Seed ROI & Rate Calculators
Two free tools used by commercial seed buyers worldwide. Estimate the profitability of a planting programme and calculate how much seed you actually need per hectare — accounting for germination, target plant density and field loss.
Estimate profit & ROI
Plug in your seed cost, expected yield and market price — get net profit, ROI and break-even.
Realistic — long-term regional average
Modelling Tomato on 100 ha.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
How much seed do you need?
Calculates seeds/ha and kg/ha from target plant density, TSW, germination and field loss.
Realistic — long-term regional average
Tomato on 100 ha — adjust TSW and density to match the supplier's technical sheet.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Plants per hectare
From row × in-row spacing, get plants/m² and plants/ha.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Estimate total harvest
Multiply plants/ha × grams/plant to project tonnes/ha and total yield.
Realistic — long-term regional average
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Germination & pure-live seed
Verify a supplier's germination claim from your test tray, and get the PLS %.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Weekly water requirement
Net vs gross irrigation demand in mm and m³, accounting for rainfall and system efficiency.
Realistic — long-term regional average
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
NPK → Urea / DAP / MOP
Convert N-P-K target rates into kg of urea, DAP and MOP per hectare and total.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Convert dimensions to hectares
Length × width → m², hectares and acres.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Is my climate right for this crop?
Compare your growing-season temperature and rainfall against agronomic ranges for major field crops.
Ideal ranges — Tmin 10–22°C · Tmax 25–33°C · Rain 500–900 mm.
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Growing paddy? Rice seed rate & yield calculator — inbred vs hybrid, direct seeding vs transplanting, kg/ha and seed cost per tonne.
Planning the water side? What is drip irrigation? — components, efficiency benchmarks and fertigation basics, then size it with the greenhouse irrigation planner.
Get matched with the right seed supplier
Once you know your seed budget and quantity, a dedicated sourcing specialist — supported by our proprietary matching technology — identifies independent breeders worldwide and returns private, side-by-side quotes. Free for buyers.