Planting Density and Seed Rate
Seeds and pounds per acre from row spacing, target population, germination, and seed price.
Example
You enter
- Row width (in) 30
- Target population / acre 32000
- Seeds per lb 1500
- Germination % 95
- Seed price ($/lb, optional) 4.5
You get
- Seeds / acre 33684
- Lbs / acre 22.46
- Cost / acre $101.05
Details, formula, and sources
Seeds per acre = target_population_per_acre / germination_pct. Lbs per acre = seeds_per_acre / seeds_per_lb. Cost = lbs × $/lb.
ASABE EP367 by name; USDA Cooperative Extension published seeding-rate guides.
USDA Extension materials free at most state-extension-service sites.
Read and follow the product label. The label is the law (FIFRA).
Field names used by the API: row_width_in, target_pop_per_acre, seeds_per_lb, germination_pct, seed_price_per_lb, seeds_per_acre, lbs_per_acre, cost_per_acre