Convert kinematic viscosity units — m²/s, Stokes, centistokes, ft²/s and more.
| Unit | Name | Value |
|---|---|---|
| m²/s | Square Meter/Second | 0.0001 |
| St | Stokes | 1 |
| cSt | Centistokes | 100 |
| ft²/s | Square Foot/Second | 0.0010763915 |
| in²/s | Square Inch/Second | 0.15500031 |
Formula: ft²/s = cm²/s × 0.001076
Multiply any cm²/s value by 0.001076 to get ft²/s.
Reverse: cm²/s = ft²/s × 929
Water reference (20°C): 0.01004 cm²/s = 1.0807e-5 ft²/s
Values at ~20°C unless noted. Factor: 1 cm²/s = 0.001076 ft²/s
| cm²/s (cm²/s) | ft²/s (ft²/s) | Fluid |
|---|---|---|
| 0.00015 cm²/s | 1.615e-07 ft²/s | Air (20°C) |
| 0.005 cm²/s | 5.382e-06 ft²/s | Petrol (gasoline) |
| 0.01004 cm²/s | 1.081e-05 ft²/s | Water (20°C) |
| 0.015 cm²/s | 1.615e-05 ft²/s | Ethanol |
| 0.03 cm²/s | 3.229e-05 ft²/s | Diesel fuel |
| 0.35 cm²/s | 0.0003767 ft²/s | SAE 10W motor oil |
| 0.84 cm²/s | 0.0009042 ft²/s | Olive oil |
| 1 cm²/s | 0.001076 ft²/s | SAE 30 motor oil |
| 1.8 cm²/s | 0.001938 ft²/s | SAE 90 gear oil |
| 14.1 cm²/s | 0.01518 ft²/s | Glycerin (20°C) |
| 50 cm²/s | 0.05382 ft²/s | Honey |
| 80 cm²/s | 0.08611 ft²/s | Molasses |
| 500 cm²/s | 0.5382 ft²/s | Tomato ketchup |
| 2500 cm²/s | 2.691 ft²/s | Peanut butter |
| 1.000e+19 cm²/s | 1.076e+16 ft²/s | Glass (room temp) |
1 cm²/s = 0.001076 ft²/s.
Water at 20°C = 1 cSt = 0.01 St = 10⁻⁶ m²/s. Use as reference.
Multiply result by 929 to recover the original cm²/s value.
Specifies lubricant viscosity grades in cSt at 40°C and 100°C per ISO VG and SAE standards.
Uses kinematic viscosity in cSt for pipeline flow calculations, pump sizing, and heat exchanger design.
Measures crude oil and refined product viscosity in cSt for pipeline transport and refinery design.
Selects hydraulic fluids based on kinematic viscosity in cSt for pump compatibility and system efficiency.
Characterizes food product viscosity (honey, sauces, oils) in cSt for process design and quality control.
Uses ft²/s or cSt for atmospheric kinematic viscosity in Reynolds number calculations for aircraft design.
Square centimeter per second (cm²/s) equals exactly 1 Stokes — the CGS unit of kinematic viscosity. The equivalence cm²/s = St makes this unit important in older fluid mechanics literature and some industrial applications.
cm²/s = St is used in petroleum engineering viscometers, some lubricant standards, and pre-SI fluid mechanics texts. Water at 20°C = 0.01 cm²/s = 0.01 St = 1 cSt. Honey ≈ 500–10,000 cSt = 5–100 cm²/s.
Interesting fact: The Stokes unit is named after Sir George Gabriel Stokes, the Irish physicist who derived Stokes' Law (1851) describing the drag force on a sphere moving through a viscous fluid — the foundational equation for falling-sphere viscometers still used today.
Square foot per second (ft²/s) is the Imperial kinematic viscosity unit, equal to 0.0929 m²/s = 929 St. It is used in US aerospace and some civil engineering contexts where the foot-pound-second system is standard.
ft²/s appears in some US military fluid specifications and older aerospace engineering handbooks. Water at 20°C ≈ 1.075×10⁻⁵ ft²/s. Air ≈ 1.57×10⁻⁴ ft²/s. The large scaling factor (1 ft²/s = 929 St) makes it impractical for most engineering use.
Interesting fact: The kinematic viscosity of the atmosphere at different altitudes is important for aircraft design — Reynolds number calculations use kinematic viscosity. The US Standard Atmosphere tables list kinematic viscosity in ft²/s at each altitude for use in US aerospace engineering.
Kinematic viscosity (ν = μ/ρ) measures how a fluid flows under gravity. The cSt is dominant in industry; m²/s is the SI unit; St and cm²/s are the CGS equivalents. Key anchor: water at 20°C ≈ 1 cSt = 10⁻⁶ m²/s = 0.01 St.
Exact factor: 1 cm²/s = 0.001076 ft²/s. Reverse: 1 ft²/s = 929 cm²/s.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.