (m)3.048

Meters (m)

Display rounding does not change the calculation. Scientific notation keeps very small values visible; extra digits do not add measurement accuracy.

Equivalent values for 10 Feet — international (ft)
UnitEquivalent
Millimeters (mm)3048
Centimeters (cm)304.8
Meters (m)3.048
Kilometers (km)0.003048
Inches (in)120
Feet — international (ft)10
Yards (yd)3.33333333
Miles — international (mi)0.00189393939
Nautical miles — international (nmi)0.00164578834

Combine feet and inches

Enter whole feet and an inch remainder below 12. Useful for a height or a drawing dimension.

1.7272Combined length (m)
172.72Centimeters (cm)
68Total inches (in)

All entered measurements and calculations stay in this browser. No external API or uploaded dataset is used.

GET STARTED

How to use the Length Converter

  1. 01

    Enter a numeric value without a comma separator or unit suffix, then choose the source and destination units.

  2. 02

    Read the main result and equivalent-unit table. Choose 3, 6, 9, or 12 significant digits for display; calculation constants are not rounded to match the display.

  3. 03

    Use the combine feet and inches panel for the practical calculation. Restore its example independently from the converter.

  4. 04

    Copy the conversion or task results, or download the displayed conversion table as a CSV. Clear removes the converter value.

Examples

A ten-foot board

10 international feet equals 3.048 meters exactly. Choose inches to see the same length as 120 inches.

A height in two parts

5 feet 8 inches is 68 inches, or 172.72 centimeters. Use the feet-and-inches panel so 5.8 feet is not mistaken for 5 feet 8 inches.

Which foot does this use?

The international foot is exactly 0.3048 meter, and an inch is exactly 0.0254 meter. The mile here is 5,280 international feet. A nautical mile is 1,852 meters. Historic survey measurements may use a different foot; check the original survey before converting coordinates.

Reading decimal measurements

A decimal foot is a fraction of a whole foot: 0.5 foot is 6 inches. The mixed-unit panel treats feet as a whole number and inches as the remaining part. It does not round to carpentry fractions or account for saw kerf.

Precision and accepted input

Use a decimal point or scientific notation such as 1e3. Blank values, unit suffixes, separators, and nonfinite numbers are rejected. Input magnitudes above 1e100 or nonzero magnitudes below 1e-100 are outside the supported range. The table rounds only for presentation, so 12 displayed digits should not be interpreted as 12 digits of measurement accuracy. Binary floating-point calculations can differ from exact decimal arithmetic in the final digits.

What to know

  • No historical survey-foot, astronomical-distance, or fraction-of-an-inch rounding modes.

Common questions

Is a UK foot different from a US foot?

Modern everyday US and UK measurements use the same international foot. The retired US survey foot is a separate historic unit and is excluded here.

Can I type fractions?

Use a decimal such as 0.125 for one eighth, or scientific notation such as 1e3. Slash fractions, unit text, and comma separators are rejected.

Sources & references