🚀 Tsiolkovsky Rocket Equation

Calculate the delta-V of any rocket — from model to orbital

Δv = I_sp · g₀ · ln( M₀ / M₁ )

Δv — velocity change (m/s) | I_sp — specific impulse (s)
g₀ = 9.807 m/s² | M₀ — wet mass | M₁ — dry mass

Input Parameters

Propellant Type

Specific Impulse, I_sp (seconds)

Wet Mass, M₀ — with propellant (kg)

Dry Mass, M₁ — without propellant (kg)

—

m/s

Delta-V

—

km/h

Delta-V

—

mass ratio

M₀ / M₁

—

% of total mass

Propellant

Propellant fraction —