Conveyor Belt Length Calculator
Need a replacement conveyor belt but not sure of the length? Enter your pulley diameters and center distance below to get the belt length to order. Belting is cut to length and ships from our Houston warehouse. Complex conveyor? Send us the numbers and we will quote it.
Results are inside circumference, the industry ordering convention. Verify critical dimensions before ordering or call (888) 203-2358.
Advanced: extra rollers, take-up position
Request a Quote
Send us your numbers and we quote the right belting, cut to length, from our Houston warehouse. Your calculation is attached automatically.
How to measure your conveyor belt
Lay the old belt flat with no tension and measure end to end. For cut to length laced belting, that measurement is your order length. Ordering endless? Send us the flat length and belt thickness and we convert it to the endless spec. If your take-up was near the end of its travel, say so. A stretched belt is worth ordering short.
No belt or a complex path? Run a non-stretch string around the full belt path, mark the overlap, and measure the string. Best for conveyors with snub rollers and take-up loops.
What this calculator automates: pulley diameters plus center distance. Measure with the take-up at 25 to 30 percent of its travel so most of the range remains for tensioning.
Frequently asked questions
How do I measure conveyor belt length without removing the belt?
Run a non-stretch string around the full belt path, mark the overlap, and measure the string. Or measure the pulley diameters and center distance and use the calculator above. Set the take-up at about 25 to 30 percent of its travel before measuring.
How much extra belt should I order for lacing or splicing?
For laced belting, order the measured length plus a few inches for squaring the ends. For a field vulcanized splice, add one splice allowance per splice. A fabric step splice typically runs 1 to 3 feet depending on belt width and ply count. Confirm the splice length with your splice crew before ordering.
Where should the take-up be when I measure my conveyor?
At about 25 to 30 percent of its total travel. That leaves the rest of the range to tension the belt as it stretches in service. If your take-up is maxed out, the old belt has stretched past adjustment, so use the calculator or the string method instead of measuring the old belt.
What angle can a conveyor belt incline before product slips?
It depends on the product and the belt surface. Smooth belts handle roughly 15 to 20 degrees. Rough top belting works to about 25 to 30 degrees. Cleated and steep grade belting reaches 45 degrees. Above that, sidewall belting or a different conveyor design is required. Wet or rounded products slip at lower angles.
How long is the belt on a roll?
Use the Roll Length tab above. Multiply pi by the roll outside diameter squared minus the core diameter squared, then divide by 4 times the belt thickness. That gives inches, so divide by 12 for feet. A 40 inch roll on an 8 inch core with 0.25 inch belt holds about 400 feet.