Seeding Rate Calculator

Seeding Rate Calculator

Establishing a crop with high yield potential and quality requires sowing seed at ideal rates. Use the calculator below to determine appropriate seeding rates based on various agronomic and seed quality factors. 

Seeding Rate Calculator

* Required
  • Spring Wheat (CPSR, CWRS, CWSWS, CWSP, and CNHR): 25-40 seeds/ft2
  • Barley (malt and feed): 20-40 seeds/ft2
  • Winter Wheat: 45 seeds/ft2
  • Durum: 28-40 seeds/ft2
  • Barley Silage: 30-45 seeds/ft2
  • Solid-Stemmed Wheat (not durum): 30 seeds/ft2

Not every seed sown will result in a viable plant. Emergence mortality must be factored into desired seeding rates. Emergence mortality of 10% is often seen in cereal crops. It’s important to note that this new calculator differs from other seeding rate calculators. Instead of targeting plants/ft2, this calculator targets seeds/ft2. Therefore, emergence mortality is not included in the calculation. The desired seeding rate indicates the number of seeds sown. Farmers should use desired seeding rates that account for expected emergence mortality.

* Required

Good quality seed will have a germination rate of 90-99%. It is recommended that all seed lots intended for planting should be tested at an accredited lab. Click here to learn more.

* Required

Typical TKW ranges:

  • Barley: 40-55 g/1000 seeds
  • Spring Wheat: 35-45 g/1000 seeds
  • Winter wheat: 30-40 g/1000 seeds
  • Durum: 40-50 g/1000 seeds

Please remember it is very important to use the TKW of the seed lot you intend to plant. This can be obtained from your seed grower or an accredited lab.

Note: The field below is not required unless you are looking to calibrate your seeder.

Note: The fields below are not required unless you are looking to calculate the seed cost.

Seeding Rate

lbs seed/acre to obtain seeds/ft2

Your seeder must be calibrated so each opener drops

This is equivalent to

The cost of the seed will be

Note: That the number of sown seeds that germinate, emerge and survive to become an established crop can be impacted by a number of factors such as soil crusting, poor vigour, poor seed/soil contact, biotic/abiotic stresses, etc.