Harvest Yield Calculator
Estimate total expected harvest in pounds or kilograms based on plant count, per-plant yield, and a realistic 70% success rate for planning preservation and food supply.
Calculate harvest yield
Enter the number of plants and the expected average yield from each plant. The calculator estimates both best-case and realistic totals.
30.00 lb
Based on 12 plants with an average yield of 2.5 lb each.
How to use this calculator
Enter how many plants you have in the ground and a realistic average yield per plant for that crop. The calculator multiplies to show a best-case total plus a realistic 70% estimate that accounts for pests, weather, and misses. Size your preservation plan to the realistic number, not the best-case.
Tips for success
- Use realistic averages: Actual yield can vary with weather, pests, soil, and care. Start with extension-service numbers and derate 20–30% for first-year gardens.
- Track variety differences: Different varieties of the same crop may yield very differently. Record per-plant output each season to calibrate future estimates.
- Plan for the realistic number: Size your canning, freezing, or dehydrating capacity to 60–80% of the best-case estimate, not the peak figure.
- Succession plant: Stagger plantings every 2–3 weeks to avoid a single oversized flush that overwhelms your preservation capacity.
- Records compound: Yield tracking becomes more accurate over multiple seasons. Two to three years of records smooth out year-to-year swings from weather and pests.
FAQ
How much food can I actually expect from my garden?
Typical per-plant harvest (in a good year): tomatoes 10 to 20 lb, peppers 2 to 4 lb, zucchini 8 to 12 lb, bush beans 0.5 to 1 lb of dry beans or 2 to 4 lb of fresh pods, cucumbers 8 to 12 lb, winter squash 10 to 20 lb. Multiply by your plant count and a realistic success rate (70 to 85 percent of plants produce). A family-scale bed of 20 plants usually yields 100 to 250 lb of fresh produce.
What's a realistic per-plant yield?
Use university extension or seed catalog averages as your starting point, then derate by 20 to 30 percent for first-year gardens, poor soil, or marginal climates. Best-case yields on seed packets assume professional-level watering, fertilization, and pest control, new gardeners typically hit 50 to 70 percent of those numbers. After a few seasons in the same soil with good practices, 85 to 100 percent is achievable.
Why does my actual yield vary so much from year to year?
Weather is the biggest variable. A cold spring, a late frost, an August heat wave, or an unusually wet stretch can each cut yields by 30 to 50 percent. Pest and disease pressure (squash vine borer, tomato hornworm, powdery mildew, blight) can wipe out individual crops entirely. Track what happened each season so future estimates get more accurate. Two to three years of records usually smooth out the year-to-year swings.
How should I plan preservation around my expected yield?
Size your preservation setup for 60 to 80 percent of the calculator's estimate, not the full number. Eat fresh first (best flavor and nutrition), preserve the surplus. For 100 lb of tomatoes, figure on about 20 quarts of sauce or 40 pints of salsa. For 10 lb of green beans, about 8 pint jars canned or 3 gallons frozen. Start small on preservation method variety, one canner or one dehydrator load at a time.
When should I grow more plants versus switching varieties?
If your yield per plant is already 70 to 85 percent of the realistic estimate, scaling plant count gives you proportional returns. If yield per plant is below 50 percent, fix the variety, soil, or care before adding plants, more plants with the same problem just grow more bad outcomes. Diversifying varieties also hedges against disease: two tomato varieties in one bed mean one bout of blight doesn't wipe the whole harvest.