The Seed Spacing to Yield Converter calculates how many plants fit in a garden bed based on recommended spacing and projects total expected harvest pounds. Spacing requirements are crop-specific: tomatoes 24–36 inches (single plants per square foot effectively), lettuce 6–12 inches (4–25 per sqft depending on cultivar), carrots 2–4 inches (16–100 per sqft), bush beans 4–6 inches, broccoli 18–24 inches. Calculator formula: Plants Fit = Bed Sqft ÷ (Spacing inches × Spacing inches / 144); Total Yield = Plants × Per-Plant Yield.
Typical per-plant yield figures (full season, healthy conditions): indeterminate tomato 8–12 lb, determinate tomato 4–8 lb, lettuce head 0.5–1 lb, cucumber 5–10 lb, bush bean 0.5–1 lb, pole bean 1–2 lb, broccoli 0.5–1.5 lb main head plus side shoots, zucchini/summer squash 10–20 lb (notoriously prolific), bell pepper 5–10 lb. Yield depends on variety, soil quality, water/fertilizer management, pest pressure, season length, and gardener skill. New gardeners typically achieve 50–70% of these benchmarks; experienced gardeners with optimized systems often exceed them.
Bed sizing context: standard raised bed 4×8 feet = 32 sqft. Square foot gardening method packs 1, 4, 9, or 16 plants per square foot depending on plant size — a 4×4 bed grows 1 tomato + 16 carrots + 4 lettuces per square foot in different squares = substantial output. Intensive spacing (closer than recommended) increases yield per sqft but reduces per-plant yield and increases disease risk; wide spacing is opposite. Most home gardeners find recommended spacing optimal balance.
Who needs this: backyard gardeners planning bed layout, allotment renters maximizing limited space, urban gardeners with containers, school garden coordinators, food forest designers, market gardeners scaling production. The calculation reveals surprising abundance — even a small 4×4 bed can produce $200–500 worth of vegetables annually at retail prices. The 'pay yourself for gardening' framing motivates new gardeners — at $5/hour effective labor cost (typical), gardens yielding $300 of produce return $300 worth of $5/hour 'wages' for the season's work.
PrimeCalcPro provides professional-grade tools trusted by businesses and academics.