Calculate seed requirement based on plant spacing, row spacing, 1000-grain weight and germination rate.
Calculate your exact seed requirement in seconds. Enter field area, plant spacing, row spacing, 1000-grain weight, and germination rate to get plants per hectare, total seeds needed, and seed weight in kilograms. No more guessing — plant the right population for maximum yield.
You planted 30 kg of corn seed last spring only to find 20% empty patches at emergence. The germination test said 85%, but you planted as if it were 100%. That mistake cost you 12 bushels per acre. This calculator accounts for germination rate automatically, so you always seed the right amount.
Enter your field area in hectares, the desired in-row and between-row spacing in centimeters, the thousand-grain weight in grams, and the expected germination rate percentage. Click "Calculate" to see the number of plants per hectare, total seeds needed, and seed weight in kilograms.
The seed calculator helps you determine the exact amount of seed needed for your field based on plant spacing, thousand-grain weight, and germination rate. Proper seed calculation ensures optimal plant density, maximizes yield potential, and avoids wasting expensive seed.
A: Thousand-grain weight (TGW) is the weight in grams of 1000 seeds. It varies by crop and variety: wheat typically 30-50g, corn 250-350g, rice 20-30g. You can find this on seed bags or measure it yourself.
A: If seed has 90% germination, you need 11% more seed than the theoretical plant count to achieve target density. Using seed with low germination without adjusting rates leads to poor stands and reduced yield.
A: Multiply plants per hectare by 0.4047 to get plants per acre. For example, 50,000 plants/ha × 0.4047 = 20,235 plants/acre.