# The best Spring Rate Conversion Chart – Convert KG/mm to LBS/in EASY !

The best Spring Rate Conversion Chart – Convert KG/mm to LBS/in EASY !

Many of our enthusiast are searching to buy Coilovers or Springs for their new or existing project car . a HUGE HUGE problem is that many manufacturers show their spring rates ONLY as kg/mm and others show them as lbs/in. We put together a quick and easy chart to use for reference when purchasing coil overs and comparing from your factory OEM suspension.

About 1 KG/mm is equal to 55.996 LBS/in. A good way to remember is 1 KG/mm = 56 LBS/in.

Here’s a reference charts:

700 lb/in = 12.5 kg/mm
650 lb/in = 11.6 kg/mm
600 lb/in = 10.7 kg/mm
550 lb/in = 9.8 kg/mm
500 lb/in = 8.9 kg/mm
450 lb/in = 8 kg/mm
400 lb/in = 7.1 kg/mm
350 lb/in = 6.2 kg/mm
300 lb/in = 5.3 kg/mm
250 lb/in = 4.5 kg/mm

kg/mm to lbs/in
—————————–
16 = 896
15 = 840
14 = 784
13 = 728
12 = 672
11 = 616
10 = 560
9.0 = 504
8.5 = 476
8.0 = 448
7.5 = 420
7.0 = 392
6.5 = 364
6.0 = 336
5.5 = 308
5.0 = 280
4.5 = 252
4.0 = 224
3.0 = 168
2.0 = 112