Revolution (rev)

Definition

One full turn — 360 degrees or 2π radians.

History

The revolution is simply one full turn, the most intuitive unit of angle, equal to 360 degrees or 2π radians. It matches the way rotating machines are described.

Where it is used

Revolutions describe rotation and gearing, and rotational speed is often given in revolutions per minute.

Typical uses include rotation, gearing.

Conversion pages

These pages convert revolution to or from another unit in angle.

No conversion pages use this unit yet.

Other Angle units

• Degree (°)
• Radian (rad)
• Gradian (gon)

Sources

• BIPM SI BIPM SI Brochure (2019); ISO 80000-3 (angle) · Dataset reviewed Nov 11, 2026