How do you calculate dryer energy cost?

Multiply tonnage by water removed per ton and by energy cost per pound of water to get variable cost, then add the fixed operating cost. For 500 tons, 100 lb/ton, $0.005/lb and $350 fixed, total cost is $352.50.

What is the drying cost per ton?

It is total dryer energy cost divided by tonnage dried. In the example, $352.50 over 500 tons is $0.705 per ton, which is the figure to carry into a quote.

Why separate variable and fixed drying cost?

Variable cost scales with how much water you evaporate, while fixed cost stays put whether you run one ton or a thousand. The example's $2.50 variable plus $350 fixed shows the fixed component dominates at low volume, so spreading it over more tonnage cuts cost per ton sharply.

How can I reduce dryer energy cost?

Lower the incoming moisture through better dewatering, recover waste heat, insulate the drum, and relax residual moisture targets where the spec allows. Each cuts pounds of water removed, the main variable driver.

What does energy cost per pound of water represent?

It is the fuel or electricity cost to evaporate one pound of water, derived from your dryer's specific energy consumption and current fuel price. The example uses $0.005/lb, typical for an efficient gas-fired unit.

Does this include the cost of the product itself?

No. It only covers the energy and fixed cost of drying. Raw material, grinding and bagging costs are tracked separately, so use the per-ton drying figure as one line in a full cost build-up.

Industrial Minerals & Powder Processing calculator

Dryer Energy Cost Calculator

Dryer energy cost captures what it actually costs to drive moisture out of mineral feed in a rotary, fluid-bed or flash dryer, combining the variable energy tied to every pound of water evaporated with the fixed cost of running the dryer. Process and cost engineers in kaolin, sand, gypsum and bentonite plants watch it closely because thermal drying is energy-intensive and fuel price swings hit it hard. Knowing the cost per ton lets you decide whether to dewater mechanically upstream, blend drier feed, or adjust the target residual moisture. This calculator splits the bill into variable and fixed components and reports a clean cost-per-ton figure you can drop straight into a quote or budget.

What this calculator does

Estimate the thermal energy cost to dry industrial minerals from incoming moisture to target moisture using rotary dryers, flash dryers, or fluid bed dryers.
Use it when a plant manager or process engineer needs to budget drying energy cost per ton, compare fuel sources, or justify dryer upgrades based on energy savings.
It multiplies tonnage by water removed per ton and energy cost per pound to get variable drying cost, then adds the fixed operating cost for a period total and a cost per ton.

Formula used

Variable drying cost = production tonnage x water removal per ton x energy cost per lb of water removed
Total dryer energy cost = variable drying cost + fixed dryer operating cost

Inputs explained

Production tonnage to dry:
Water removal per ton of feed:
Energy cost per lb of water removed:
Fixed dryer operating cost per period:

How to use the result

Use it when budgeting drying operations, quoting a moisture-sensitive grade, or evaluating whether mechanical dewatering would beat thermal drying on cost.
It assumes a constant evaporation energy cost per pound; in practice dryer efficiency falls as you chase lower residual moisture, so the marginal cost of the last few points of water can be higher than the average used here.

Current U.S. benchmarks

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 dryer energy cost? Multiply tonnage by water removed per ton and by energy cost per pound of water to get variable cost, then add the fixed operating cost. For 500 tons, 100 lb/ton, $0.005/lb and $350 fixed, total cost is $352.50.
What is the drying cost per ton? It is total dryer energy cost divided by tonnage dried. In the example, $352.50 over 500 tons is $0.705 per ton, which is the figure to carry into a quote.
Why separate variable and fixed drying cost? Variable cost scales with how much water you evaporate, while fixed cost stays put whether you run one ton or a thousand. The example's $2.50 variable plus $350 fixed shows the fixed component dominates at low volume, so spreading it over more tonnage cuts cost per ton sharply.
How can I reduce dryer energy cost? Lower the incoming moisture through better dewatering, recover waste heat, insulate the drum, and relax residual moisture targets where the spec allows. Each cuts pounds of water removed, the main variable driver.
What does energy cost per pound of water represent? It is the fuel or electricity cost to evaporate one pound of water, derived from your dryer's specific energy consumption and current fuel price. The example uses $0.005/lb, typical for an efficient gas-fired unit.

Last reviewed 2026-05-12.