Flywheel Energy Calculator

Inputs

View results
Choose the mass distribution model used for I.
Total rotating mass represented by the selected model.
kg
Flywheel outside diameter.
mm
Rotational speed.
rpm

Results

Default result
Edit inputs
Stored energy(E)
1.097kJ
Pass

stored rotational energy

Also computed

Mass moment of inertia(I)0.2

kg·m²

Rim speed(v)Pass20,940mm/s

check material stress separately

Angular speed(ω)104.7

rad/s

Method notes 3 notes
  • Rotational energy E = 1/2·I·ω², with I = 1/2·m·r² for the selected mass distribution.
  • A rim-heavy flywheel stores more energy than a solid disk with the same mass, outside diameter and RPM.
  • This is an energy and inertia estimate only. Flywheel burst stress, shaft attachment, balance and guarding need separate design checks.

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