Farming & agriculture
Crop seeding rate Calculator
Convert target plants and thousand-seed weight into seed quantities. This free crop seeding rate calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Convert target plants and thousand-seed weight into seed quantities.
Calculated outcomes
- Seeds M2
- 350.88 seeds/m²
- Seed Cost
- €1,105.26
Assumptions and estimates
- Method: Seeds/m² = target plants ÷ (germination × establishment). kg/ha = seeds/m² × thousand-seed weight ÷ 100.
- Target plant population and establishment must come from crop-specific guidance and field conditions. Seed treatment, varieties and sowing restrictions are excluded.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the crop seeding rate calculation works
Seeds/m² = target plants ÷ (germination × establishment). kg/ha = seeds/m² × thousand-seed weight ÷ 100.
Target plant population and establishment must come from crop-specific guidance and field conditions. Seed treatment, varieties and sowing restrictions are excluded.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review seed kg ha and total seed kg, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Target established plants per m²
- 300
- Thousand-seed weight (g)
- 45
- Tested germination (%)
- 95
- Field establishment of germinated seeds (%)
- 90
- Field area (ha)
- 10
- Seed price (€/kg)
- 0.7
- Seed Kg Ha
- 157.89 kg/ha
- Total Seed Kg
- 1,578.95 kg