{
  "slug": "fertilizer-blend",
  "title": "Fertilizer Blend & NPK Rate Calculator",
  "heading": "Fertilizer NPK Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/fertilizer-blend",
  "summary": "Product pounds needed to hit an N-P-K target per acre.",
  "description": "Enter your nutrient targets and the analysis printed on the bag to get the product rate per acre, total tonnage, and cost per unit of nitrogen.",
  "formula": "Product lb/acre = nutrient lb/acre ÷ (analysis % ÷ 100).",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=fertilizer-blend",
  "inputs": [
    {
      "id": "nTarget",
      "label": "Nitrogen target",
      "kind": "number",
      "hint": null,
      "default": 160,
      "unit": "lb N/acre",
      "min": 0,
      "max": null
    },
    {
      "id": "nPct",
      "label": "Product nitrogen",
      "kind": "number",
      "hint": null,
      "default": 46,
      "unit": "%",
      "min": 1,
      "max": 100
    },
    {
      "id": "pTarget",
      "label": "Phosphate target",
      "kind": "number",
      "hint": null,
      "default": 60,
      "unit": "lb P₂O₅/acre",
      "min": 0,
      "max": null
    },
    {
      "id": "pPct",
      "label": "Product phosphate",
      "kind": "number",
      "hint": null,
      "default": 46,
      "unit": "%",
      "min": 1,
      "max": 100
    },
    {
      "id": "acres",
      "label": "Acres",
      "kind": "number",
      "hint": null,
      "default": 160,
      "unit": null,
      "min": 0.1,
      "max": null
    },
    {
      "id": "nPrice",
      "label": "N product price",
      "kind": "number",
      "hint": null,
      "default": 520,
      "unit": "$/ton",
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "nRate",
      "label": "Nitrogen product (lb/acre)",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "pRate",
      "label": "Phosphate product (lb/acre)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "nTons",
      "label": "Nitrogen product needed (tons)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "nCost",
      "label": "Nitrogen cost",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "costPerLbN",
      "label": "Cost per pound of N",
      "format": "currency",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Nitrogen target: 160 lb N/acre",
      "Product nitrogen: 46 %",
      "Phosphate target: 60 lb P₂O₅/acre",
      "Product phosphate: 46 %",
      "Acres: 160",
      "N product price: 520 $/ton"
    ],
    "outputs": [
      "Nitrogen product (lb/acre): 347.8",
      "Phosphate product (lb/acre): 130.4",
      "Nitrogen product needed (tons): 27.83",
      "Nitrogen cost: $14,470",
      "Cost per pound of N: $0.565"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter nitrogen target (lb N/acre).",
      "Enter product nitrogen (%).",
      "Enter phosphate target (lb P₂O₅/acre).",
      "Enter product phosphate (%).",
      "Enter acres.",
      "Enter n product price ($/ton).",
      "Read your nitrogen product (lb/acre) on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "nTarget": 95,
        "nPct": 28,
        "pTarget": 35,
        "pPct": 28,
        "acres": 96,
        "nPrice": 310
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "nTarget": 160,
        "nPct": 46,
        "pTarget": 60,
        "pPct": 46,
        "acres": 160,
        "nPrice": 520
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "nTarget": 255,
        "nPct": 74,
        "pTarget": 95,
        "pPct": 74,
        "acres": 256,
        "nPrice": 830
      }
    }
  ],
  "limitations": [
    "Estimates assume standard, average conditions — local rules, pricing, and materials vary.",
    "Results are rounded for readability; add a buffer before ordering, booking, or committing.",
    "Double-check anything with a real cost attached against a local quote."
  ],
  "faq": [
    {
      "q": "Why compare cost per pound of N?",
      "a": "Bag prices are meaningless across analyses. Urea at 46% and UAN at 32% only compare once you price the actual nutrient."
    },
    {
      "q": "Does this handle blends?",
      "a": "Run each nutrient separately, then have the retailer blend to the rates shown."
    }
  ],
  "related": [],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Fertilizer Blend & NPK Rate Calculator (https://www.revenuelab.fyi/toolbox/fertilizer-blend)"
}