Orbital Velocity Calculator
Calculate circular orbital velocity, period, local gravity, and specific orbital energy around major bodies.
Open calculator →Aerospace Calculators
Aerospace and orbital-mechanics calculators for orbit velocity, transfer maneuvers, rocket delta-v, and vehicle analysis.
Every calculator below is a focused interface over an existing Neutron STEM Lab engineering engine. Use the standalone route for a fast result, then move into the linked workbench when the calculation becomes part of a larger design or simulation.
Hohmann Transfer Calculator
Calculate the two ideal burns, total delta-v, and transfer time for a coplanar circular-to-circular Hohmann transfer.
Open calculator →Rocket Equation Delta-V Calculator
Calculate ideal and net delta-v, mass ratio, propellant mass, and propellant fraction with the Tsiolkovsky rocket equation.
Open calculator →Continue into the full engineering workbenches
The standalone calculators are intentionally narrow. These linked workbenches use the same underlying engines while adding broader analysis, simulation, comparison, and design workflows.
Orbital Mechanics
Explore circular and elliptical orbits, vis-viva, transfer maneuvers, rendezvous, launch windows, escape energy, spheres of influence, J2 precession, and synchronous orbits.
Rocket Propulsion
Explore thrust, specific impulse, rocket delta-v, burn time, engine clusters, nozzle expansion, altitude performance, staging, propellant split, feed power, and thrust-time profiles.