Garden Yield Estimate Calculator
Planning what to grow is easier when you know how much to expect from each plant. This calculator multiplies the number of plants by the expected per-plant yield for up to three crops, then sums the total harvest weight. Per-plant yield values in the defaults are consistent with USDA Cooperative Extension vegetable production guides for the continental United States. Actual yields depend on variety, climate, soil quality, and management, so treat results as planning estimates rather than guarantees.
Garden yield formula
Crop yield (lb) = Number of plants x Yield per plant (lb)
Total yield (lb) = Sum of all crop yields
To convert pounds to kilograms, divide by 2.205. Results are gross seasonal yield estimates. Account for losses to pests, disease, and overripe fruit by applying a 10 to 20 percent reduction for realistic planning.
Average seasonal yields for common vegetables
- Tomatoes (indeterminate): 8 to 15 lb per plant per season.
- Zucchini / summer squash: 6 to 10 lb per plant.
- Cucumbers: 5 to 8 lb per plant.
- Bell peppers: 5 to 10 lb per plant.
- Bush beans: 0.5 to 1 lb per plant.
- Lettuce (head): 0.25 to 0.5 lb per head.
Garden yield calculator: frequently asked questions
How do I estimate garden yield?
Multiply the number of plants by the expected yield per plant. For example, 10 tomato plants at 10 lb each yield 100 lb. Yields vary by variety, soil quality, and climate. USDA and extension guides publish average per-plant yields for common vegetables.
What is the average yield per tomato plant?
A well-tended indeterminate tomato plant (such as Celebrity or Early Girl) typically yields 8 to 15 lb of fruit per season. Determinate varieties (Roma) produce 4 to 8 lb. Cherry tomatoes can produce 15 to 20 lb or more. Growing conditions have a large effect.
How much garden space do I need to feed a family of four?
USDA extension guides estimate 200 square feet of garden per person for a significant portion of summer vegetables. For a family of four, 600 to 800 sq ft with succession planting can supply most summer vegetables. The exact area depends on which crops you grow.
Are yield estimates realistic for a home gardener?
Published yields are based on optimal conditions. First-year gardeners should expect 60 to 80 percent of listed yields. Soil quality, watering consistency, pest management, and variety selection all affect actual harvest. Improve yields progressively by adding compost each season.
What are typical per-plant yields for common vegetables?
Tomatoes (indeterminate): 8 to 15 lb. Bell peppers: 5 to 10 lb. Zucchini: 6 to 10 lb. Cucumbers: 5 to 8 lb per plant. Beans (bush): 0.5 to 1 lb per plant. Lettuce: 0.25 to 0.5 lb per head. These are growing-season totals for one plant.
Official sources
- USDA NIFA, home and community gardening: nifa.usda.gov.
- USDA Economic Research Service, vegetable production: ers.usda.gov.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.