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Seed Quantity Per Acre Calculator

Work out seed quantity per acre instantly with clear inputs, formula shown and shareable results.

About Seed Quantity Per Acre Calculator

Recommended seed rates assume near-perfect germination, so the quantity actually bought must be scaled up by 100 / germination percentage to hit the target plant stand. Multiplying by area gives the purchase quantity, and by seed price the input cost for the season.

Formulas

Seed quantity

Label quantity = area x seed rate

Germination adjustment

Seed required = label quantity x 100 / germination %

Worked example

With the default values below, Seed Quantity Per Acre Calculator returns Seed Required (germination-adjusted) of 235.29. Change any input above and every figure here is recalculated in your browser.

Inputs used

Area To Sowminimum 0.01 acre
5 acre
Recommended Seed Rateminimum 0.1 kg/acre
40 kg/acre
Germination Percentageaccepts 1–100 %
85 %
Seed Priceminimum 0 per kg
60 per kg

Results

Seed Required (germination-adjusted)
235.29
Seed At Label Rate
200.00
Number Of 25 kg Bags
9.41
Total Seed Cost
$14,117.65

Step by step

  1. 1Values used
  2. 2Seed quantity
  3. 3Germination adjustment
  4. 4Seed Required (germination-adjusted)= 235.29
  5. 5Seed At Label Rate= 200.00
  6. 6Number Of 25 kg Bags= 9.41
  7. 7Total Seed Cost= 14,117.65

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Should I also allow for gap filling?

For transplanted crops keep 5-10% extra nursery stock for gap filling. For direct-seeded crops the germination adjustment normally covers it.

Where do I find the germination percentage?

It is printed on the certified seed tag along with purity and the test date. Germination falls with age and poor storage, so use a fresh tag figure or run a 100-seed tray test.

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