Enter your tray dimensions, microgreens variety, and sow density to calculate exactly how much seed you need and your expected harvest. The Microgreens Yield Calculator returns total seed weight, expected yield per tray, and a full cost-and-revenue breakdown so you can plan your grow with confidence.
Total Seed Needed
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Seed Per Tray
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Total Estimated Yield
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Estimated Revenue
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Total Costs
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Gross Profit
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Profit Margin
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Enter your tray dimensions (width and length in cm), choose your microgreens variety, and the calculator converts the tray area into square feet. It then multiplies that area by the sow density (grams per square foot) and applies your safety margin to give you the total seed weight needed. Expected yield is scaled from the per-tray figure you enter.
Sow density is the weight of seed spread per square foot of tray surface. It varies significantly by variety — small seeds like broccoli or basil need only 10–15 g/sqft, while large seeds like sunflower or pea shoots need 100–150 g/sqft. The calculator auto-fills a typical value when you select a variety, but you can override it with your own tested rate.
Germination rates are never 100%, and some seeds may be lost to clumping, poor moisture, or environmental variation. A safety margin of 5–15% ensures you sow enough seed to achieve a full, even canopy even if a portion doesn't sprout. Commercial growers often use 10% as a standard buffer.
The calculator scales the per-tray yield you enter by the ratio of your actual tray area to a standard 10×20-inch (25×50 cm) flat. If your trays are larger or smaller, the yield estimate adjusts proportionally. Multiply by the number of trays for your total harvest estimate.
A standard 10×20-inch flat typically yields 150–300 g (5–10 oz) depending on variety. Dense crops like sunflower and pea shoots can yield 300–500 g, while finer crops like basil or amaranth yield closer to 100–150 g. Your growing medium, light, watering, and harvest timing all affect the final weight.
Yes. Enter the number of trays you plan to grow each cycle along with your seed cost and selling price to get a full profit projection. The per-tray summary table helps you track seed usage and margins across your entire batch, making it useful for both small home operations and larger commercial grows.
The default sow density values are based on widely published recommendations from experienced microgreens growers and seed suppliers. They represent middle-range values for each variety — actual optimal densities can vary by seed lot, growing medium, and target canopy thickness. Always adjust based on your own trials.
Divide the total grams needed by 453.6 to get pounds. For example, 500 g ÷ 453.6 ≈ 1.1 lbs. Most seed suppliers sell by the pound or ounce, so knowing your total gram requirement lets you order the right quantity without waste or shortfall.