Astronomy & Earth Science
Earthquake Magnitude Calculator
Lets users compute and verify earthquake magnitude instantly with formula, steps and examples — no manual math.
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Amplitude ratio
10 ×
A magnitude 6 quake has 10.0× the amplitude and 31.6× the energy of a magnitude 5.
Energy ratio
31.6228 ×
About this calculator
The Richter/moment scale is logarithmic: each whole step = 10× ground amplitude and ~31.6× (10^1.5) energy. A magnitude 7 releases ~1000× the energy of a magnitude 5.
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