Spring constant conversion
4 units, with N/m as the base. Every value in the factor table is the number you multiply by, so reading across a row converts out of that unit and reading down a column converts into it.
Factor table
| from \ to | N/m | N/mm | kN/m | lbf/in |
|---|---|---|---|---|
| N/m | 1 | 0.001 | 0.001 | 0.00571015 |
| N/mm | 1000 | 1 | 1 | 5.71015 |
| kN/m | 1000 | 1 | 1 | 5.71015 |
| lbf/in | 175.127 | 0.175127 | 0.175127 | 1 |
Prefixes such as milli, micro and kilo follow the SI prefixes table.
The values are facts and free to use; this table’s selection and presentation are © 2026 ScienceQuest.
Worked example
- 1 N/mm in N/m
- = 1 × 1000
- = 1000 N/m
Convert a number
The table gives the factor; the unit converter does the arithmetic, remembers the units you picked, and turns any conversion into a link you can share.