Vegetable Yield Calculator — Garden Harvest Estimate
Enter your plot size, plant spacing, typical yield per plant, and number of growing seasons — and get an estimate of total annual vegetable harvest plus a chart showing how yield changes with spacing.
Area unit
inches
lbs
Total harvest weight per year across all seasons (lbs)
- 1
Spacing in feet
18 ÷ 12 = 1.5 - 2
Plants in plot
⌊40 ÷ 2.25⌋ = 17Floor division: plants fit in a square grid. - 3
Yield per season
17 × 2 = 34 - 4
Annual yield
34 × 1 = 34
How does this calculator work?
Plants fit in your plot = ⌊area ÷ spacing²⌋ (square spacing). Total yield = plants × yield-per-plant × seasons-per-year. Results are order-of-magnitude estimates — actual harvest depends heavily on soil, water, pests, variety, and weather.
Formula
How this is calculated
The calculator divides your plot area by the square of the plant spacing (centre-to-centre) to estimate how many plants fit in a grid pattern — the standard square-foot gardening layout. Tighter spacing means more plants but smaller individuals and less yield per plant; wider spacing means fewer, larger, and often more productive plants.
Yield per plant is a highly variable figure that depends on variety, soil fertility, watering, pest pressure, and local climate. The defaults and hints use representative mid-season values for common crops; always check the variety notes on your seed packet or nursery label and treat the result as an order-of-magnitude estimate rather than a precision guarantee.
The yield-vs-spacing chart shows how your annual harvest changes across a range of spacings for the same yield-per-plant value, helping you decide where the trade-off between plant count and individual size sits for your target crop.
Frequently asked questions
It is a rough guide only. Actual yield varies by 50% or more depending on soil quality, watering regime, pest and disease pressure, weather, and variety. Use it to compare spacing options and set expectations, not to plan a catering contract.
Square (equal) spacing maximises plant density for a given area and is the basis this calculator uses. Traditional row spacing is wider between rows than within rows — to use that, multiply row spacing by within-row spacing (both in feet) instead of squaring a single value.
Divide the pound figure by 2.205 to get kilograms. One pound equals about 0.454 kg.
Also known as
TG we-Calculate Editorial Team. (2026). Vegetable Yield Calculator — Garden Harvest Estimate [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/vegetable-yield-calculator
TG we-Calculate Editorial Team. "Vegetable Yield Calculator — Garden Harvest Estimate." TG we-Calculate. 2026. https://we-calculate.com/calculator/vegetable-yield-calculator.
TG we-Calculate Editorial Team, "Vegetable Yield Calculator — Garden Harvest Estimate," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/vegetable-yield-calculator
@misc{wecalculate_vegetable_yield_calculator, title = {Vegetable Yield Calculator — Garden Harvest Estimate}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/vegetable-yield-calculator}}, year = {2026}, note = {TG we-Calculate} }
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