Estimate your hay field’s annual production in tons per acre and total bales by entering hay type, stand condition, planned cuttings, and fertilization level. Get bale counts, sale value, and livestock feed coverage for your operation.
Not all hay cuts are equal — the first cutting of the season is nearly always the heaviest in tonnage, but later cuttings are often higher in crude protein and digestibility because the plants are younger and leafier at harvest. Alfalfa under good irrigation can produce 1.5–2.5 tons of dry matter per cutting in the West, while dryland alfalfa in the northern humid regions typically averages 0.8–1.5 tons per cutting. Cool-season grasses like orchardgrass and timothy tend to yield 0.7–1.2 tons per cutting with proper management. The first cut, coming off fall-accumulated growth, is often the largest single cut of the year. Third and fourth cuts are lighter but command premium prices for horse hay due to their soft texture and high leaf content.
A new alfalfa or grass stand in its first full growing season will typically yield only 50–70% of what an established stand produces. Roots are still developing, and the plant canopy is not yet dense enough to capture maximum sunlight. An established stand in good condition — thick, uniform coverage with fewer weeds and no winterkill gaps — represents peak productivity, usually achieved in years two through five. As stands age past five to seven years, thinning begins: perennial grass species may crowd out clover, weed pressure increases, and yield per acre drops 20–35% compared to peak. Alfalfa stands in particular decline faster in poorly drained soils and in regions with frequent freeze-thaw cycles. Interseeding or complete renovation is usually the more cost-effective option once the stand falls below 3–4 plants per square foot.
Nitrogen is the single biggest yield driver for grass hay. Orchardgrass, timothy, bermudagrass, and fescue respond dramatically to nitrogen — fields with no nitrogen applied may yield only 60–70% as much as the same field receiving moderate rates (60–80 lbs N/acre/year). High nitrogen programs (100–150 lbs N/acre split across the season) can push grass hay yields 20–30% above the moderate baseline, though diminishing returns set in above roughly 120 lbs N/acre. Alfalfa fixes its own nitrogen through root-nodule bacteria and does not benefit from nitrogen fertilization the way grasses do; phosphorus, potassium, and sulfur are the key nutrients for maintaining alfalfa yield and stand persistence. A soil test every two to three years is the most reliable guide to fertilizer rates.
Earlier cutting generally produces higher protein, higher digestibility hay — but at the cost of tonnage. Alfalfa cut at late bud stage (10% bloom) yields less per cutting than alfalfa cut at full bloom, but the ADF and NDF values are lower (more digestible), and RFV (relative feed value) is higher, commanding higher prices in dairy and performance horse markets. For beef cattle maintenance hay, waiting until 50% bloom maximizes tonnage and is acceptable nutritionally. Grass hay cut at the boot to early-head stage yields the best balance of tonnage and quality. Once grass has gone to seed head, stem fraction increases, protein drops, and even high-quality livestock struggle to eat it efficiently. Plan your cutting intervals — typically 28–35 days between cuts for alfalfa in summer — rather than waiting for visual cues alone.
This calculator estimates dry matter yield, which is the agronomic standard. Actual bale weights at the time of baling depend heavily on moisture content. Safe baling moisture is 15–20% for small square bales and 18–25% for large round bales with net wrap. Hay baled at 20% moisture weighs roughly 25% more than its dry matter equivalent — a bale that is 50 lbs dry matter weighs about 62 lbs at 20% moisture. Storing hay above 20% moisture risks significant heating, mold, and dry matter loss; severely wet bales can ignite from spontaneous combustion. Large round bales baled slightly wetter can be preserved with propionic acid or wrapped for baleage (fermented hay). When selling or purchasing hay, always clarify whether the quoted tonnage is dry matter or as-fed weight and what moisture testing was done.
Hay prices are highest in late winter and early spring when supplies tighten and buyers who did not put up enough forage compete for what is left. Selling immediately after baling — usually June through August — means accepting lower prices but eliminates storage loss (typically 5–15% dry matter loss per year for outside-stored round bales, and 2–5% for inside-stored bales). If you have barn storage, holding grass hay from June to February can net $30–$60 more per ton. Alfalfa with high relative feed value commands an even larger seasonal premium. Grass hay in the $150–$200/ton range at summer sales may bring $190–$250/ton by March. The break-even on storage depends on your per-bale storage cost, the storage dry matter loss rate, and how accurately you can predict winter demand in your area.
What counts as a good yield varies significantly by hay type and region. For alfalfa under irrigation in the West, 6–10 tons per acre per season is achievable and excellent. Dryland alfalfa in the Midwest at 3–5 tons per acre total is considered a good year. Cool-season grass hay like orchardgrass or timothy in the northern humid region averages 2–4 tons per acre total across two to three cuttings; anything above 3.5 tons is strong performance for that system. Bermudagrass in the Southeast can reach 4–7 tons per acre with aggressive nitrogen programs and four to six cuttings per year. If your actual yields are consistently 30% or more below these benchmarks for your region and hay type, soil fertility, stand condition, or cutting management is the most likely culprit — worth a soil test before investing in inputs.
A standard small square bale weighs 40–60 pounds, with 50 pounds being the common benchmark. At 50 pounds per bale, one ton (2,000 lbs) equals 40 small square bales. However, actual bale weights vary with moisture at baling, baler settings, and hay density — a baler set tight and baling slightly wet alfalfa can produce 65-pound bales, while loose dry grass hay might come out at 38 pounds. If you are buying by the bale, always ask the bale weight before calculating your per-ton cost. A 50-pound bale at $10 each works out to $400/ton — compare that to the going rate per ton in your area before agreeing to a price-per-bale deal. Weigh several bales to get a reliable average rather than assuming a nominal weight.
A mature beef cow consuming hay for a typical 150–180-day winter feeding period needs roughly 2,250–2,700 pounds of hay (at 15 lbs/day for a 1,200-pound cow, though many use 30 lbs/day as a more generous estimate accounting for waste and cold-weather demand increases). At 2 tons per acre total annual production, a field would support one cow’s winter hay needs per acre. At higher yields — say 4 tons per acre — the same acre could theoretically support two cows through winter. These numbers assume all produced hay goes to that herd with no sales, no storage loss, and no other feed. Most operations supplement hay with corn stalks, cover crop grazing, or purchased feed, so the “acres per cow” figure is a planning estimate, not a hard ceiling.
Yes — significantly. Research from multiple land-grant universities consistently shows that first-year alfalfa stands yield 40–60% of a mature stand’s production, partly because the crowns and root system are still developing and partly because new seedings typically take longer to close the canopy and suppress weeds. The more striking effect is at the other end: alfalfa stands with thin populations (fewer than 2–3 plants per square foot for alfalfa) can yield 35–50% less than a good stand, even if the individual surviving plants look healthy. For grass hay, thin stands let weeds fill in and reduce forage quality as much as quantity. Scouting your stand density each spring — walking diagonal transects and counting stems per square foot — takes 20 minutes and tells you whether renovation or continued management is the right economic call.