Work out seed quantity per acre instantly with clear inputs, formula shown and shareable results.
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.
Seed quantity
Label quantity = area x seed rate
Germination adjustment
Seed required = label quantity x 100 / germination %
For transplanted crops keep 5-10% extra nursery stock for gap filling. For direct-seeded crops the germination adjustment normally covers it.
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.