Centrifugal Force Calculator

Spin faster, know the load before failure. Choose inputs: speed, radius, mass, or weight anytime. Get clear force results, then download reports quickly today.

What this calculator returns
It computes the force needed to keep a mass moving in a circle: F = m·v²/r = m·ω²·r. Commonly called “centrifugal force”.
Pick the unknown variable you want.
Choose how you want to enter speed.
Weight uses your chosen gravity value.
Must be positive for force/speed/radius solutions.
Mass is computed as m = W/g.
m/s²
Default: 9.80665 m/s².
Distance from rotation axis to the mass.
Units list changes with speed type.
Needed when solving for speed, radius, or mass.

Formula used

For uniform circular motion, the inward force needed to keep an object moving on a circle is:

  • F = m · v² / r where v is tangential speed.
  • F = m · ω² · r where ω is angular speed (rad/s).
  • ω = 2π · RPM / 60 and v = ω · r.

This magnitude is often labeled “centrifugal force” in rotating frames, but it matches the required centripetal force needed for the circular path.

How to use this calculator

  1. Select what you want to solve for: force, speed, radius, or mass.
  2. Choose your speed input type: RPM, ω, or tangential speed.
  3. Enter the known values and their units (mass or weight, radius, etc.).
  4. Click Calculate to see results and derived metrics.
  5. Use the download buttons to export CSV or PDF reports.

Example data table

Case Mass (kg) Radius (m) Speed (RPM) Force (N) g-force