Convert Centistokes to Stokes
Convert Centistokes (cSt) to Stokes (St) instantly and accurately.
Conversion Formula
St = cSt × 0.01
About Centistokes
The centistoke (cSt) equals 10⁻⁶ m²/s = 1 mm²/s. It is the dominant unit for kinematic viscosity in industry worldwide. ASTM D445, ISO 3104, and ACEA lubricant specifications all use cSt. Water at 20 °C ≈ 1.004 cSt; diesel at 40 °C: 2.0-4.5 cSt; SAE 40 oil at 100 °C: 12.5-16.3 cSt. 1 cSt = 10⁻² St.
About Stokes
The stoke (St) equals 1 cm²/s = 10⁻⁴ m²/s, the CGS unit of kinematic viscosity named after Sir George Gabriel Stokes. Its hundredth part, the centistoke, is now dominant, but the stoke still appears in older fluid-mechanics texts and archival API and ASTM data. Water at 20 °C ≈ 0.01004 St; air at 20 °C ≈ 0.1516 St. 1 St = 100 cSt = 10⁻⁴ m²/s.
Quick Reference Table
| Centistokes (cSt) | Stokes (St) |
|---|---|
| 1 cSt | 0.01 St |
| 2 cSt | 0.02 St |
| 5 cSt | 0.05 St |
| 10 cSt | 0.1 St |
| 25 cSt | 0.25 St |
| 50 cSt | 0.5 St |
| 100 cSt | 1 St |