Convert Stokes to Square feet per second
Instantly convert Stokes (St) to Square feet per second (ft²/s) with our free online calculator.
Formula: St to ft²/s — multiply by 0.00107639
Reference Table
| Stokes (St) | Square feet per second (ft²/s) |
|---|---|
| 1 | 0.00107639 |
| 5 | 0.00538196 |
| 10 | 0.0107639 |
| 25 | 0.0269098 |
| 50 | 0.0538196 |
| 100 | 0.107639 |
How to Convert Stokes to Square feet per second
Formula
To convert Stokes (St) to Square feet per second (ft²/s): multiply by 0.00107639
Step-by-Step
- Start with your value in Stokes (St).
- Multiply by 0.00107639 to perform the conversion.
- The result is your value expressed in Square feet per second (ft²/s).
Conversion Factor
1 St = 0.00107639 ft²/s
Reverse Factor
1 ft²/s = 929.03 St
Worked Example
Convert 25 Stokes to Square feet per second: 25 St = 0.0269098 ft²/s
About Stoke (St)
The CGS unit of kinematic viscosity equal to exactly 1 cm²/s (= 100 cSt = 10⁻⁴ m²/s). Named after Irish mathematician Sir George Gabriel Stokes, whose 1851 paper 'On the Effect of the Internal Friction of Fluids on the Motion of Pendulums' (Cambridge Phil. Trans.) established the laminar-drag formula F = 6πμrv (Stokes' law) — still the basis for terminal-velocity calculations for sedimenting particles, atmospheric aerosol settling rates, and laboratory particle-sizing techniques (Stokes diameter). The stoke as a unit is occasionally used directly for highly viscous fluids in geophysics and glass science where typical values are large enough that cSt would have many leading zeros: basaltic lava 10² to 10⁴ St at eruption temperature, granitic / rhyolitic lava 10⁹ to 10¹¹ St, the asthenosphere of Earth's mantle 10¹⁸ to 10²⁰ St, the lower mantle 10²² St, glass at the working point ~10⁴ St.
About Square foot per second (ft²/s)
An imperial unit of kinematic viscosity equal to ≈ 0.092903 m²/s = 92,903 cSt per NIST SP 811. Ft²/s is a very large unit — appropriate for gaseous and highly mobile fluids but unwieldy for common liquids (water at 20 °C is only 1.08 × 10⁻⁵ ft²/s, which is essentially zero on a normal scale). Primarily encountered in: pre-1990s US-edition fluid-mechanics textbooks (Streeter, Roberson-Crowe, Olson) where the entire problem set is in lb-ft-s units to keep dimensional analysis clean; older US petroleum engineering pipeline-flow literature; and some US Bureau of Reclamation hydraulics publications. Reference values: air at 60 °F ~1.6 × 10⁻⁴ ft²/s; standard atmospheric air at 32,000 ft (jetliner cruise altitude) ~5.5 × 10⁻⁴ ft²/s. Convert ft²/s to m²/s by multiplying by 0.0929; to cSt by multiplying by 92,903.
