One shared basis for every calculator
This tool uses the same central unit registry as the specialised calculators. Values pass through SI internally, with temperature offsets handled explicitly.
Engineering fundamentals
Engineering Unit Converter
Convert lengths, forces, torques, stresses, and other engineering quantities reliably between metric and US units.
SICORE
01
Conversion
02
Converted valueResult quantity “Converted value”. It applies to the entered values and the model scope stated on this page.
100 mm = 3.93700787 in
More conversions
- µm
- 100,000
- cm
- 10
- m
- 0.1
- in
- 3.93700787
- ft
- 0.32808399
- mil
- 3,937.00787402
Where this tool helps
Use it to prepare catalogue data, drawing dimensions, and comparison calculations—for example lbf to N, ksi to MPa, or lbf·in to N·m. Unit conversion does not replace an engineering design check.