Calculator Inputs and Outputs
Inputs
- Particle radius (m) — example: 0.0001
- Particle density (kg/m³) — example: 2500
- Fluid density (kg/m³) — example: 1000
- Dynamic viscosity (Pa·s) — example: 0.001
- Gravity (m/s²) — example: 9.80665
Results
- Stokes terminal velocity (m/s)
- Terminal velocity (mm/s)
- Direction
Formula used
Stokes terminal velocity = 2(ρp − ρf)gr²/(9μ), for creeping-flow conditions.
How to Use the Stokes Terminal Velocity Calculator
Enter the requested values, check the units and assumptions, then select Calculate Stokes Terminal Velocity. The built-in defaults provide a complete working example.
Formula
Stokes terminal velocity = 2(ρp − ρf)gr²/(9μ), for creeping-flow conditions.
Understanding the Results
The primary answer appears first. Supporting outputs show related quantities, conversions, dates, costs, ratios, or intermediate values. Calculations keep additional precision before display rounding.
Accuracy Tips
- Use measured values and consistent units.
- Review assumptions, rates, timing, and efficiency inputs.
- Recalculate after changing any condition.
Important Note
This tool provides an informational estimate. Confirm critical financial, medical, construction, scientific, tax, legal, or safety decisions with an appropriately qualified professional.
Calculation Standards
This tool uses documented formulas and high-precision internal values. Displayed results may be rounded for readability. Review the assumptions and verify important decisions with a qualified professional.
Read our calculation methodology