jardineria

Vegetable Garden Yield Calculator — Expected Harvest by Crop

Calculate how many kilograms your vegetable garden will produce. Enter crop type and area in m² to get your expected harvest — with a reference table of kg/m² for 15+ crops.

Data verified · June 2026
Edited by Martín Rodríguez
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The Vegetable Garden Yield Calculator estimates how many kilograms of produce a home garden plot will realistically deliver in a single growing season. It uses per-crop yield benchmarks (kg/m²) from USDA extension data, multiplied by your planted area. Whether you're planning a raised bed, a backyard vegetable patch, or a community garden plot, knowing expected yield helps you plan canning, size cold storage, and avoid overplanting.

The core formula is: Expected Yield (kg) = Yield Rate (kg/m²) × Planted Area (m²), where the yield rate varies by crop. Controlled environments (greenhouses, grow lights) can raise rates 30–60%; shaded or compacted-soil beds may reduce them 20–40%.

When to use this calculator

Calculating how many pounds of tomatoes a 4×8 ft raised bed (≈3 m²) will produce to decide how many jars of sauce to prepare for canning season.
Planning a community garden plot: determining if 20 m² of mixed vegetables can supply a family of four with enough produce for 6 months.
Estimating squash overproduction risk — at 4.5 kg/m², even a 3 m² plot yields ~13.5 kg, helping gardeners plant only 1–2 m².
Sizing a root cellar before harvest: a 15 m² potato bed at 3.5 kg/m² means storing ~52 kg of potatoes.
Comparing growing methods — whether switching from in-ground beds to raised beds (which can boost yield by 20–30%) justifies the setup cost.
Budgeting seed and fertilizer purchases proportionally to planned harvest volume for market gardeners selling at farmers' markets.

Vegetable Yield Rates by Crop (Home Garden Benchmarks)

Crop	Yield Range (kg/m²)	Avg Used (kg/m²)	Season	Key Notes
Tomato (indeterminate)	2.5 – 4.0	3.0	Summer	Stakes/cages required
Tomato (bush/determinate)	1.5 – 2.5	2.0	Summer	Shorter harvest window
Squash / Zucchini	3.5 – 5.5	4.5	Summer	1–2 plants/m² max
Bell Pepper	1.2 – 2.0	1.5	Summer	Open beds
Cucumber	2.0 – 3.5	2.8	Summer	Trellised plants yield more
Green Beans (bush)	0.8 – 1.5	1.2	Summer	Succession sowing recommended
Lettuce (loose-leaf)	1.5 – 2.5	2.0	Spring/Fall	Multiple cuts possible
Spinach	1.0 – 1.8	1.4	Spring/Fall	Bolts in heat
Kale	1.5 – 2.2	1.8	Spring/Fall	Cut-and-come-again
Carrot	2.0 – 3.0	2.5	Spring/Fall	Needs deep loose soil
Potato	2.5 – 4.5	3.5	Summer	Needs hilling
Garlic	0.8 – 1.2	1.0	Fall/Summer	—
Onion	1.5 – 2.5	2.0	Spring/Summer	Sets vs. seed affects yield
Strawberry	0.5 – 1.0	0.75	Spring/Summer	Peak yield in year 2–3
Pumpkin	4.0 – 8.0	6.0	Summer	Needs 3–5 m²/plant

Fuente: USDA National Agricultural Statistics Service, UC Davis Vegetable Research and Information Center, Penn State Extension — Home Vegetable Gardening. Rates reflect average home-garden productivity under full sun (≥6 h/day), standard fertilization and adequate watering. Raised beds yield ~20–30% more than in-ground plots; shaded/compacted beds may yield 20–40% less.

How it works

How Vegetable Garden Yield Is Calculated

The formula is straightforward:

Expected Yield (kg) = Yield Rate (kg/m²) × Planted Area (m²)

Tomatoes (10 m²):  3.0 kg/m² × 10 = 30 kg/season
Carrots  (6 m²):   2.5 kg/m² ×  6 = 15 kg/season
Potatoes (20 m²):  3.5 kg/m² × 20 = 70 kg/season

Yield rates represent average home-garden productivity under adequate watering, standard fertilization (balanced N-P-K), and full sun (≥6 h/day). Raised beds yield 20–30% more than in-ground plots due to better drainage and soil quality.

