How do you calculate dry tonnage from wet tonnage?

Multiply wet tonnage by one minus the moisture fraction. With 200 wet tons at 5% moisture: 200 x (1 - 0.05) = 190 dry tons, meaning 10 tons of water.

Why pay for material on a dry basis?

Moisture is water you do not want; paying the mineral price for it inflates cost and distorts yield. Dry-basis accounting ensures you pay only for the saleable solid, here 190 of the 200 received tons.

How much does moisture testing cost per ton?

It varies, but combining a per-ton handling charge with fixed lab cost gives the full picture. At 0.50 per ton plus 75 fixed on 200 tons, the moisture adjustment cost is 200 x 0.50 + 75 = 175 dollars.

What is the difference between wet and dry basis moisture?

Wet basis expresses water as a fraction of total wet weight; dry basis expresses it relative to dry solids. This calculator uses wet basis, so confirm your lab reports the same convention before entering the percent.

How much water am I handling at 5% moisture?

On 200 wet tons, 5% moisture is 10 tons of water you convey, dry off and pay to handle. That water also affects flowability, caking and dust-collection load downstream.

Does moisture affect more than just weight?

Yes. Beyond inflating paid tonnage, moisture changes flowability, promotes caking and bridging in silos, and shifts dust and screening behavior, so the percent matters operationally as well as commercially.

Industrial Minerals & Powder Processing calculator

Moisture Content Adjustment Calculator

Moisture Content Adjustment converts as-received wet tonnage into the dry tonnage you actually bought or shipped, and totals the cost of testing and handling that moisture. Purchasing, QC and shipping teams at mineral, clay and aggregate operations use it because bulk minerals are priced and spec'd on a dry basis, so paying for water inflates cost and skews yield. It also flags how much water you are conveying, drying and paying to handle. Getting the dry-basis number right protects margins on every inbound rail car and outbound shipment.

What this calculator does

Calculate the dry tonnage of mineral product from wet weight using incoming moisture percentage, so you can report production on a consistent dry basis for inventory, sales, and quality records.
Use it when a quality manager, production supervisor, or logistics coordinator needs to convert as-received wet tons to dry tons for invoicing, inventory, shipping weight, or specification compliance.
It computes dry tonnage from wet tonnage and moisture percent, the water removed, and the total moisture testing and lab cost.

Formula used

Dry tonnage = wet tonnage x (1 - moisture content / 100)
Moisture adjustment cost = wet tonnage x moisture testing cost + fixed lab cost

Inputs explained

Wet tonnage (as-received):
Moisture content:
Moisture testing and handling cost:
Fixed lab or QC cost per period:

How to use the result

Use it on inbound receipts and outbound shipments where material is priced on a dry basis and moisture must be backed out.
It assumes the reported moisture percent is accurate and representative; a non-representative sample or surface vs total moisture confusion will throw off the dry tonnage.

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 dry tonnage from wet tonnage? Multiply wet tonnage by one minus the moisture fraction. With 200 wet tons at 5% moisture: 200 x (1 - 0.05) = 190 dry tons, meaning 10 tons of water.
Why pay for material on a dry basis? Moisture is water you do not want; paying the mineral price for it inflates cost and distorts yield. Dry-basis accounting ensures you pay only for the saleable solid, here 190 of the 200 received tons.
How much does moisture testing cost per ton? It varies, but combining a per-ton handling charge with fixed lab cost gives the full picture. At 0.50 per ton plus 75 fixed on 200 tons, the moisture adjustment cost is 200 x 0.50 + 75 = 175 dollars.
What is the difference between wet and dry basis moisture? Wet basis expresses water as a fraction of total wet weight; dry basis expresses it relative to dry solids. This calculator uses wet basis, so confirm your lab reports the same convention before entering the percent.
How much water am I handling at 5% moisture? On 200 wet tons, 5% moisture is 10 tons of water you convey, dry off and pay to handle. That water also affects flowability, caking and dust-collection load downstream.

Last reviewed 2026-05-12.