Pendulum Simulator
Swing several pendulums at once and discover what really sets their rhythm: length, gravity and how far you pull them back.
This is a real nonlinear pendulum, integrated with RK4 — not the small-angle shortcut. Pick a preset or tap a bob to read its length, gravity, period and frequency in real units, and see how the true period grows for big swings.
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Tap a bob to inspect its length, gravity, period and frequency.
Presets
Selected pendulum
Tap a bob to inspect its length, gravity, period and frequency.
Formulas & sources
T = 2π√(L/g)
θ″ = −(g/L)·sin θ
T = 4√(L/g)·K(sin(θ₀/2))
g₀ = 9.80665 m/s²