Agricultural Commodities & Seeds · Specify / Buy
Moisture basis and shrinkage weight calculator
Weight moves with moisture, and two offers quoted at two moisture levels are not the same tonnage. This tool does one thing: dry-matter mass balance on the figures you enter from your own measurement. It holds no commodity database, no default moisture and no assumed grade. It calculates; it does not weigh your cargo, decide your contract basis, or settle anything.
Choose the calculation
Every value you enter must come from your own measurement or from the certificate for the exact lot. Nothing is preloaded, because a commodity name does not carry a fixed moisture.
Restate a weight at another moisture
Dry matter is conserved: the weight changes only because the water content changes.
What this arithmetic is and is not
- • It is a dry-matter mass balance on the numbers you supplied. Only water is treated as removable; dust, fines and screenings are not modelled.
- • It does not know how your moisture was measured, and meter readings and reference oven results disagree on the same lot.
- • A calculated weight is arithmetic on the numbers you entered. It is not a settlement weight, not an invoice weight and not a survey result. Only the sampling, analysis and weighing method named in your contract can settle a shipment.
- • It publishes no moisture limit, no grade and no discount scale. Those belong to the grading standard and to your contract.
Fix every quality figure, tolerance, test method, inspection point and weight basis in the written contract before shipment, and settle only against the independent analysis and weighing method the contract names.
A calculated tonnage is arithmetic, not a weighing. Agree the sampling, moisture method, weighing point and tolerance in the contract, and settle only against them.
Use this when
- You need the weight of a lot restated at a different moisture level.
- You need the shrink from drying a lot from its measured moisture to a target moisture.
- You are comparing two offers quoted at different moisture levels and want them on one basis.
- You are checking whether an arrival weight difference is consistent with the moisture difference alone.
- You need the dry-matter tonnage behind a quoted as-is tonnage for a costing.
How this works
- 1. Choose the calculation: basis conversion, drying shrink, or an as-is comparison of two offers.
- 2. Enter the weight and the measured moisture from your own analysis. Nothing is preloaded, because a commodity name does not have a fixed moisture.
- 3. Enter the target moisture your contract or process names.
- 4. Read the result with the dry-matter equation shown, so the arithmetic can be checked line by line.
- 5. Treat the output as arithmetic only, and settle against the sampling, analysis and weighing method your contract names.
What this page does not determine
- It does not measure moisture. Meter readings, oven results and contract methods disagree, and only the method named in your contract counts.
- It does not model drying. Handling loss, dust, screenings, fines, respiration and shrink beyond water removal are not included in a dry-matter balance.
- A calculated weight is arithmetic on the numbers you entered. It is not a settlement weight, not an invoice weight and not a survey result. Only the sampling, analysis and weighing method named in your contract can settle a shipment.
- It publishes no grade limits, no maximum moisture, no defect tolerance and no test-weight figure as an Allzone number. Every figure comes from the official grading standard, the destination requirement or the contract you negotiate.
- It makes no food-safety, mycotoxin, residue, microbiological, phytosanitary or import-eligibility conclusion, and it does not confirm that a lot may legally enter any market.
- It makes no price, premium, discount or market statement. Commercial terms are negotiated, not derived from a page.
- Fix every quality figure, tolerance, test method, inspection point and weight basis in the written contract before shipment, and settle only against the independent analysis and weighing method the contract names.
Relevant Allzone commodities to investigate
These are catalogue identities relevant to the decisions on this page. A listing here is not an offer of a specific grade, quality, origin or crop year, and it is not a suitability, documentary or compliance claim.
- WheatCereal identity where protein, test weight, falling number and moisture are separate contract terms.
- BarleyCereal identity where end use (feed or malting) changes which figures matter.
- OatsCereal identity where hull content, test weight and moisture are specified terms.
- Corn (Maize)Cereal identity with broken-kernel, foreign-material and moisture terms quoted separately.
- SoybeansOilseed identity where moisture, foreign material and damage are separate terms.
- Canola SeedOilseed identity where oil content and moisture are quoted on a declared basis.
- FlaxseedOilseed identity where moisture and admixture dominate the acceptance discussion.
- Mustard SeedOilseed identity traded by type and purity, with moisture stated separately.
- LentilsPulse identity traded on size, colour, splits, foreign material and moisture. Every one of those is a contract figure, not a product property.
- Dry PeasPulse identity where splits, bleaching and moisture dominate the acceptance discussion.
- Sunflower SeedsEdible seed identity specified on calibre, kernel content and moisture.
- Sesame SeedEdible seed identity where purity, oil content, colour and free fatty acid are separate terms.
Where this comes from, and what it cannot tell you
Dry-matter mass balance
Supports: Dry matter is conserved when only water is removed, so weight at one moisture converts exactly to weight at another moisture through the dry-matter fraction.
Limitation: Exact only for the inputs supplied, and only where water is the sole quantity removed. Real drying also removes fines and dust.
General · Mathematical identity
Moisture measurement method variability
Supports: Meter and reference oven methods produce different moisture values for the same lot, which is why contracts name a method.
Limitation: This tool cannot know which method produced your input value, and it does not reconcile methods.
General · Method standards are revised by their issuing bodies.
Where to go next
- Commodity quality specification and acceptanceFix the moisture basis, the test method and the acceptance point in the contract before the arithmetic matters.
- Bulk flow and caking troubleshootingBridging, caking and flow failure in a dry bulk material is diagnosed by the Feed flow owner, not here.
- Feed ingredient specification and documentationFeed-channel specification, nutrient declarations and feed documentation are owned by Feed Ingredients.