Belt Tension Calculator

Calculate tight side, slack side, effective, and centrifugal belt tensions for power transmission.

The mechanical power to be transmitted by the belt drive system.
kW
Linear belt speed. Typically 5-25 m/s. Optimal around 15-20 m/s.
m/s
Rubber on steel: 0.25-0.35. Leather on steel: 0.3-0.5.
Contact angle on smaller pulley. 180 deg for equal pulleys, typically 120-180 deg.
degrees
Width of the flat belt for stress calculation.
mm

Results

Effective Tension (Te)-N
Tight Side Tension (T1)-N
Slack Side Tension (T2)-N
Tension Ratio (e^f*theta)-
Max Belt Stress-MPa
References: Shigley's Mechanical Engineering Design — Belt Drives, ISO 22.