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🚀 Delta-V Calculator

Calculate the change in velocity (delta-v) a rocket can achieve using the Tsiolkovsky rocket equation.

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What Delta-V Measures

Delta-v represents the total change in velocity a rocket can achieve by burning its propellant. It is the key metric used to plan orbital maneuvers and interplanetary missions.

The Rocket Equation

Δv = Isp × g₀ × ln(m₀/mf), where Isp is the engine’s specific impulse, g₀ is standard gravity (9.80665 m/s²), m₀ is the initial (wet) mass, and mf is the final (dry) mass after propellant is spent.

Note: this is a simplified single-stage estimate for general educational purposes and does not account for gravity losses, drag, or staging.

Last reviewed August 2026