Delta-V Calculator

About the Δv (Delta-V) Equation

The Tsiolkovsky rocket equation:

$$\Delta v = V_e \cdot \ln\left(\frac{m_0}{m_1}\right)$$

This describes how much velocity change (Δv) a rocket can achieve based on its mass and engine efficiency.

How to Use the Calculator

Select what you want to calculate from the dropdown. Enter the known values in the fields provided and hit "Calculate" to get results.

Use Cases

• Δv (Delta-V): Know how much velocity your rocket can gain—crucial for mission planning.
• Initial Mass (m₀): Estimate how heavy your rocket needs to be before burnout.
• Final Mass (m₁): Find the mass after fuel is consumed—essential for payload and stage planning.
• Exhaust Velocity (Vₑ): Useful when evaluating new engine types or fuel types.

Industry Applications

This equation is a backbone in astrodynamics, spacecraft propulsion design, mission planning, and evaluating trade-offs between fuel, payload, and engine efficiency.