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Estimate daily dry matter intake from body weight and DMI%, convert to as-fed feed weight using moisture, and scale to herd and period tonnage with optional DM feed cost.
Dry cows ~2.0–2.2%; lactating pairs often ~2.5–2.8%; finishing cattle vary with ration energy.
Dry hay ~10–15%; balage/silage much higher — converts DM need to delivered feed weight.
Daily DM ≈ live weight × DMI% of body weight. As-fed weight = DM ÷ dry-matter fraction of the feed.
100 cows at 1,300 lb eating 2.6% BW DM on 12% moisture hay for 30 days.
“Moisture conversion prevents under-ordering hay when comparing lab DM values to delivered bale weights.”
| Field Name | Unit | Description | Typical Range |
|---|---|---|---|
| DMI % BW | % | Expected dry matter intake as a percent of live weight. | 2.0–3.0% for most beef classes |
| Moisture | % | As-fed moisture of the feed being delivered. | 10–15% dry hay; higher for silage |
Follow these standard operating steps to verify numbers and make actionable ranch decisions.
Verify scale weights rather than guessing. Round bale weights, cattle weights, or acreage measurements often differ by 15–25% from visual estimates.
Select the exact cattle category (lactating pairs, dry cows, herd bulls, stockers, or feedlot). The underlying biological engine adjusts DMI, AUE, and thermal thresholds accordingly.
Use the What-If sensitivity sliders to test weather shocks (blizzards, delayed green-up, heatwaves) or market price drops before locking in budgets or feeding plans.
Formulas and constants backed by USDA-ARS, NASEM Nutrient Requirements, and Land-Grant University Extension.
Cattle Ranch Calc adheres strictly to recognized biological standards established by the National Academies of Sciences, Engineering, and Medicine (NASEM) Nutrient Requirements of Beef Cattle (8th Revised Edition), the USDA Agricultural Research Service (ARS), and peer-reviewed extension research from Iowa State University, University of Nebraska–Lincoln, Texas A&M AgriLife, and Kansas State University.
Calculations are provided as predictive management benchmarks. Always corroborate output numbers with certified forage analyses, local scales, livestock nutritionist consults, or your local herd health veterinarian.
Determine how many head of cattle your pasture can sustainably carry for a given grazing period without degrading forage.
Calculate the total tons and number of round or square bales needed to feed your herd through the winter, factoring herd size, weight, daily intake, feeding days, and bale wastage.
Calculate daily and total feed cost per head, blended ration cost per ton, and cost per pound of gain for backgrounding, stocker, or finishing rations.
Calculate cash and all-in cost of gain ($/lb) from feed, yardage, vet, interest, and death-loss reserves — then compare to purchase/sale spread and break-even sale price.