1. Convert to meters
meters = input value x input unit factor
Every supported unit is stored as an exact or standard factor relative to meters.
Common unit converter
Distance Unit Converter
Convert length and distance units for engineering, drawing checks, navigation, science, and everyday metric-imperial work.
Live length conversion
Convert distance units
Enter a value, choose the starting unit, and select a target unit. The full conversion table updates automatically.
Converted value
All units
Distance conversion table
Use this table to compare the entered value across metric, imperial, navigation, and scientific distance units.
Common conversions
Useful distance conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| Millimeters to inches | in = mm / 25.4 | Drawing dimensions, fasteners, machining |
| Meters to feet | ft = m x 3.280839895 | Building dimensions, field measurements |
| Kilometers to miles | mi = km x 0.621371192 | Road distance and travel estimates |
| Feet to meters | m = ft x 0.3048 | Surveying, construction, engineering reports |
| Nautical miles to kilometers | km = nmi x 1.852 | Marine and aviation navigation |
| Mils to millimeters | mm = mil x 0.0254 | Thin materials, coatings, manufacturing tolerances |
How it works
Distance conversion method
2. Convert from meters
target value = meters / target unit factor
The selected result and all table values are calculated from the same base-meter value.
3. Check precision
rounding depends on scale
Very small and very large values use compact scientific notation to stay readable.
FAQ
Distance converter questions
How accurate is the distance converter?
The converter uses standard defined factors where available, including 1 inch = 0.0254 m, 1 foot = 0.3048 m, 1 mile = 1609.344 m, and 1 nautical mile = 1852 m.
Can I use this for engineering drawings?
Yes, it is useful for quick dimension checks and metric-imperial conversions. For released drawings, keep the required project unit standard and rounding rules.
Why are light-years included?
Light-years are useful for astronomy and science contexts. They are included separately from everyday and engineering units because the scale is much larger.
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