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Physics

Circular Orbital Speed Calculator

Estimate speed in a circular orbit around a dominant mass.

SI units shown beside each fieldIdeal model explained below

Physical quantities

Runs on your device

CALCULATED QUANTITY

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter central mass, orbital radius.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Circular speed = √(GM/r); G = 6.67430 × 10⁻¹¹.

A WORKED EXAMPLE

Using central mass = 5.972e+24 kg, orbital radius = 7000000 m, the result is 7545.94684 m/s. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Common questions

Which inputs does this calculation need?

Estimate speed in a circular orbit around a dominant mass. Enter central mass in kg, orbital radius in m. The filled example is editable and is not a saved personal record.

How should I interpret the result?

An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Methodology maintained by ClarityKit. How these tools are built and checked.