How do I get travel time per foot?

Divide 60 by the measured belt speed in feet per minute. Time a belt mark past two points a known distance apart to confirm the number.

Why add an allowance if the length math is exact?

Because the layout still needs takeup travel, end rolls and clearance around the zone. Keeping it as a visible percent is easier to review than a fudged zone length.

Does zone length include the product?

It is the travel the product makes from leading edge in to leading edge out. Use that travel, not the physical frame length of the conveyor.

Can I shorten the zone by running faster?

Faster running cuts dwell. A zone sized for 90 seconds at 14 fpm gives about 42 seconds at 30 fpm, so check the process window before speeding up.

Conveyors calculator

Conveyor Length From Dwell Requirement Calculator

Size the conveyor that gives a product its dwell time. Enter the dwell, the travel time per foot, the layout allowance and the feet available.

What this calculator does

Conveyor length a dwell requirement needs at a given travel rate, checked against the layout space.

Formula used

Base length = required product dwell ÷ travel time per foot
Required conveyor length = base length × (1 + extra layout allowance % ÷ 100)
Length headroom = available layout length − required conveyor length
Required length is defined only while travel time per foot is above zero

Inputs explained

Required Product Dwell: Seconds the product must spend inside the process zone.
Travel Time per Conveyor Foot: Seconds the product takes to travel one conveyor foot.
Extra Layout Length Allowance: Percent added to the base length for takeups and layout.
Available Layout Length: Feet the layout can give this conveyor.

How to use the result

Best suited to sizing an oven or cooling zone, fitting a process zone into a fixed footprint, checking a zone after a speed change.
A constant speed zone; ramps and starts can change the real dwell. One product length and one speed; a mix needs its longest dwell checked.

Current U.S. benchmarks

The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

How do I get travel time per foot? Divide 60 by the measured belt speed in feet per minute. Time a belt mark past two points a known distance apart to confirm the number.
Why add an allowance if the length math is exact? Because the layout still needs takeup travel, end rolls and clearance around the zone. Keeping it as a visible percent is easier to review than a fudged zone length.
Does zone length include the product? It is the travel the product makes from leading edge in to leading edge out. Use that travel, not the physical frame length of the conveyor.
Can I shorten the zone by running faster? Faster running cuts dwell. A zone sized for 90 seconds at 14 fpm gives about 42 seconds at 30 fpm, so check the process window before speeding up.

Last reviewed 2026-10-01.