Here is a conversion table that lets you convert viscosity in cSt @ 100C to a high resolution "SAE viscosity".
For instance, the table assumes that the upper and lower limits for each SAE J300 viscosity 20, 30, 40, 50, 60 is 1/2 way to the next viscosity, i.e 15, 25, 35, 45, 55, 65. The values in between are linearly interpolated.
It can be useful for comparing thick and thin variations of a standard SAE viscosity.
For instance, 9.2 cSt oil is 20 weight
9.4 and 12.4 cSt are 30 weight.
The table helps show that the thick 20 weight at SAE 24.7 is much closer to the thin 30 weight at SAE 25.3 (0.6 diff.) than the thin 30 weight is to the thick 30 weight at 34.7 (9.4 diff.).
code:
cSt SAE cSt SAE cSt SAE cSt SAE
5.6 15.0 10.8 29.7 16.0 44.2 21.2 53.8
5.7 15.3 10.9 30.0 16.1 44.5 21.3 53.9
5.8 15.5 11.0 30.3 16.2 44.7 21.4 54.1
5.9 15.8 11.1 30.6 16.3 45.0 21.5 54.3
6.0 16.1 11.2 30.9 16.4 45.2 21.6 54.5
6.1 16.4 11.3 31.2 16.5 45.4 21.7 54.6
6.2 16.6 11.4 31.6 16.6 45.5 21.8 54.8
6.3 16.9 11.5 31.9 16.7 45.7 21.9 55.0
6.4 17.2 11.6 32.2 16.8 45.9 22.0 55.2
6.5 17.4 11.7 32.5 16.9 46.1 22.1 55.5
6.6 17.7 11.8 32.8 17.0 46.3 22.2 55.7
6.7 18.0 11.9 33.1 17.1 46.4 22.3 56.0
6.8 18.2 12.0 33.4 17.2 46.6 22.4 56.2
6.9 18.5 12.1 33.7 17.3 46.8 22.5 56.4
7.0 18.8 12.2 34.1 17.4 47.0 22.6 56.7
7.1 19.1 12.3 34.4 17.5 47.1 22.7 56.9
7.2 19.3 12.4 34.7 17.6 47.3 22.8 57.1
7.3 19.6 12.5 35.0 17.7 47.5 22.9 57.4
7.4 19.9 12.6 35.3 17.8 47.7 23.0 57.6
7.5 20.1 12.7 35.5 17.9 47.9 23.1 57.9
7.6 20.4 12.8 35.8 18.0 48.0 23.2 58.1
7.7 20.7 12.9 36.1 18.1 48.2 23.3 58.3
7.8 20.9 13.0 36.3 18.2 48.4 23.4 58.6
7.9 21.2 13.1 36.6 18.3 48.6 23.5 58.8
8.0 21.5 13.2 36.8 18.4 48.8 23.6 59.0
8.1 21.8 13.3 37.1 18.5 48.9 23.7 59.3
8.2 22.0 13.4 37.4 18.6 49.1 23.8 59.5
8.3 22.3 13.5 37.6 18.7 49.3 23.9 59.8
8.4 22.6 13.6 37.9 18.8 49.5 24.0 60.0
8.5 22.8 13.7 38.2 18.9 49.6 24.1 60.2
8.6 23.1 13.8 38.4 19.0 49.8 24.2 60.5
8.7 23.4 13.9 38.7 19.1 50.0 24.3 60.7
8.8 23.6 14.0 38.9 19.2 50.2 24.4 61.0
8.9 23.9 14.1 39.2 19.3 50.4 24.5 61.2
9.0 24.2 14.2 39.5 19.4 50.5 24.6 61.4
9.1 24.5 14.3 39.7 19.5 50.7 24.7 61.7
9.2 24.7 14.4 40.0 19.6 50.9 24.8 61.9
9.3 25.0 14.5 40.3 19.7 51.1 24.9 62.1
9.4 25.3 14.6 40.5 19.8 51.3 25.0 62.4
9.5 25.6 14.7 40.8 19.9 51.4 25.1 62.6
9.6 25.9 14.8 41.1 20.0 51.6 25.2 62.9
9.7 26.2 14.9 41.3 20.1 51.8 25.3 63.1
9.8 26.6 15.0 41.6 20.2 52.0 25.4 63.3
9.9 26.9 15.1 41.8 20.3 52.1 25.5 63.6
10.0 27.2 15.2 42.1 20.4 52.3 25.6 63.8
10.1 27.5 15.3 42.4 20.5 52.5 25.7 64.0
10.2 27.8 15.4 42.6 20.6 52.7 25.8 64.3
10.3 28.1 15.5 42.9 20.7 52.9 25.9 64.5
10.4 28.4 15.6 43.2 20.8 53.0 26.0 64.8
10.5 28.7 15.7 43.4 20.9 53.2 26.1 65.0
10.6 29.1 15.8 43.7 21.0 53.4
10.7 29.4 15.9 43.9 21.1 53.6
