How is Hohmann transfer delta-v calculated?

The calculator uses the classical two-impulse Hohmann transfer equations between two circular orbit radii around the selected central body. It reports delta-v1, delta-v2, total delta-v, and transfer time.

Which ISA layers are used?

The ISA model follows ICAO 7488 layer-based temperature lapse rates and computes pressure and density from hydrostatic equations across the 0-86 km range.

Aerospace Calculator – Orbital Mechanics, Kepler Orbit, Hohmann Transfer ΔV, ISA Atmosphere

Calculate orbital parameters from Keplerian or Cartesian inputs, estimate Hohmann transfer delta-v, and visualize 2D orbits. Includes ISA standard atmosphere (0-86 km) with temperature, pressure, density, speed of sound, Mach number, dynamic pressure, and drone thrust correction.

Aerospace Calculator Overview

This tool combines orbital mechanics and ISA atmosphere calculations in one interface for aerospace, robotics, and drone workflows.

Orbital tab: Keplerian/Cartesian input, orbital period, periapsis/apoapsis altitude, circular/escape speed, Hohmann transfer ΔV, 2D orbit view.
Atmosphere tab: ISA 0-86 km with temperature, pressure, density, speed of sound, Mach number, dynamic pressure, and thrust correction ratio.
Unit toggles: km/mi for orbital distances and °C/K/°F for atmosphere temperature output.

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2D Orbit Preview

Zoom 1.00x

Drag to pan • Wheel to zoom • Reset to fit

Orbital Input Settings

Input Mode

Central Body

Distance Unit

Orbital Parameters

a (km)

i (deg)

Ω (deg)

ω (deg)

ν (deg)

Target orbit altitude (km)

Orbital Result

Orbital Period

5553.62 s

01:32:34

Periapsis / Apoapsis Alt.

395.933 km / 404.067 km

Average Orbital Speed

7.66856 km/s

Current Radius

6775.260 km

Escape / Circular Speed @ r

10.84728 km/s / 7.67019 km/s

Anomalies (E / M)

44.9757° / 44.9514°

Newton-Raphson iterations: 2

Orbital Elements

a=6778.137000 km, e=0.00060000, i=51.64000°, Ω=0.00000°, ω=0.00000°, ν=45.00000°

Hohmann Transfer (circular radius from a to target altitude)

Target altitude: 35786.000 km | ΔV₁=2.397473 km/s, ΔV₂=1.456487 km/s, Total ΔV=3.853959 km/s, Transfer time=05:17:29