Calculate the total velocity change potential of a rocket.
Rocket Parameters
s
kg
kg
Calculation Results
Enter masses to calculate Δv
About this calculator
Quick Reference
ΔvChange in velocity
IspSpecific Impulse (s)
g₀Standard Gravity (9.806 m/s²)
m₀Initial (wet) mass
m_fFinal (dry) mass
Overview
Delta-V (Δv) represents the total change in velocity a rocket can achieve by expending its fuel. It is the 'currency' of spaceflight, determining what orbits or destinations a spacecraft can reach.
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Pro Tips
Isp (Specific Impulse) measures engine efficiency; higher Isp means more Δv for the same fuel mass.
m0 is the initial mass of the rocket (including all fuel).
mf is the dry mass of the rocket (after the fuel for that stage is spent).
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Fun Facts
"To reach Low Earth Orbit (LEO) from Earth's surface, you need approximately 9,400 m/s of Δv."
"The Tsiolkovsky rocket equation shows that Δv depends on the logarithm of the mass ratio, meaning you get diminishing returns as you add more fuel."
