Doppler Effect Calculator

Calculate the frequency shift due to relative motion between source and observer

Source Frequency (Hz):

Wave Speed (m/s):

Source Velocity (m/s):

Observer Velocity (m/s):

Default wave speed is for sound in air (343 m/s). Use positive velocities for approach, negative for recession.

f' = f₀ × (v + v_observer) / (v - v_source)

Where: f' = observed frequency, f₀ = source frequency, v = wave speed