Stokes (St)
CGS unit of kinematic viscosity: one square centimeter per second, exactly 10⁻⁴ m²/s.
What is a stokes?
- Symbol
- St
- Quantity
- Kinematic Viscosity
- Unit system
- CGS
- Definition
- CGS unit of kinematic viscosity: one square centimeter per second, exactly 10⁻⁴ m²/s.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
The CGS unit of kinematic viscosity, found in older literature and for thick oils.
Stokes in other kinematic viscosity units
- 1 St = 0.0001 m²/sSquare meter per second
- 1 St = 100 mm²/sSquare millimeter per second
- 1 St = 100 cStStokes to Centistokes converter
- 1 St ≈ 0.001076391042 ft²/sSquare foot per second
- 1 St ≈ 0.15500031 in²/sSquare inch per second
Stokes quick reference
| Stokes | Centistokes | Square foot per second | Square meter per second |
|---|---|---|---|
| 1 St | = 100 cSt | ≈ 0.001076391042 ft²/s | = 0.0001 m²/s |
| 10 St | = 1000 cSt | ≈ 0.01076391042 ft²/s | = 0.001 m²/s |
| 100 St | = 10000 cSt | ≈ 0.1076391042 ft²/s | = 0.01 m²/s |
| 1000 St | = 100000 cSt | ≈ 1.076391042 ft²/s | = 0.1 m²/s |
Where the stokes fits
The next smaller kinematic viscosity unit is the square millimeter per second (mm²/s). 1 St = 100 mm²/s, and 1 mm²/s = 0.01 St.
The next larger kinematic viscosity unit is the square inch per second (in²/s). 1 St ≈ 0.15500031 in²/s, and 1 in²/s = 6.4516 St.
Frequently asked questions
- How many centistokes are in one stokes?
- One stokes = 100 cSt (centistokes).
- How many square feet per second are in one stokes?
- One stokes ≈ 0.001076391042 ft²/s (square feet per second).
- How many square meters per second are in one stokes?
- One stokes = 0.0001 m²/s (square meters per second).