Quick reference
Common engineering length conversions
Use exact inch-to-metric relationships when converting section dimensions or load locations.
| From | Equivalent |
|---|---|
| 1 in | 25.4 mm |
| 1 ft | 304.8 mm |
| 1 ft | 12 in |
| 1 m | 3.28084 ft |
| 1 m | 39.3701 in |
Supporting engineering utility
Engineering Length Converter
Convert beam spans, support and load locations, deflections, and section dimensions between metric and imperial length units.
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Enter a value in any field
Convert length units
Next step
Open the Beam Calculator
Use one consistent length unit for the beam span and every support, section, and load location.
Engineering context
Length units in beam analysis
Beam length, support locations, load locations, and section extents must use the length unit selected in the model.
Section-property dimensions often use millimetres or inches even when the overall span is shown in metres or feet. Let the calculator perform its supported unit-system conversion rather than mixing raw inputs.
Keep location units consistent
A load at 2.5 m is not the same location as 2.5 ft. Convert every coordinate when switching a model between metric and imperial units.
Where this conversion is used
Structural engineering applications
- Beam spans
- Support and load locations
- Section dimensions
- Deflection and displacement values
Questions engineers ask
Length conversion FAQ
How many millimetres are in one inch?
One international inch is exactly 25.4 millimetres.
How many metres are in one foot?
One international foot is exactly 0.3048 metres.
Can I mix metres and millimetres in a beam model?
Only where the interface explicitly assigns different units. Span and location inputs should follow the selected beam length unit.
Conversion factors follow SI and U.S. customary unit relationships. Rounded reference values are for convenience; the live converter uses higher-precision factors.