Grain Conversion Calculator

About the Grain Conversion Calculator

Grain is traded in a bewildering array of units around the world. In the United States, the bushel is king—but a bushel of corn (56 lbs) weighs differently than a bushel of wheat (60 lbs) or oats (32 lbs). International markets use metric tons. Elevators may quote in hundredweight (cwt). Truckers need short tons. And every unit conversion depends on which grain you're talking about.

This calculator eliminates confusion by letting you select any grain type and convert seamlessly between bushels, pounds, short tons, metric tons, hundredweight, and kilograms. It also handles volume conversions (bushels to cubic feet and liters) and price conversions ($/bushel to $/ton, $/cwt, etc.).

Whether you're a farmer selling grain, a commodity trader managing international contracts, a feed mill buying ingredients, or a student learning agricultural economics, this calculator provides instant, accurate conversions for all major grain commodities with their standard test weights.

When This Page Helps

Grain unit conversions are error-prone because every grain has a different test weight. A simple multiplication mistake can mean thousands of dollars in a grain contract. This calculator ensures accuracy across all common units and grain types.

How to Use the Inputs

1. Select the grain type from the dropdown (corn, wheat, soybeans, etc.).
2. Enter the quantity you know in any supported unit.
3. All other unit equivalents are calculated automatically.
4. Use the price converter to translate between $/bu, $/ton, $/MT, etc.
5. Check the reference table for standard test weights of all grains.
6. Use presets for common quantities (truckload, railcar, barge).

Example Calculation

Tips & Best Practices

• Always specify the grain type—"1,000 bushels" means different weights for different grains.
• International contracts typically use metric tons; US domestic uses bushels or short tons.
• Rice is often quoted in CWT (hundredweight) rather than bushels in the US.
• A standard railroad hopper car holds about 3,500 bushels (100 metric tons) of corn.
• A Mississippi River barge holds about 52,500 bushels (1,500 metric tons) of corn.
• When moisture is above standard (e.g., >15.5% for corn), actual weight per bushel decreases.

Standard Test Weights by Grain

Each grain commodity has an official standard test weight that defines what a "bushel" weighs. These standards were established by the USDA and are used in all commercial grain trade. Corn: 56 lb/bu, Soybeans: 60 lb/bu, Wheat: 60 lb/bu, Oats: 32 lb/bu, Barley: 48 lb/bu, Grain Sorghum: 56 lb/bu, Rye: 56 lb/bu, Sunflower: 28 lb/bu, Canola: 50 lb/bu, Flaxseed: 56 lb/bu.

Transportation Unit Conversions

Understanding capacity in different transportation modes is essential for logistics planning. A standard semi-trailer holds 900-1,100 bushels depending on commodity density and weight limits. A 65-foot covered hopper rail car holds about 3,500 bushels of corn. A standard Mississippi River barge holds about 52,500 bushels. An ocean-going Panamax vessel holds roughly 2,000,000 bushels. Knowing these conversions helps coordinate harvest logistics and marketing timing.

Moisture Adjustments

Standard test weights assume grain at standard moisture content (corn: 15.5%, soybeans: 13%, wheat: 13.5%). Grain delivered above standard moisture weighs more per bushel (because water is heavy) but is worth less because the buyer must dry it. A rough rule: each 1% moisture above standard reduces the effective test weight by about 1.1 lb/bu for corn. Elevators apply "shrink" factors to account for moisture weight loss and handling losses during drying.

Frequently Asked Questions

• Why do different grains have different bushel weights?

  A bushel is officially a volume measure (1.2445 cubic feet). Since grains have different densities, the same volume weighs different amounts. Standard test weights were established for trade consistency.

• What is a test weight?

  Test weight is the weight of grain that fills a standard Winchester bushel measure (1.2445 ft³). It's measured in lb/bu and indicates grain quality—higher test weight usually means better quality.

• How many bushels in a semi truckload?

  A standard semi trailer holds about 900-1,100 bushels of corn or soybeans, depending on trailer size and weight limits. That's roughly 25-30 short tons.

• What's the difference between short and metric tons?

  A short ton = 2,000 lbs (used in the US). A metric ton (tonne) = 2,204.62 lbs = 1,000 kg (used internationally). A long ton = 2,240 lbs (rarely used for grain).

• How do I convert grain prices between units?

  $4.50/bu corn = $4.50 × (2000/56) = $160.71/short ton = $4.50 × (2204.62/56) = $177.10/metric ton.

• What is CWT?

  CWT stands for hundredweight = 100 pounds. It's commonly used for rice and some specialty crops. 1 short ton = 20 CWT.