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Reference Table — Vegetable Yield Rates by Crop

Benchmarks from USDA extension data, UC Davis, and Penn State Extension:

Crop	Yield Rate (kg/m²)	Season	Notes
Tomato (indeterminate)	2.5 – 4.0	Summer	Stakes/cages required; avg 3.0
Tomato (bush/determinate)	1.5 – 2.5	Summer	Shorter harvest window
Squash / Zucchini	3.5 – 5.5	Summer	avg 4.5; only 1–2 plants/m²
Bell Pepper	1.2 – 2.0	Summer	Avg ~1.5 kg/m² open beds
Cucumber	2.0 – 3.5	Summer	Trellised plants yield more
Green Beans (bush)	0.8 – 1.5	Summer	~1.2 avg; succession sow
Lettuce (loose-leaf)	1.5 – 2.5	Spring/Fall	Multiple cuts; avg 2.0
Spinach	1.0 – 1.8	Spring/Fall	Bolts in heat
Kale	1.5 – 2.2	Spring/Fall	Cut-and-come-again
Carrot	2.0 – 3.0	Spring/Fall	avg 2.5; needs deep loose soil
Potato	2.5 – 4.5	Summer	avg 3.5; needs hilling
Garlic	0.8 – 1.2	Fall/Summer	~1.0 avg
Onion	1.5 – 2.5	Spring/Summer	Sets vs. seed affects yield
Strawberry	0.5 – 1.0	Spring/Summer	Peaks in year 2–3
Pumpkin	4.0 – 8.0	Summer	Sprawling; needs 3–5 m²/plant

> 1 kg ≈ 2.205 lbs. To convert yields to pounds, multiply the kg result by 2.205.
> 1 m² = 10.764 sq ft. A standard 4×8 ft raised bed ≈ 2.97 m².

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Typical Scenarios

Scenario 1 — Backyard Salad Garden (8 m²)

Lettuce 3 m²: 2.0 × 3 = 6 kg

Spinach 2 m²: 1.4 × 2 = 2.8 kg

Kale 3 m²: 1.8 × 3 = 5.4 kg

Total: ~14.2 kg of salad greens from two mini-seasons.

Scenario 2 — Tomato & Pepper Raised Bed (6 m²)

Tomatoes 2.2 m²: 3.0 × 2.2 = 6.6 kg

Peppers 1.5 m²: 1.5 × 1.5 = 2.25 kg

Cucumbers 2.0 m²: 2.8 × 2.0 = 5.6 kg

Total: ~14.5 kg — about 50 servings of fresh produce.

Scenario 3 — Potato Storage Bed (20 m²)

3.5 kg/m² × 20 m² = 70 kg of potatoes

At 150 g per medium potato: ~466 potatoes, or 1.3 kg/person/week for a family of 4 over 13 weeks.

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Common Mistakes

1. Using commercial farm yields. USDA commercial tomato fields yield 8–10 kg/m²; home gardens average 2.5–4.0 kg/m². Applying farm rates will grossly overestimate your harvest.
2. Ignoring spacing requirements. Zucchini needs 0.5–1 m² per plant minimum. Cramming 5 plants into 2 m² cuts per-plant output by up to 50%.
3. Confusing total area with planted area. Walking paths, uncovered soil, and planting gaps mean effective yield area is typically 70–85% of the bed's total footprint.
4. Not adjusting for succession planting. Lettuce (45-day cycle) planted three times in a spring season can yield 4–6 kg/m² instead of the default 2 kg/m².
5. Applying flat rates to first-year perennials. Asparagus yields near zero for the first 2 years; strawberries produce only 30–50% of mature-plant rates in year one.
6. Ignoring climate zone. USDA Zone 5 (~120 frost-free days) vs. Zone 9 (~250 days) directly affects how large tomato plants grow and how much fruit they set before frost.

Worked Example — Tomato Raised Bed

Crop: Tomato (indeterminate variety)

Planted area: 10 m²

Yield rate: 3 kg/m² (home-garden average, full sun)

Expected yield = 3 kg/m² × 10 m² = 30 kg/season

30 kg/season (≈ 66 lbs) — enough for ~100 portions of fresh tomatoes or about 25–30 jars of sauce

Frequently asked questions

How many kg of tomatoes can I get per square meter in a home garden?

Home garden tomato yields average 2.5 to 4.0 kg per m² per season for indeterminate (vining) varieties. Bush/determinate types average 1.5–2.5 kg/m². These figures assume full sun (6+ hours/day), consistent watering, and basic fertilization. Commercial USDA benchmarks are 8–10 kg/m² and should NOT be used for home garden estimates.

