How do you calculate conveyor energy cost per ton?

Multiply connected motor load by runtime and the electricity rate to get total cost, then divide by tons processed. Here 55 kW x 8 hr x $0.12 = $52.80 total, divided by 120 tons = $0.44 per ton.

What is the connected motor load on a sort line conveyor?

It is the combined nameplate kW of all the drive motors on the conveyor train. 55 kW in this example covers the belts feeding and discharging the sort line. Use sum of rated motor power unless you have metered data.

Why use cost per ton instead of total energy cost?

Cost per ton normalizes for throughput so you can compare lines and shifts fairly. The $0.44/ton here is comparable across any tonnage, whereas the $52.80 total only describes this specific 8-hour, 120-ton run.

Does this overstate energy if I have VFDs?

Yes. Connected load assumes motors draw nameplate power continuously. VFD-driven or partially loaded belts draw less, so meter a representative run and substitute the average actual kW for a tighter number.

How much energy did the conveyor use?

Energy use is load times runtime: 55 kW x 8 hr = 440 kWh for the period. At $0.12/kWh that is the $52.80 total cost, or $6.60 per hour of running.

How can I lower conveyor cost per ton?

Process more tons during the same runtime (raise belt utilization), add VFDs to cut draw at partial load, or upgrade to high-efficiency motors. Idling a fully energized belt with little material on it is the worst case for cost per ton.

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Sort Line Conveyor Energy Cost Calculator

Sort line conveyor energy cost converts the connected motor load on a MRF conveyor train into a dollars-per-ton figure, so operations and finance can see what moving material actually costs. Plant engineers and continuous-improvement teams use it to benchmark lines, justify VFD or high-efficiency motor upgrades, and allocate energy into the cost of processed tons. It matters because conveyors run nearly continuously and a 55 kW train at $0.12/kWh quietly accumulates real money every shift. Expressing it per ton makes energy comparable across lines and against commodity margins.

What this calculator does

Estimate the electricity cost of running a sort line conveyor or full conveyor train and convert it to cost per ton processed.
Use it when scoping a VFD retrofit, comparing belt speeds, or pricing energy into a per-ton processing cost for a contract bid.
It computes total conveyor energy cost from motor load, runtime and electricity rate, then divides by tons processed to give cost per ton.

Formula used

Total conveyor energy cost = connected motor load x belt runtime x blended electricity rate
Conveyor energy cost per ton = total conveyor energy cost / tons processed during runtime

Inputs explained

Conveyor train connected motor load:
Belt runtime per period:
Blended electricity rate:
Tons processed during runtime:

How to use the result

Use it when benchmarking line energy, evaluating a motor or VFD upgrade, or building a per-ton cost model.
It uses connected (nameplate) load, not metered draw, so it overstates cost for lightly loaded or VFD-modulated belts; meter a sample run to calibrate.

Current U.S. benchmarks

As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate conveyor energy cost per ton? Multiply connected motor load by runtime and the electricity rate to get total cost, then divide by tons processed. Here 55 kW x 8 hr x $0.12 = $52.80 total, divided by 120 tons = $0.44 per ton.
What is the connected motor load on a sort line conveyor? It is the combined nameplate kW of all the drive motors on the conveyor train. 55 kW in this example covers the belts feeding and discharging the sort line. Use sum of rated motor power unless you have metered data.
Why use cost per ton instead of total energy cost? Cost per ton normalizes for throughput so you can compare lines and shifts fairly. The $0.44/ton here is comparable across any tonnage, whereas the $52.80 total only describes this specific 8-hour, 120-ton run.
Does this overstate energy if I have VFDs? Yes. Connected load assumes motors draw nameplate power continuously. VFD-driven or partially loaded belts draw less, so meter a representative run and substitute the average actual kW for a tighter number.
How much energy did the conveyor use? Energy use is load times runtime: 55 kW x 8 hr = 440 kWh for the period. At $0.12/kWh that is the $52.80 total cost, or $6.60 per hour of running.

Last reviewed 2026-05-12.