Stokes Law Calculators

➤ Calculate Terminal Velocity (Fall Velocity or Settling Velocity)
➤ Calculate Acceleration Of Gravity
➤ Calculate Diameter Of a Particle
➤ Calculate Density Of Medium
➤ Calculate Density Of Particle
➤ Calculate Viscosity Of Medium

Calculate Terminal Velocity (Fall Velocity or Settling Velocity)

$V=[g×D^2×(d_p-d_m)]/[18×V]$
V = Terminal Velocity ---- D = Diameter Of a Particle
g = Acceleration Of Gravity ---- v = Viscosity Of Medium
d_p = Density Of Particle ---- d_m = Density Of Medium

Enter your values:

Acceleration Of Gravity:

Diameter Of a Particle:

Density Of Particle:

Density Of Medium:

Viscosity Of Medium:

Result:

Terminal Velocity:

Meter/Second

Calculate Acceleration Of Gravity

$g=[18×v×V]/[D^2×(d_p-d_m)]$
g = Acceleration Of Gravity ---- V = Terminal Velocity
v = Viscosity Of Medium ---- D = Diameter Of a Particle
d_p = Density Of Particle ----d_m = Density Of Medium

Enter your values:

Terminal Velocity:

Diameter Of a Particle:

Density Of Particle:

Density Of Medium:

Viscosity Of Medium:

Result:

Acceleration Of Gravity:

Meter/Second²

Calculate Diameter Of a Particle

$D=√[18×v×V]/[g×(d_p-d_m)]$
D = Diameter Of a Particle ---- V = Terminal Velocity
v = Viscosity Of Medium ---- g = Acceleration Of Gravity
d_p = Density Of Particle ----d_m = Density Of Medium

Enter your values:

Viscosity Of Medium:

Terminal Velocity:

Acceleration Of Gravity:

Density Of Particle:

Density Of Medium:

Result:

Diameter Of a Particle:

Meter

Calculate Density Of Medium

$d_m=d_p-[18×v×V]/[g×D^2]$
d_m = Density Of Medium ---- d_p = Density Of Particle
V = Terminal Velocity ---- v = Viscosity Of Medium
D = Diameter Of a Particle ---- g = Acceleration Of Gravity

Enter your values:

Density Of Particle:

Viscosity Of Medium:

Terminal Velocity:

Acceleration Of Gravity:

Diameter Of a Particle:

Result:

Density Of Medium:

Gram/Meter³

Calculate Density Of Particle

$d_p=[18×v×V]/[g×D^2]+d_m$
d_p = Density Of Particle ---- d_m = Density Of Medium
V = Terminal Velocity ---- v = Viscosity Of Medium
D = Diameter Of a Particle ---- g = Acceleration Of Gravity

Enter your values:

Density Of Medium:

Viscosity Of Medium:

Terminal Velocity:

Acceleration Of Gravity:

Diameter Of a Particle:

Result:

Density Of Particle:

Gram/Meter³

Calculate Viscosity Of Medium

$V=[g×D^2×(d_p-d_m)]/[18×V]$
v = Viscosity Of Medium ---- d_p = Density Of Particle
d_m = Density Of Medium ---- D = Diameter Of a Particle
g = Acceleration Of Gravity ---- V = Terminal Velocity

Enter your values:

Acceleration Of Gravity:

Diameter Of a Particle:

Density Of Particle:

Density Of Medium:

Terminal Velocity:

Result:

Viscosity Of Medium:

Gram/Meter-Second

What is a Stokes' Law Calculator?

A Stokes' Law Calculator is a tool used to determine the terminal velocity of a small spherical particle moving through a viscous fluid. It is based on Stokes' Law, which describes the drag force experienced by spherical objects in a fluid at low Reynolds numbers.

Why Use a Stokes' Law Calculator?

A Stokes' Law Calculator is useful for:

Predicting the settling velocity of particles in fluids (e.g., sedimentation in water treatment, blood cell movement).
Designing separation processes in chemical and environmental engineering.
Studying fluid mechanics in physics and engineering.
Understanding aerosol and colloid behavior in atmospheric science.

How Does a Stokes' Law Calculator Work?

Input Values: The user enters the particle radius, densities of the particle and fluid, fluid viscosity, and gravitational acceleration.
Computation: The calculator applies Stokes' Law to compute the terminal velocity.
Output: The result is the velocity at which the particle settles in the fluid under gravity.

Online tools or software like MATLAB, Python, and Excel can also be used for these calculations.

When to Use a Stokes' Law Calculator?

When analyzing sedimentation rates in fluid systems (e.g., wastewater treatment).
When designing industrial separation processes like centrifugation and filtration.
In meteorology, to study how small particles (e.g., dust, droplets) move in the atmosphere.
In biophysics, to calculate the motion of cells in blood or other biological fluids.

