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Flywheel Rotational Kinetic Energy from Mass, Radius, and RPM Calculator

Energy stored in a spinning flywheel (solid disc).

Calculates the kinetic energy stored in a solid-disc flywheel: KE_rot = ½·I·ω² = ¼·m·r²·ω², where ω = 2π·RPM/60.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

kg
m
rpm

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

KE = ¼·m·r²·(2π·RPM/60)²

In depth

Calculates the kinetic energy stored in a solid-disc flywheel: KE_rot = ½·I·ω² = ¼·m·r²·ω², where ω = 2π·RPM/60.