How we worked it out
Updated as you change the numbers.
- L ≈ 2C + π(D + d) ÷ 2 + (D − d)² ÷ 4C.
Method and assumptions
V-belts are sized by an effective or pitch length slightly different from the outside length; check the maker’s chart.
Questions
What belt length for 8 in and 3 in pulleys 15 in apart?
About 47.69 in.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.