What is the formula to calculate vegetable garden yield?

Expected Yield (kg) = Yield Rate (kg/m²) × Planted Area (m²). The yield rate is the average production for a given crop under standard home-garden conditions. For example: tomatoes at 3 kg/m² × 10 m² = 30 kg/season. Each crop has a different rate — see the reference table above.

Do raised beds produce more than in-ground gardens?

Yes. University extension research (Penn State, Cornell) shows raised beds yield 20–30% more per m² than in-ground plots. Better drainage, looser soil, faster warming in spring, and easier weed/pest management all contribute. A tomato bed producing 3.0 kg/m² in-ground might yield 3.6–3.9 kg/m² in a quality raised bed mix.

Does this calculator account for succession planting?

The default yield rates reflect a single planting cycle. Crops like lettuce, radishes, and spinach can be planted 2–4 times per season. If you succession-plant lettuce (45-day cycle) three times in spring, your effective yield can reach 4–6 kg/m² instead of the default 2 kg/m². Multiply the single-cycle rate by the number of planned successions.

How much garden area does a family of four need to grow their summer vegetables?

The USDA suggests approximately 200–400 sq ft (18–37 m²) of mixed vegetables per person for a significant share of summer produce. A family of four with 50–75 m² of mixed crops (tomatoes, beans, squash, greens) can realistically produce 200–350 kg of produce per season — a meaningful supplement but not a full dietary replacement.

What crops yield the most per square meter for small gardens?

For maximum kg/m² in limited space: squash/zucchini (3.5–5.5 kg/m²), indeterminate tomatoes on trellises (up to 4.0 kg/m²), and cucumbers on vertical supports (up to 3.5 kg/m²). Vertical growing for vining crops effectively doubles usable area. Avoid pumpkins, melons, and corn in small plots — they have poor yield-per-footprint ratios.

How does USDA Plant Hardiness Zone affect expected yield?

Your USDA zone determines frost-free days, which cap your growing season. Zone 5 (e.g., Chicago) has ~120–150 frost-free days; Zone 9 (e.g., Phoenix) has 240–270. In shorter-season zones, indeterminate tomatoes may only reach 50–70% of their potential yield before frost, effectively dropping averages from 3.0 to 1.5–2.0 kg/m².

Are yields in this calculator in kilograms or pounds — and how do I convert?

Results are in kilograms (kg). To convert to pounds, multiply by 2.205. Example: 30 kg tomatoes ≈ 66.2 lbs. To convert your area from square feet to m²: divide by 10.764. A standard 4×8 ft raised bed (32 sq ft) ≈ 2.97 m², enter as 3 m².

Why is my actual harvest lower than the calculator predicts?

The most common causes: (1) insufficient sunlight — yields drop 30–50% with less than 6 hours of direct sun; (2) inconsistent watering — tomatoes need ~2.5 cm/week; (3) soil nutrient deficiency — a basic soil test from a county extension office can reveal pH or N-P-K imbalances; (4) pest or disease loss, which the USDA estimates reduces home harvests by 10–25% on average.

Can I use this calculator for herbs like basil or cilantro?

Herbs have much lower fresh-weight yields than vegetables. Basil yields roughly 0.3–0.6 kg/m² per season; cilantro 0.2–0.5 kg/m². These are below the calculator's minimum crop options, but you can use the default 2 kg/m² and then divide by 4–6 for a rough herb estimate. For basil specifically: 0.5 kg/m² × 1 m² = 500 g fresh, equivalent to ~50 recipe servings.

Sources & references

Methodology & trust

Editorial

jardineria calculator with its formula verified automatically against USDA National Agricultural Statistics Service — Vegetables Summary, per our editorial policy and methodology.

Updates

Updated: June 2026. Parameters are verified periodically against the cited sources.

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Calculations run 100% in your browser. We do not store or transmit your data.

Limitations

Indicative results. For critical decisions, consult a professional.

📌 How to cite this calculator

Rodríguez, M. (2026). Vegetable Garden Yield Calculator — Expected Harvest by Crop. Hacé Cuentas. https://hacecuentas.com/en/garden-harvest-expected-kg

Content licensed under CC-BY 4.0 — reuse it citing the source with a link to Hacé Cuentas.

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