Length Converter
Convert metres, feet, miles, and more.
Inputs
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Formula
result = value × (from.toBase ÷ to.toBase)
Every length unit is stored as a multiplier to metres (the base). Multiply your input by the source factor to get metres, then divide by the target factor. Example: 1 mile = 1609.344 m, 1 foot = 0.3048 m.
Worked example
100 metres converts to 0.1 kilometres — useful when a floor plan is in metres but a property listing quotes plot size in km or hectares.
Where this can give the wrong answer
- Nautical miles and survey feet aren't included; this uses the standard SI and US customary factors (1 mi = 1609.344 m, 1 ft = 0.3048 m).
- Very small values in millimetres or very large values in miles can show long decimal strings — the display caps at six decimal places.
- Negative lengths are accepted as input but have no physical meaning; treat them as a sign error.
FAQ
- It does — 1 inch is defined as exactly 25.4 mm (0.0254 m). If a result looks off, check that you picked the right unit; 'in' is inches, not a generic abbreviation.