Calculators
Seed Rate Calculator
Calculate seed quantity and optional cost from field area and kg/ha seed rate.
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Version 1.0.0 · Last reviewed
Tool
Result
Live output from your inputs
Enter values and calculate to see results.
How it worksShow guideHide guide
Introduction
Find how much seed you need (and optional cost) from field area and recommended seed rate.
Formula
Seed mass equals area in hectares times the seed rate per hectare.
- A_ha — Area in hectares
- s — Seed rate (kg/ha)
- S — Total seed required (kg)
Step-by-step
- Enter field area in hectares or acres.
- Enter seed rate in kg/ha.
- Optionally enter price per kg for a cost estimate.
Worked example
2 ha at 25 kg/ha needs 50 kg of seed; at $40/kg that is about $2,000.
Use cases
- Order seed before sowing
- Compare seed cost across plot sizes
- Adjust purchases when area changes
Frequently asked questions
Where do I get the seed rate?
Use the variety label, seed company guide, or local extension recommendation for your crop and spacing.
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