Irrigation & Fertilizer Sizing Calculator.
Size peak water demand, system flow, zone count, storage volume and season fertilizer quantities with an indicative fertigation injection rate. Planning output only — built to make an irrigation and fertilizer RFQ comparable.
How do you size an irrigation system and season fertilizer quantity?
Peak daily demand (m³/day) = hectares × peak crop water use (mm/day) × 10 ÷ system efficiency, and required flow (m³/h) = daily demand ÷ available irrigation hours. Season fertilizer quantity is the target N, P₂O₅ and K₂O rate per hectare × area, divided by assumed nutrient use efficiency.
- 1 mm of water over 1 ha = 10 m³.
- Planning efficiency: drip 85–92%, sprinkler 70–85%, surface 50–65%.
- Zone count = required flow ÷ maximum flow per zone, rounded up.
- Injection rate (L/h) = daily nutrient mass ÷ stock concentration ÷ irrigation hours.
- Indicative sizing only — not an agronomic or hydraulic design.
Estimate only — not a quotation. Outputs are indicative planning ranges based on the values you enter and typical commercial benchmarks. Real pricing, specifications and lead times vary by country, site conditions and supplier, and are confirmed only in written offers collected through a private RFQ.
Irrigation inputs
ETc at the highest-demand growth stage
Fertilizer inputs
Indicative only. Excludes hydraulic pipe sizing, emitter selection, water quality treatment, filtration grade and soil-test-based agronomy. Season water applies a peak-to-season derate and should be replaced by monthly ETc data at design stage.
Turn this estimate into a project brief
Send these figures to the greenhouse RFQ form. Your inputs and results are attached to the brief, a sourcing specialist reviews it, and only then are suitable suppliers or project partners approached.
Send estimate to the RFQ formBuying more than once? Save these project details to your buyer profile so your site, crop, budget and timeline are pre-filled on every future request.
Indicative only. Not financial advice, not agronomic advice, not engineering design. Final numbers require supplier, agronomist, engineer and local regulatory review.
Turn this estimate into a qualified project
SeedMatchGroup is a supplier-neutral platform. We do not manufacture or resell equipment — we help buyers specify the project correctly, open one private RFQ to qualified global manufacturers, integrators and EPCs, and introduce relevant financing tracks.
Frequently asked questions
What can change the result?
This is a preliminary planning estimate based on the values you entered. The variables below usually move the outcome most, and should be confirmed with an agronomist, engineer and supplier offers before final design.
- Crop and cultivar — water, climate and support requirements differ per crop
- Growing area and layout — hectares alone are not a greenhouse specification
- Irrigation design, emitter spacing and application efficiency
- Fertigation strategy, dosing accuracy and drain recirculation
- Water quality and treatment needs (EC, pH, iron, hardness, pathogens)
Questions this calculator answers
Typical buyer and investor searches this tool is built for, including the markets where we run the most commercial projects.
- fertigation head station sizing and cost per hectare for a commercial project
- fertigation head station sizing and cost for a 2-hectare project — India
- fertigation head station sizing and cost: indicative planning ranges — Kenya
- fertigation head station sizing and cost benchmarks for investors — Saudi Arabia
- fertigation head station sizing and cost under local market conditions — Mexico
- fertigation head station sizing and cost — what to specify in a supplier RFQ
Tell us five things and we route your brief
These fields decide which specialist and which suppliers see your request. Nothing is submitted here — your answers are carried into the private RFQ.
SeedMatchGroup works on commercial projects from USD 250K. Smaller budgets are still reviewed, but sourcing depth is limited.
A sourcing specialist shortlists reviewed providers for your scope and returns comparable offers. Supplier details stay with us — all communication runs through SeedMatchGroup.
Estimate only: these figures are indicative planning numbers, not a quotation. Final pricing, specifications and lead times come from supplier offers after your brief is reviewed.
Plan the project around the numbers
A calculator output is a starting point. Pair it with the planning guides below to align timeline, irrigation, budget and risk before you launch an RFQ.
One private brief, specialist review, private supplier research and a like-for-like comparison.
Month-by-month schedule from concept to first harvest across 9 stages.
Design principles for drip, pivot, fertigation and filtration on commercial projects.
How CAPEX, working capital and operating cost drive the project business case.
The ten most expensive planning and procurement pitfalls — and how to avoid them.
Procurement answers behind these numbers
A model output only holds if the scope, contract route and delivery terms match the assumptions. These reference answers cover the commercial decisions that move the figure.
- Turnkey EPC vs separate equipment packages
- What belongs in a greenhouse equipment specification
- Normal payment milestones in equipment contracts
- Which Incoterms to use for greenhouse and irrigation equipment
- How long a commercial greenhouse takes from order to handover
- What is normally the owner's scope on a greenhouse project
Move irrigation & fertilizer sizing calculator. into a structured RFQ
Editorial · not a sales pitchCalculator outputs are indicative. When your numbers stabilise, a supplier-neutral RFQ turns those estimates into comparable offers from verified providers.
The facts a complete, supplier-neutral request on this topic includes. Use it as a checklist before submitting.
- Irrigated area, block layout and topography/elevation change
- Crop, spacing and peak daily water requirement (mm/day or m³/day)
- Water source (borehole, canal, reservoir, municipal) with yield and analysis
- System type: drip, sprinkler, pivot, micro-sprinkler, fertigation
- Required flow (m³/h), pressure and number of zones/shifts
- Power availability: grid, generator or solar pumping
- Automation and control level required
- Water analysis report and borehole test results
- Field/plot map with dimensions and elevation
Opens the RFQ Builder scoped as an irrigation package so suppliers quote hydraulics, filtration and dosing consistently. You stay in control — nothing is submitted until you review and confirm.
Free to submit · supplier-neutral · reviewed by a specialist before any supplier is contacted.
Running these numbers for a client project?
Agronomists, greenhouse and irrigation consultants use this calculator for feasibility, then hand the project to us for supplier shortlisting, RFQ preparation and quote comparison. You stay client-facing and we work through you.
Your client relationship stays with you — we work through you and never contact your client unless you ask.
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 David / SeedMatch Group, and supplier introductions are made only after internal approval.