Pulley Belt Tension Calculator

This JavaScript calculator computes required belt tension for belt-driven pulley power transmission systems.



(Drawn to scale)
Drawing Scale Factor:
Small Diameter (in):
Large Diameter (in):
Center Distance (in):

Small Pulley Contact Span: 154.79968034783866 deg

Power (W):
Small Pulley Rotational Speed (rad/s):

Small Pulley Tangential Force: 456.5425229076925 N (102.63484200943164 lbs)

Effective Friction Coefficient:

Required Tension: 616.1264918642783 N (138.5107453903065 lbs)
Slack Side Tension: 159.58396895658575 N (35.87590338087486 lbs)