Circular Orbit
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Calculate circular-orbit properties around a common central body or your own reference body. Use Hohmann, vis-viva, or maneuver tools when the orbit is elliptical or changing.
Orbital Velocity
7.672 km/s / 4.767 mi/s
Orbital Period
01:32:25
Orbit Size
400.0 km altitude, 6,771.0 km radius
Escape / Mean Motion
10.851 km/s escape, 15.582 rev/day
Central Body
Earth: R = 6,371.0 km, μ = 3.9859e+14 m³/s²
Circular orbit geometry
Hover or tap the orbit or body for local values.
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.