NPK Calculator.
Turn a target N-P-K application rate into straight-fertilizer quantities, an equivalent blend grade and an indicative cost per hectare. Supplier-neutral scoping tool — refine against soil and leaf analysis.
How do you calculate an NPK blend?
An NPK blend is built by converting the target N-P₂O₅-K₂O ratio into kilos of each straight fertilizer, then balancing the blend so each nutrient hits its target rate per hectare without over-applying phosphate or potash.
- Nutrient targets are expressed as N, P₂O₅ and K₂O per hectare.
- P₂O₅ × 0.436 = elemental P; K₂O × 0.83 = elemental K.
- Blending straights is usually cheaper than a pre-mixed compound at scale.
- Check compatibility before blending — urea and some sources cake or react.
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.
Programme inputs
Indicative only. Straight-fertilizer grades and bulk prices vary by origin, packaging and incoterm.
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.
Send these numbers to the RFQ Builder
The numbers below were calculated with SeedMatchGroup's NPK Calculator. Indicative — the specialist will confirm scope before contacting suppliers.
13 inputs · assumptions · results
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 system (soil, substrate, hydroponic) and plant density
- Water quality and treatment needs (EC, pH, iron, hardness, pathogens)
- Fertigation strategy, dosing accuracy and drain recirculation
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 fertilizer blend supply 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.
- The scale you modelled (m², ha, t/h or units) and the CAPEX band it produced
- Which cost lines are in scope for the supplier and which you handle locally
- Specification level: basic, mid-tech or high-tech / fully automated
- Currency, budget approval status and funding source
- Timeline: decision date, delivery window and commissioning target
- Country of installation, import duties and local content requirements
- Operating assumptions you need validated (yield, energy, labour)
- Your calculator output or internal budget sheet
- Any feasibility study, business plan or board budget approval
Opens the RFQ Builder with your cost assumptions attached so suppliers price against the same scope you modelled. 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.