Examples
Examples
Try the starting example
- Field area (ha)
- 1
- Target established plants per m²
- 10
- Measured germination (%)
- 100
- Expected emergence of germinated seed (%)
- 100
- Thousand-seed mass (g)
- 50
- Target established plants
- 100000
- Seeds to supply
- 100000
- Required seed mass (kg)
- 5
- Seed mass per hectare (kg/ha)
- 5
Try another scenario
- Field area (ha)
- 0.5
- Target established plants per m²
- 20
- Measured germination (%)
- 80
- Expected emergence of germinated seed (%)
- 50
- Thousand-seed mass (g)
- 40
- Target established plants
- 100000
- Seeds to supply
- 250000
- Required seed mass (kg)
- 10
- Seed mass per hectare (kg/ha)
- 20
Calculation method
Calculation method
Target established plants
Area in hectares × 10,000 × target plants per m².
Seeds to supply
Round up target plants / (germination fraction × emergence fraction).
Required seed mass (kg)
Seed count × thousand-seed grams / 1,000,000.
Seed mass per hectare (kg/ha)
Required seed mass / field hectares.
Symbols and units
- a
- Field area (ha)
- b
- Target established plants per m²
- c
- Measured germination (%)
- d
- Expected emergence of germinated seed (%)
- e
- Thousand-seed mass (g)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Planning arithmetic under your chosen established-population target and measured seed mass. Germination and subsequent emergence are separate multiplicative assumptions. It does not recommend a crop target, placement depth or seeder setting.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
University of Minnesota Extension: planting equipment calibration ↗
Background reading; this does not imply endorsement or independent review of SumFizz.