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IrriDesign – Irrigation Sizing Calculator

🌱 • 🚀 Agronomic precision

🎯 What is this calculator for?

It allows you to estimate water requirements and irrigation design values for your crop or garden, based on the scientific FAO-56 methodology and historical climate data (NASA POWER).

✓ FAO-56 methodology • ✓ Climate series > 20 years • ✓ Results in liters/day

You will obtain daily water consumption, design values and a consistent technical basis for irrigation system sizing, both for gardens and agricultural operations.

⬇️ Enter your plot data to start the calculation

☀️ ETo — Water required by the climate

FAO-56 Reference Evapotranspiration (ETo) Calculator

FAO-56 Reference Evapotranspiration (ETo) calculator, based on historical NASA POWER data. This value represents the reference climatic demand used to size the irrigation system under demanding conditions.

🌱 ETc — Water that plants need

FAO-56 Crop Water Demand Calculator (ETc)

Average ET reference: 10.85 mm/day

🔬 FAO-56 Technical mode · Professional sizing
Designed for technical irrigation projects where a consistent, conservative and justifiable calculation basis is required.
  • Conservative design criteria
  • Technically valid basis for reports and projects
Plant
⚠️ Technical note: Listed Kc values correspond to full development (FAO56). Cover (%) is automatically applied in the calculation. → If an already adjusted Kc is entered, set Cover = 100%.
Soil
Irrigation
Added sectors:

    📊 Results and Integrated Water Savings

    Resultados medios (condiciones normales)

    Demanda máxima de diseño (mes más exigente)

    🧮 Technical Calculation Report

    When the calculation goes beyond being merely indicative and it becomes necessary to document the criteria used, this option allows the results to be converted into a technical document in PDF format.

    • 📄 PDF Report
      Downloadable document containing the entered parameters, calculation criteria, and main technical results.
      Generated using a CAG (Context-Augmented Generation) approach, in which results are produced from structured data and explicit technical criteria.
    • 🔄 Unlimited Sectors
      Allows working on complete projects, with no restrictions on the number of sectors.
    • 🚀 Professional Access – 1 Month
      Up to 5 technical reports per day for 30 days. Ideal for a complete project or multiple professional assignments.

    This report does not replace an executive project, but provides a documented, consistent, and traceable technical basis to support design decisions, evaluation, and comparison of alternatives.

    40 €
    Request Technical Report


    AI + Human

    💡 Why is this calculation the basis of water–energy strategies in irrigation? (read more)

    In a pressurized irrigation system, the electricity bill is mainly determined by two concepts: contracted power and energy consumed during pumping.

    Ct = Power Hydraulic power
    P = γ · Q · H / η

    Depends on flow rate (Q)
    and pressure head (H)     × power price + Energy Pumping energy
    E = γ · V · H / η

    Depends on total volume (V)
    and pressure head (H)     × energy price

    Oversizing leads to a permanent energy cost increase. Efficiency is defined in the hydraulic design.

    The three key levers are: pressure (H), flow rate (Q), and applied volume (V).

    🔍 Critical point identification
    Detect sectors requiring higher pressure head and optimize layout, pipe diameters, and zoning.
    💧 Low-pressure design
    Reducing H linearly decreases installed power and energy consumed over the system’s lifetime.
    🌱 Localized irrigation
    Allows operation with lower pressures and flow rates, increasing hydraulic efficiency compared to sprinklers.
    📍 Proper zoning
    Limiting simultaneous flow reduces required power and prevents oversizing pumping groups.
    ⚡ Application efficiency
    Applying water where the crop actually benefits reduces total pumped volume and energy consumption.
    📉 Adjusted doses
    Adjusting doses to the crop’s real needs prevents structurally oversized irrigation.

    In summary: a rigorous calculation of ET₀ and ETc allows proper sizing of the irrigation system and avoids unnecessary energy costs.

    ℹ️ Technical scope of the tool (read more)
    This tool is situated in the irrigation analysis and sizing phase, where the crop water requirements and the system design criteria are defined, based on the interaction climate ∞ soil ∞ plant.

    Calculations are based on the FAO-56 methodology, defined in the FAO Irrigation and Drainage Paper No.56 , using reference evapotranspiration (ET₀), crop coefficients (Kc), and a simplified soil water balance to estimate:
    • daily crop water demands (ETc),
    • irrigation volumes and depths,
    • irrigation intervals compatible with soil retention capacity,
    • and design values with low risk of water deficit.
    These results provide a valid technical basis for hydraulic design, comparison of alternatives, and decision-making in irrigation projects, both for gardens and agricultural operations.

    Infographic of the precision agriculture pyramid showing three levels: Farmer experience at the base, Scientific base at the intermediate level, and Precision irrigation at the top, with sensors, data, and smart technology. Real-time irrigation operational scheduling, advanced automation, or the implementation of digital irrigation twins correspond to a later phase, where soil, plant, and climate sensors, real-time data, and specific management criteria are integrated.

    Infographic showing the evolution of agriculture from Agriculture 1.0 with gravity irrigation to Agriculture 5.0 with precision irrigation, artificial intelligence, IoT, sensors, and machine learning These advanced phases require a personalized approach and are part of specific professional services, developed according to the crop, existing infrastructure, and production objectives.
    Most professional irrigation projects start with proper sizing.
    Kit IoT de riego de precisión con estación meteorológica, sensores de humedad del suelo y dashboard en la nube

    Componentes y accesorios de reutilización de agua

    Descubre los elementos que complementan los ecosistemas HarmonyBio

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    💧 Professional Reuse Services

    From Analysis to Real Implementation
    Audits, design, and installation of complete systems

    📋
    Technical Audit
    🔧
    Design and Installation
    ⚙️
    Maintenance

    ✅ Regulatory Compliance • ✅ Tanks and Filters • ✅ Technical Guarantee

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