Length Converter (Metric • Imperial/US • Others)
Enter a value in any field, click Calculate, and all other fields update. Changing a dropdown unit converts only that field.
Start by entering a value in any field.
Step-by-step derivation
Enter a value, then click Calculate.
References
- Convert any unit to meters, then to all others: valueB = valueA × factor(A→m) ÷ factor(B→m).
- in = 0.0254 m; ft = 0.3048 m; yd = 0.9144 m; mi = 1609.344 m.
- nmi = 1852 m; AU = 149,597,870,700 m; ly ≈ 9.460730472×10^15 m; pc ≈ 3.085677581×10^16 m.
- R⊕ ≈ 6,371,000 m; R☉ ≈ 695,700,000 m; US survey foot = 1200/3937 m.
Use this Length Converter to convert between metric, imperial, US customary, nautical, survey-reference, and astronomy-scale length units.
Conversion Method
The converter uses meters as its base unit:
Target value = input value × source meter factor ÷ target meter factor
For example:
1 foot = 0.3048 meter exactly
Example
Convert 10 feet to meters:
10 × 0.3048 = 3.048 m
Therefore:
10 ft = 3.048 m
Important Note
Use enough decimal precision for the purpose of your conversion. Rounding too early can affect technical or scientific results.
The U.S. survey foot is now obsolete for new applications and should generally be used only for historical or legacy survey data.