Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Stokes to Square feet per second
Convert St to ft²/s instantly, then review the formula, assumptions, and rounding guidance.
ViscosityInstant result
Decimals
Formula result = input × 0.0001 ÷ 0.09290304. 1 St = 0.0011 ft²/s
Common examples
One value, several units
Square metres per second0.0001 m²/s
Square millimetres per second100 mm²/s
Centistokes100 cSt
Square feet per second0.0011 ft²/s
Conversion table
| St | ft²/s |
|---|---|
| 1 St | 0.0011 ft²/s |
| 2 St | 0.0022 ft²/s |
| 5 St | 0.0054 ft²/s |
| 10 St | 0.0108 ft²/s |
| 25 St | 0.0269 ft²/s |
| 50 St | 0.0538 ft²/s |
| 100 St | 0.1076 ft²/s |
Conversion chart
1 St0.0011 ft²/s
5 St0.0054 ft²/s
10 St0.0108 ft²/s
25 St0.0269 ft²/s
50 St0.0538 ft²/s
Worked example
1 cSt equals 1 mm²/s.
Unit definition
Stokes (St) One stokes equals 0.0001 square metre per second.
Unit history
Stokes is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert St to square metre per second.
3. Convert the base value to ft²/s and apply your display precision.
Understand the result before using it
Stokes to Square feet per second converts a value measured in Stokes (St) into the equivalent value in Square feet per second (ft²/s). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 0.0001 ÷ 0.09290304
Assumptions
- Stokes and Square feet per second represent the same kinematic viscosity quantity.
- The input is expressed in St; the output is expressed in ft²/s.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 St = 0.00107639104167 ft²/s. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a St measurement in a document that expects ft²/s.
- Compare a stokes value with a value reported in square feet per second.
- Check the St-to-ft²/s arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Dynamic and kinematic viscosity are different quantities and require density to convert between each other.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Stokes to Square feet per second?
result = input × 0.0001 ÷ 0.09290304 Using the displayed relationship, 1 St equals 0.00107639104167 ft²/s.
How many Square feet per second are in one Stokes?
One Stokes is 0.00107639104167 Square feet per second. The displayed digits may be rounded.
Can I reverse the St to ft²/s conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts ft²/s back to St.
Is the Stokes to Square feet per second result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.