How do you calculate yield per square foot in a greenhouse?

Divide harvested fresh weight by the productive canopy area you actually harvested, then multiply by 100 to express it per 100 sq ft. With 8 lb off 250 sq ft you get 8 ÷ 250 × 100 = 3.2 lb per 100 sq ft.

What is a good yield per square foot for leafy greens?

It varies by crop and lighting. Lettuce in a high-light glasshouse often runs 4-6 lb per 100 sq ft per cycle, while the 3.2 lb per 100 sq ft in our example sits below a 3.5 target, leaving a 0.3-point gap to close.

Why use canopy area instead of total floor area?

Total floor area includes aisles, walkways, and equipment that never grow anything. Using only productive canopy area harvested gives a true crop-productivity number you can compare across rooms with different layouts.

Yield per square foot vs yield per plant — which matters more?

Yield per plant tells you cultivar vigor; yield per square foot tells you space economics. Space is your scarcest resource in a greenhouse, so for facility-level decisions the per-square-foot number wins.

How do I close a gap to my yield target?

A negative gap like our 0.3 points usually traces to plant density, light delivery, or transplant losses. Audit spacing and PPFD uniformity first, since those move yield per square foot faster than nutrient tweaks.

Does this work for vertical farms with stacked tiers?

Yes, but count each tier's canopy separately. Sum the harvested fresh weight and the harvested canopy across tiers, or the stacked productivity will be hidden in a single-layer footprint.

Greenhouse, Indoor Farming & Agri-Processing calculator

Yield per square foot calculator

Yield per square foot is the single most important productivity metric in controlled-environment agriculture: it tells you how many pounds of saleable fresh weight each unit of canopy space produces. Greenhouse growers, vertical-farm operators, and produce-business owners use it to compare crops, cultivars, and rooms on an apples-to-apples basis regardless of facility size. Because greenhouse space is expensive to heat, light, and irrigate, every square foot has to pull its weight, and this ratio is what flags an underperforming bay before it quietly drains a season's margin. Tracking it harvest-over-harvest also exposes problems like poor light uniformity, transplant gaps, or a cultivar that simply does not pencil out.

What this calculator does

Calculate harvested yield per square foot of canopy and the gap to your target so growers can benchmark a crop, room, or rack against the production plan and decide whether climate, light, nutrient, or genetics changes are needed.
Use it for end-of-cycle reviews on a leafy green or herb crop, comparing two grow rooms or rack tiers, or proving the production gain after a DLI, plant density, or cultivar change.
It computes achieved fresh-weight yield per 100 square feet of harvested canopy and the gap, in points, to your target.

Formula used

Achieved yield per 100 sq ft = harvested fresh weight ÷ productive canopy area harvested × 100
Gap to target yield = achieved yield per 100 sq ft − target yield per square foot

Inputs explained

Harvested fresh weight:
Productive canopy area harvested:
Target yield per square foot:

How to use the result

Use it after each harvest cycle to benchmark a crop, room, or cultivar against your yield target and against other production blocks.
It measures fresh weight per harvested area only — it ignores grade-out, shrink, light intensity, and cycle length, so a high yield-per-square-foot crop can still lose money if turns are slow or packout is poor.

Current U.S. benchmarks

U.S. housing starts run at 1,177k per year (Census, May 2026), down 8.7% from a year earlier, the demand driver for building products.
Industrial natural gas averages $4.9 per Mcf (EIA, Apr 2026), down 7.7% from a year earlier, with industrial electricity at 8.66 cents per kWh. Process heating and refrigeration budgets track both.

Common questions

How do you calculate yield per square foot in a greenhouse? Divide harvested fresh weight by the productive canopy area you actually harvested, then multiply by 100 to express it per 100 sq ft. With 8 lb off 250 sq ft you get 8 ÷ 250 × 100 = 3.2 lb per 100 sq ft.
What is a good yield per square foot for leafy greens? It varies by crop and lighting. Lettuce in a high-light glasshouse often runs 4-6 lb per 100 sq ft per cycle, while the 3.2 lb per 100 sq ft in our example sits below a 3.5 target, leaving a 0.3-point gap to close.
Why use canopy area instead of total floor area? Total floor area includes aisles, walkways, and equipment that never grow anything. Using only productive canopy area harvested gives a true crop-productivity number you can compare across rooms with different layouts.
Yield per square foot vs yield per plant — which matters more? Yield per plant tells you cultivar vigor; yield per square foot tells you space economics. Space is your scarcest resource in a greenhouse, so for facility-level decisions the per-square-foot number wins.
How do I close a gap to my yield target? A negative gap like our 0.3 points usually traces to plant density, light delivery, or transplant losses. Audit spacing and PPFD uniformity first, since those move yield per square foot faster than nutrient tweaks.

Last reviewed 2026-05-12.