Commercial Seed Sourcing Calculator
Work out the seed rate in kilograms per hectare from thousand-seed weight, target plant density, germination and field loss — then the seed cost per hectare from the landed price, and the return on the planting programme. The calculated volume is the figure to put in front of suppliers, because it is what makes their offers comparable. Free, no sign-up, and the result carries into a human-reviewed sourcing RFQ.
How do you calculate seed requirement and seed ROI?
Seed requirement is target plant density divided by germination and field-establishment factors, multiplied by thousand seed weight and area. Seed ROI compares the gross margin uplift of a variety against its seed cost per hectare.
- Seed rate (kg/ha) = (plants/ha ÷ (germination% × (1 − field loss%))) × TSW ÷ 1,000,000.
- Commercial germination on certified seed is normally 85–95%; field loss 5–15%.
- Seed ROI = (yield uplift × farmgate price − extra seed cost) ÷ extra seed cost.
- Seed is typically 3–8% of crop input cost but drives most of the yield outcome.
Looking for price bands rather than a calculation? The seed cost guide gives indicative price per kg by crop and seed class, and seed cost per hectare by crop.
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.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
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.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
Plants per hectare
From row × in-row spacing, get plants/m² and plants/ha.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
Estimate total harvest
Multiply plants/ha × grams/plant to project tonnes/ha and total yield.
Realistic — long-term regional average
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
Germination & pure-live seed
Verify a supplier's germination claim from your test tray, and get the PLS %.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
Weekly water requirement
Net vs gross irrigation demand in mm and m³, accounting for rainfall and system efficiency.
Realistic — long-term regional average
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
NPK → Urea / DAP / MOP
Convert N-P-K target rates into kg of urea, DAP and MOP per hectare and total.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
Convert dimensions to hectares
Length × width → m², hectares and acres.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
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.
Indicative only
- This tool is indicative only.
- It is not financial advice.
- It is not agronomic advice.
- It is not engineering design.
- Final numbers require supplier, agronomist, engineer and local regulatory review.
SeedMatch Group is an independent agricultural project sourcing and RFQ platform. We are not a farm, seed producer, fertilizer manufacturer, irrigation manufacturer, greenhouse builder, EPC contractor, lender or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.
Supplier and manufacturer listings are provided for research, transparency and discovery only. SeedMatch Group does not provide automatic buyer-supplier introductions. Every agriculture project request is reviewed manually by the SeedMatch project team, and supplier introductions are made only after internal approval.
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.
Buying vegetable seed? Vegetable seed cost calculator — seed quantity by crop and density, then effective cost per usable kilogram once germination and purity are applied.
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.
Related calculators and sourcing steps
- Working from spacing rather than seed rate? Use the plants per hectare calculator to convert row spacing into plant population.
- Once density is set, the fertigation calculator for injection ratios and tank sizing sizes the nutrient programme behind it.
- Before scaling a variety, request seed samples for a side-by-side local trial under your own soil and disease pressure.
Illustrative project summary
2 ha polytunnel expansion
An established open-field grower adds protected cropping with natural ventilation and drip irrigation.
2 ha · Single-span polytunnel · Leafy greens and herbs
Indicative full greenhouse project CAPEX
USD 575K – USD 1.3M
Illustration only, not a real project or quotation. This is the structure, equipment and site-works budget for the example greenhouse, not the price of this calculator’s individual system, seeds or inputs, and not a result calculated from your entries. Excludes land, permits, packhouse, financing costs and working capital.
Based on the published commercial greenhouse cost benchmark. Written offers require a private project review; commercial projects start from USD 250K.