Conveyor Speed Calculator
Calculate required belt speed for target throughput based on product size, spacing, and line efficiency.
About this calculator
This calculator finds the belt speed a conveyor needs to hit a target throughput, given the product's footprint on the belt. Product Pitch -- the effective length each item occupies on the belt, including its own length plus the minimum gap to the next item -- is Product Length plus Product Gap. Required Belt Speed is then Target Throughput multiplied by Product Pitch, divided by Line Efficiency: throughput (parts/min) equals belt speed divided by pitch, so solving for speed means multiplying the desired throughput by the pitch, then dividing by efficiency to compensate for downtime. Because efficiency divides into the calculation, a LOWER Line Efficiency actually requires a HIGHER belt speed -- a line that's only running 70% of the time needs to move faster while it IS running to still average the target throughput over a full shift.
Target Throughput and Line Efficiency both move Required Belt Speed by equal proportions -- a one percent change in either moves the required speed by about one percent, though the throughput slider spans a hundred times more range than the efficiency slider does. Product Gap changes Product Pitch (and therefore Required Belt Speed) directly, but Line Efficiency has no effect on Product Pitch at all -- the two calculations are independent of each other. Time Between Parts is reported twice: the running figure is Product Pitch divided by the belt speed -- how often a part actually reaches a fixed point while the belt is moving -- and the shift average is simply 60 divided by Target Throughput. The running figure is the shorter of the two by exactly the Line Efficiency factor, and it is the one to size a downstream robot or reject gate to.
Inputs
Results
Required Belt Speed (m/min)
10.59 m/min
How to Use This Calculator
- Enter your target throughput in parts per MINUTE (the calculator reports the equivalent parts per hour as an output — if you only know the hourly rate, divide it by 60 before entering it).
- Set product length (mm) and minimum gap between products (mm) for safe handling.
- Enter line efficiency (%) to account for downtime and stoppages.
- Review required belt speed (m/min and mm/sec), product pitch, and index time between parts.
How the result changes with Line Efficiency
| Line Efficiency | Required Belt Speed (m/min) |
|---|---|
| 43% | 20.93 m/min |
| 64% | 14.06 m/min |
| 100% | 9 m/min |
What each input means
- Target Throughput
- Desired number of parts per minute passing a point.
- Product Length
- Length of the product in the direction of belt travel.
- Product Gap
- Minimum gap between consecutive products on the belt.
- Line Efficiency
- Overall equipment effectiveness accounting for stops and jams.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersTarget Throughput = 30, Product Length = 200, Product Gap = 100, Line Efficiency = 85 = 4 input(s) provided
- Calculate Required Belt SpeedRequired Belt Speed10.59 = 10.59
- Calculate Belt SpeedBelt Speed176.5 = 176.5
- Calculate Product PitchProduct Pitch300 = 300
Engine last updated . Checked against 1 independently-derived test — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why does lower line efficiency require a FASTER belt, not a slower one?
Line Efficiency divides into the Required Belt Speed formula, so a lower efficiency (more downtime from stops and jams) means the belt has to move faster during the time it IS running, to still average the target throughput over the full shift. A line running at only 70% efficiency needs a noticeably higher belt speed than one running at 95% to hit the same parts-per-minute target.
What exactly is 'Product Pitch' and why does it matter?
Product Pitch is the total length each item effectively occupies on the belt -- its own Product Length plus the minimum Product Gap to the next item. Required Belt Speed is calculated directly from pitch, so a wider gap (needed for safe handling or downstream sorting) increases the belt speed needed to hit the same throughput.
Does the belt speed I calculate here account for jams and downtime?
Indirectly, through Line Efficiency -- Required Belt Speed is scaled up by dividing by your entered efficiency percentage, which is meant to represent overall equipment effectiveness including stops and jams. It does not model any specific failure mode; it's a single average-efficiency adjustment applied uniformly.
Which Time Between Parts should I size a downstream robot to?
The running figure, not the shift average. The belt is sized to run faster than your target rate so it can make up for downtime, so while it IS moving, parts arrive every Product Pitch divided by belt speed -- 1.7 seconds at the defaults, not 2.0. The shift average is the longer number and it only describes the whole shift including stoppages; a robot cycle timed to it will jam the line.
If I double my target throughput, does the belt speed also double?
Yes, when Product Pitch and Line Efficiency stay the same -- Required Belt Speed is directly proportional to Target Throughput in the formula (speed = throughput x pitch / efficiency), so doubling throughput while holding pitch and efficiency fixed doubles the required belt speed.
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
Robot Cycle Time Calculator
Calculate pick and place cycle time from distances, speeds, and process times. Determine throughput and target feasibility.
Industrial RoboticsAutomation ROI Calculator
Calculate payback period and return on investment from labor savings, throughput gains, and total system cost for automation projects.
ConveyorBelt Conveyor Design Calculator
Belt width, speed, and motor HP from throughput and material.
ConveyorConveyor Belt Tension Calculator
Belt tension from load, friction, and system geometry.
Mechanical EngineeringBelt Drive Design Calculator
Design V-belt or flat belt drives. Calculate belt length, speed ratio, belt speed, and tight/slack side tensions for power transmission.
More in Manufacturing, Industrial & Coatings.