Orbital Mechanics Calculators — Astronomy
Orbit and mission design: delta-v budgets, Hohmann transfers, Lagrange points, satellite speed, and the Roche limit. Delta-v, not distance, is the real measure of how hard a destination is to reach.
All Orbital Mechanics Calculators
Calculate the total delta-v budget needed for a space mission between two bodies.
Calculate delta-v requirements for a Hohmann transfer orbit between two circular orbits.
Calculate the locations of the five Lagrange points for a two-body gravitational system.
Calculate the Roche limit — the minimum distance before a satellite is torn apart by tidal forces.
Calculate the orbital speed of a satellite at any altitude above Earth.
Calculate the Schwarzschild radius (event horizon) of a black hole from its mass.
About Orbital Mechanics Calculators
Orbit and mission design: delta-v budgets, Hohmann transfers, Lagrange points, satellite speed, and the Roche limit. Delta-v, not distance, is the real measure of how hard a destination is to reach.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common orbital mechanics scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 6 tools: Delta V Budget Calculator, Hohmann Transfer Calculator, Lagrange Point Calculator, Roche Limit Calculator, Satellite Speed Calculator, Schwarzschild Radius Calculator. Each calculator is free to use with no signup required.