Seed Germination and Seeding Rate Calculator
Calculate how many seeds to plant per acre to achieve your target plant stand, accounting for germination rate and field emergence losses.
Why Seeding Rate Matters Planting too few seeds means below-optimum plant population and lost yield. Planting too many wastes expensive seed and can cause competition between plants. The goal is to achieve a target final stand from your seed quality and field conditions.
The Formula Seeds to plant = Target plants per acre / (Germination% x Field emergence factor) Field emergence is typically 85-95% for row crops in good conditions — lower in wet or cold soils.
Germination Rate Seed tags report germination rate from controlled lab tests. Field germination is usually 5-15% lower. Older seed loses viability. Test germination at home by placing 10 seeds on a damp paper towel for 5-7 days and counting sprouts.
1000-Seed Weight Seed rate is sometimes expressed in lbs/acre. Convert: lbs/acre = (seeds/acre x 1000-seed weight in grams) / (453,592)