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About This Calculator

Created at 2024/11/1

Updated :

2025/03/20

Views :

205721

Author:

Roderick

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Stokes Law Calculators

Calculate Terminal Velocity (Fall Velocity or Settling Velocity)

$V=[g×D^2×(d_p-d_m)]/[18×V]$
V = Terminal Velocity ---- D = Diameter Of a Particle
g = Acceleration Of Gravity ---- v = Viscosity Of Medium
d_p = Density Of Particle ---- d_m = Density Of Medium

Enter your values:

Result:

Calculate Acceleration Of Gravity

$g=[18×v×V]/[D^2×(d_p-d_m)]$
g = Acceleration Of Gravity ---- V = Terminal Velocity
v = Viscosity Of Medium ---- D = Diameter Of a Particle
d_p = Density Of Particle ----d_m = Density Of Medium

Enter your values:

Result:

Calculate Diameter Of a Particle

$D=√[18×v×V]/[g×(d_p-d_m)]$
D = Diameter Of a Particle ---- V = Terminal Velocity
v = Viscosity Of Medium ---- g = Acceleration Of Gravity
d_p = Density Of Particle ----d_m = Density Of Medium

Enter your values:

Result:

Calculate Density Of Medium

$d_m=d_p-[18×v×V]/[g×D^2]$
d_m = Density Of Medium ---- d_p = Density Of Particle
V = Terminal Velocity ---- v = Viscosity Of Medium
D = Diameter Of a Particle ---- g = Acceleration Of Gravity

Enter your values:

Result:

Calculate Density Of Particle

$d_p=[18×v×V]/[g×D^2]+d_m$
d_p = Density Of Particle ---- d_m = Density Of Medium
V = Terminal Velocity ---- v = Viscosity Of Medium
D = Diameter Of a Particle ---- g = Acceleration Of Gravity

Enter your values:

Result:

Calculate Viscosity Of Medium

$V=[g×D^2×(d_p-d_m)]/[18×V]$
v = Viscosity Of Medium ---- d_p = Density Of Particle
d_m = Density Of Medium ---- D = Diameter Of a Particle
g = Acceleration Of Gravity ---- V = Terminal Velocity

Enter your values:

Result:

What is a Stokes' Law Calculator?

Why Use a Stokes' Law Calculator?

How Does a Stokes' Law Calculator Work?

When to Use a Stokes' Law Calculator?

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Stokes Law Calculators

Calculate Terminal Velocity (Fall Velocity or Settling Velocity)

V=g×D2×(dp-dm)18×VV=[g×D^2×(d_p-d_m)]/[18×V] V = Terminal Velocity ---- D = Diameter Of a Particle g = Acceleration Of Gravity ---- v = Viscosity Of Medium dp = Density Of Particle ---- dm = Density Of Medium

Enter your values:

Result:

Calculate Acceleration Of Gravity

g=18×v×VD2×(dp-dm)g=[18×v×V]/[D^2×(d_p-d_m)] g = Acceleration Of Gravity ---- V = Terminal Velocity v = Viscosity Of Medium ---- D = Diameter Of a Particle dp = Density Of Particle ----dm = Density Of Medium

Enter your values:

Result:

Calculate Diameter Of a Particle

D=√18×v×Vg×(dp-dm)D=√[18×v×V]/[g×(d_p-d_m)] D = Diameter Of a Particle ---- V = Terminal Velocity v = Viscosity Of Medium ---- g = Acceleration Of Gravity dp = Density Of Particle ----dm = Density Of Medium

Enter your values:

Result:

Calculate Density Of Medium

dm=dp-18×v×Vg×D2d_m=d_p-[18×v×V]/[g×D^2] dm = Density Of Medium ---- dp = Density Of Particle V = Terminal Velocity ---- v = Viscosity Of Medium D = Diameter Of a Particle ---- g = Acceleration Of Gravity

Enter your values:

Result:

Calculate Density Of Particle

dp=18×v×Vg×D2+dmd_p=[18×v×V]/[g×D^2]+d_m dp = Density Of Particle ---- dm = Density Of Medium V = Terminal Velocity ---- v = Viscosity Of Medium D = Diameter Of a Particle ---- g = Acceleration Of Gravity

Enter your values:

Result:

Calculate Viscosity Of Medium

V=g×D2×(dp-dm)18×VV=[g×D^2×(d_p-d_m)]/[18×V] v = Viscosity Of Medium ---- dp = Density Of Particle dm = Density Of Medium ---- D = Diameter Of a Particle g = Acceleration Of Gravity ---- V = Terminal Velocity

Enter your values:

Result:

What is a Stokes' Law Calculator?

Why Use a Stokes' Law Calculator?

How Does a Stokes' Law Calculator Work?

When to Use a Stokes' Law Calculator?

Did this Calculator help you?

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About This Calculator

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$V=[g×D^2×(d_p-d_m)]/[18×V]$
V = Terminal Velocity ---- D = Diameter Of a Particle
g = Acceleration Of Gravity ---- v = Viscosity Of Medium
d_p = Density Of Particle ---- d_m = Density Of Medium

$g=[18×v×V]/[D^2×(d_p-d_m)]$
g = Acceleration Of Gravity ---- V = Terminal Velocity
v = Viscosity Of Medium ---- D = Diameter Of a Particle
d_p = Density Of Particle ----d_m = Density Of Medium

$D=√[18×v×V]/[g×(d_p-d_m)]$
D = Diameter Of a Particle ---- V = Terminal Velocity
v = Viscosity Of Medium ---- g = Acceleration Of Gravity
d_p = Density Of Particle ----d_m = Density Of Medium

$d_m=d_p-[18×v×V]/[g×D^2]$
d_m = Density Of Medium ---- d_p = Density Of Particle
V = Terminal Velocity ---- v = Viscosity Of Medium
D = Diameter Of a Particle ---- g = Acceleration Of Gravity

$d_p=[18×v×V]/[g×D^2]+d_m$
d_p = Density Of Particle ---- d_m = Density Of Medium
V = Terminal Velocity ---- v = Viscosity Of Medium
D = Diameter Of a Particle ---- g = Acceleration Of Gravity

$V=[g×D^2×(d_p-d_m)]/[18×V]$
v = Viscosity Of Medium ---- d_p = Density Of Particle
d_m = Density Of Medium ---- D = Diameter Of a Particle
g = Acceleration Of Gravity ---- V = Terminal Velocity