⚠ Origin and destination are the same node — change the mode or body.
// DETAILED HOHMANN CALCULATOR
Rocket Builder
Capsule, crew, batteries, instruments, rover, etc. Do not include engines or tank mass — those go in each stage below.
KSP Aerocalc
To calculate aerobraking precisely — how much your apoapsis will drop each pass, what periapsis you need, and how many passes to take — there's a dedicated community tool:
KSP Aerocalc by alterbaron Recommended on the official game wiki · Runs in browser
Enter your current orbit, the target body, and your desired apoapsis — it tells you exactly what periapsis to set.
Reentry calculator — Kerbin▶
// Reentry periapsis calculator
Enter the values shown in your KSP orbital map.
Uses the typical apoapsis for the visited body as a reference.
The km shown are the typical arrival apoapsis when entering the target body's SOI.