Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Square millimetres per second to Stokes
Convert mm²/s to St instantly, then review the formula, assumptions, and rounding guidance.
ViscosityInstant result
Decimals
Formula result = input × 0.000001 ÷ 0.0001. 1 mm²/s = 0.01 St
Common examples
One value, several units
Square metres per second0 m²/s
Stokes0.01 St
Centistokes1 cSt
Square feet per second0 ft²/s
Conversion table
| mm²/s | St |
|---|---|
| 1 mm²/s | 0.01 St |
| 2 mm²/s | 0.02 St |
| 5 mm²/s | 0.05 St |
| 10 mm²/s | 0.1 St |
| 25 mm²/s | 0.25 St |
| 50 mm²/s | 0.5 St |
| 100 mm²/s | 1 St |
Conversion chart
1 mm²/s0.01 St
5 mm²/s0.05 St
10 mm²/s0.1 St
25 mm²/s0.25 St
50 mm²/s0.5 St
Worked example
1 cSt equals 1 mm²/s.
Unit definition
Square millimetres per second (mm²/s) One square millimetres per second equals 0.000001 square metre per second.
Unit history
Square millimetres per second 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 mm²/s to square metre per second.
3. Convert the base value to St and apply your display precision.
Understand the result before using it
Square millimetres per second to Stokes converts a value measured in Square millimetres per second (mm²/s) into the equivalent value in Stokes (St). 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 × 0.000001 ÷ 0.0001
Assumptions
- Square millimetres per second and Stokes represent the same kinematic viscosity quantity.
- The input is expressed in mm²/s; the output is expressed in St.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 mm²/s = 0.01 St. 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 mm²/s measurement in a document that expects St.
- Compare a square millimetres per second value with a value reported in stokes.
- Check the mm²/s-to-St 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 Square millimetres per second to Stokes?
result = input × 0.000001 ÷ 0.0001 Using the displayed relationship, 1 mm²/s equals 0.01 St.
How many Stokes are in one Square millimetres per second?
One Square millimetres per second is 0.01 Stokes. The displayed digits may be rounded.
Can I reverse the mm²/s to St conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts St back to mm²/s.
Is the Square millimetres per second to Stokes 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.