Spring Rate Converter
Enter your spring rate in lb/in or kg/mm and have it automatically converted.
Not every manufacturer lists their spring rates in both units so a converter can be handy when comparing options.
If you’d like to convert rates yourself:
- kg/mm / 55.88 = lb/in
- lb/in * 55.88 = kg/mm
Quick Reference
| lb/in | kg/mm |
|---|---|
| 100 | 1.79 |
| 150 | 2.68 |
| 200 | 3.58 |
| 250 | 4.47 |
| 300 | 5.37 |
| 350 | 6.26 |
| 400 | 7.16 |
| 450 | 8.05 |
| 500 | 8.95 |
| 550 | 9.84 |
| 600 | 10.74 |
| 650 | 11.63 |
| 700 | 12.53 |
| 750 | 13.42 |
| 800 | 14.32 |
| 850 | 15.21 |
| 900 | 16.11 |
| 950 | 17 |
| 1000 | 17.9 |
| kg/mm | lb/in |
|---|---|
| 1 | 56 |
| 2 | 112 |
| 3 | 168 |
| 4 | 224 |
| 5 | 279 |
| 6 | 335 |
| 7 | 391 |
| 8 | 447 |
| 9 | 503 |
| 10 | 559 |
| 11 | 615 |
| 12 | 671 |
| 13 | 726 |
| 14 | 782 |
| 15 | 838 |
| 16 | 894 |
| 17 | 950 |
| 18 | 1006 |