Crop Yield Calculator
Estimate the total tons of harvested crop per acre by entering your plant population, harvest success rate, and average plant weight. Ideal for pre-harvest planning and comparing yield scenarios across different growing conditions.
About this calculator
Crop yield per acre depends on three key factors: how many plants survive in the field, what fraction are successfully harvested, and how much each plant produces. The formula used here is: Yield (tons/acre) = (plantPopulation × (harvestRate / 100) × avgWeight) / 2000. The division by 100 converts the harvest rate from a percentage to a decimal proportion, so a 90% rate becomes 0.90. Multiplying plant population by that proportion gives the number of successfully harvested plants. Each harvested plant contributes its average weight in pounds, and dividing by 2,000 converts the total pounds into short tons. This model is especially useful for row crops like corn, soybeans, and sunflowers where plant population and harvest efficiency are well-documented inputs from agronomic records or field scouting.
How to use
Suppose you plant 32,000 corn plants per acre, achieve an 85% harvest success rate, and each plant yields 0.75 lbs of grain. Step 1 — Apply the formula: Yield = (32,000 × (85 / 100) × 0.75) / 2,000. Step 2 — Solve inside the parentheses: 85 / 100 = 0.85, then 32,000 × 0.85 = 27,200 harvested plants. Step 3 — Multiply by weight: 27,200 × 0.75 = 20,400 lbs. Step 4 — Convert to tons: 20,400 / 2,000 = 10.2 tons per acre. Enter your own values to instantly see how changes in planting density or harvest rate affect your total yield.
Frequently asked questions
What is a good crop yield per acre for corn or soybeans?
Average U.S. corn yields run roughly 175–180 bushels per acre (about 4.9–5.0 tons), while soybeans average around 50 bushels per acre (roughly 1.5 tons). These benchmarks vary significantly by region, soil quality, irrigation availability, and hybrid selection. Using this calculator lets you compare your expected yield against those averages before harvest to identify any gaps worth addressing.
How does harvest success rate affect total crop yield?
The harvest success rate directly scales your effective plant population. A drop from 95% to 80% on a 30,000-plant stand reduces harvestable plants by 4,500 per acre — a substantial loss. Factors like pest pressure, disease, lodging, and equipment settings all influence this rate. Monitoring field conditions and adjusting combine settings can meaningfully lift your harvest rate and overall tonnage.
Why is crop yield measured in tons per acre instead of bushels?
This calculator outputs short tons, which is a universal weight unit useful across crop types including fresh-market vegetables, silage, and specialty crops that are not traded in bushels. Grain crops like corn and wheat are commonly sold by the bushel, but agronomists often work in pounds or tons when comparing diverse operations. You can convert tons back to bushels by dividing by the standard test weight for your crop (e.g., 0.025 tons per bushel for corn at 56 lbs/bu).