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`r = (v*T)/(2*pi) `

0.159154943091895

The **Radius from Speed and Period** calculator computes the orbital radius based on the speed and period.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**V**) This is the orbital speed. - (
**T**) This is the orbital period.

**Orbital Radius (r):** The calculator returns the radius in kilometers. However, this can be automatically converted to compatible units via the pull-down menu.

The formula for the orbital radius from speed and period is:

r = (V•T)/(2π)

where:

- r = Orbital Radius
- V = Orbital Velocity
- T = Orbital Period

- Kepler's 3
^{rd}Law formula T² = (4π • R³)/(G • M) - Small Angle Formula
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