Quick Facts
- 1 Stoke equals 0.00107639 Square feet per second
- 1 Square foot per second equals 929.03 Stokes
- Stoke is a unit of kinematic viscosity
- Square foot per second is a unit of kinematic viscosity
- This conversion is commonly used in fluid flow analysis, lubrication engineering, and process design
- The Stoke belongs to the metric system
- The Square foot per second belongs to the imperial system
Common Stoke to Square foot per second Conversions
| Stokes (St) | Square feet per second (ft²/s) |
|---|---|
| 0.01 | 0.0000107639 |
| 0.1 | 0.000107639 |
| 0.25 | 0.000269098 |
| 0.5 | 0.000538196 |
| 1 | 0.00107639 |
| 2 | 0.00215278 |
| 3 | 0.00322917 |
| 5 | 0.00538196 |
| 10 | 0.0107639 |
| 15 | 0.0161459 |
| 20 | 0.0215278 |
| 25 | 0.0269098 |
| 50 | 0.0538196 |
| 75 | 0.0807294 |
| 100 | 0.107639 |
| 250 | 0.269098 |
| 500 | 0.538196 |
| 1000 | 1.07639 |
| 5000 | 5.38196 |
| 10000 | 10.7639 |
Understanding Stokes
The Stoke (symbol: St) is a unit of kinematic viscosity. The CGS unit of kinematic viscosity equal to exactly 1 cm²/s (= 100 cSt = 10⁻⁴ m²/s). Named after Irish mathematician Sir George Gabriel Stokes, whose 1851 paper 'On the Effect of the Internal Friction of Fluids on the Motion of Pendulums' (Cambridge Phil. Trans.) established the laminar-drag formula F = 6πμrv (Stokes' law) — still the basis for terminal-velocity calculations for sedimenting particles, atmospheric aerosol settling rates, and laboratory particle-sizing techniques (Stokes diameter). The stoke as a unit is occasionally used directly for highly viscous fluids in geophysics and glass science where typical values are large enough that cSt would have many leading zeros: basaltic lava 10² to 10⁴ St at eruption temperature, granitic / rhyolitic lava 10⁹ to 10¹¹ St, the asthenosphere of Earth's mantle 10¹⁸ to 10²⁰ St, the lower mantle 10²² St, glass at the working point ~10⁴ St.
It belongs to the metric measurement system.
Stokes are commonly used in fluid flow analysis, lubrication engineering, and process design.
Understanding Square feet per second
The Square foot per second (symbol: ft²/s) is a unit of kinematic viscosity. An imperial unit of kinematic viscosity equal to ≈ 0.092903 m²/s = 92,903 cSt per NIST SP 811. Ft²/s is a very large unit — appropriate for gaseous and highly mobile fluids but unwieldy for common liquids (water at 20 °C is only 1.08 × 10⁻⁵ ft²/s, which is essentially zero on a normal scale). Primarily encountered in: pre-1990s US-edition fluid-mechanics textbooks (Streeter, Roberson-Crowe, Olson) where the entire problem set is in lb-ft-s units to keep dimensional analysis clean; older US petroleum engineering pipeline-flow literature; and some US Bureau of Reclamation hydraulics publications. Reference values: air at 60 °F ~1.6 × 10⁻⁴ ft²/s; standard atmospheric air at 32,000 ft (jetliner cruise altitude) ~5.5 × 10⁻⁴ ft²/s. Convert ft²/s to m²/s by multiplying by 0.0929; to cSt by multiplying by 92,903.
It belongs to the imperial measurement system.
Square feet per second are commonly used in fluid flow analysis, lubrication engineering, and process design.
Why Convert Stokes to Square feet per second?
Converting between Stokes and Square feet per second is a frequent requirement for engineers, scientists, and students working with kinematic viscosity values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate kinematic viscosity conversion is essential.
Frequently Asked Questions
How do I convert Stokes to Square feet per second?
The CGS unit of kinematic viscosity equal to exactly 1 cm²/s (= 100 cSt = 10⁻⁴ m²/s). To convert Stokes to Square feet per second, multiply by 0.00107639. For example, 25 St equals 0.0269098 ft²/s.
How many Square feet per second are in 1 Stoke?
There are 0.00107639 Square feet per second in 1 Stoke.
How many Stokes are in 1 Square foot per second?
There are 929.03 Stokes in 1 Square foot per second.
What is the formula for Stoke to Square foot per second conversion?
The formula is: multiply by 0.00107639. This means 1 St = 0.00107639 ft²/s.
Is a Stoke bigger than a Square foot per second?
Yes. One Stoke is larger than one Square foot per second because 1 St equals 0.00107639 ft²/s, which is less than 1.
When do you need to convert between Stokes and Square feet per second?
An imperial unit of kinematic viscosity equal to ≈ 0. Stoke and Square foot per second are both kinematic viscosity units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.