{"uid":"cap_R3Wzhy1MqhBQK-jTCM1X4","slug":"garden-calculators-fertilizer-rate-calculator-cf61a96b","name":"Garden Calculators – Fertilizer Rate Calculator","description":"Fertilizer product needed for a nutrient target per 1000 sq ft from its N-P-K analysis, with the P and K delivered and bags.","url":"https://garden-calc.x402tookit.com/fertilizer-rate?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["analysis","areaSqFt","targetLbPer1000SqFt"],"properties":{"bagLb":{"type":"number","description":"Bag size in pounds, to count bags (default 50)"},"analysis":{"type":"string","description":"Fertilizer N-P-K analysis on the bag, for example 10-10-10 or 46-0-0 (percent N, P2O5, K2O)"},"areaSqFt":{"type":"number","description":"Area to fertilize in square feet, 1 to 10,000,000"},"nutrient":{"type":"string","description":"Target nutrient: n (default), p2o5 or k2o"},"targetLbPer1000SqFt":{"type":"number","description":"Pounds of the target nutrient wanted per 1000 sq ft, 0.05 to 10 (lawns often use 0.5 to 1 pound of N per application)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"analysis":{"type":["null","string"]},"areaSqFt":{"type":["null","number"]},"degraded":{"type":["boolean","null"]},"nutrient":{"type":["null","string"]},"bagsNeeded":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"totalDelivered":{"type":["null","object"],"properties":{"nLb":{"type":["null","number"]},"k2oLb":{"type":["null","number"]},"p2o5Lb":{"type":["null","number"]}}},"totalProductKg":{"type":["null","number"]},"totalProductLb":{"type":["null","number"]},"targetKgPerHectare":{"type":["null","number"]},"productKgPerHectare":{"type":["null","number"]},"productOzPer100SqFt":{"type":["null","number"]},"targetLbPer1000SqFt":{"type":["null","number"]},"deliveredPer1000SqFt":{"type":["null","object"],"properties":{"nLb":{"type":["null","number"]},"k2oLb":{"type":["null","number"]},"p2o5Lb":{"type":["null","number"]},"elementalKLb":{"type":["null","number"]},"elementalPLb":{"type":["null","number"]}}},"productLbPer1000SqFt":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_he8_u4MZBnQqjZ8GBj2Ob","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates the fertilizer product quantity needed to hit a target nutrient rate (N, P₂O₅, or K₂O) per 1000 sq ft, returning total product weight, bags needed, and actual nutrients delivered.","exampleAgentPrompt":"I have a 6,000 sq ft lawn and I want to apply 1 pound of nitrogen per 1000 sq ft — I'm using 46-0-0 urea in 50 lb bags. How much do I need and how many bags should I buy?","exampleUseCases":[{"title":"Lawn nitrogen application planning","prompt":"My lawn is 8,500 square feet and I want to put down half a pound of nitrogen per 1000 sq ft. I'm using a 28-0-3 fertilizer in 40 lb bags — how many bags do I need and how much product should I spread?"},{"title":"Vegetable garden phosphorus boost","prompt":"I have a 500 sq ft vegetable garden and want to apply 2 lbs of P2O5 per 1000 sq ft. I have a bag of 0-46-0 triple superphosphate — how many pounds of product do I need?"},{"title":"Potassium application for turf renovation","prompt":"I'm renovating a 12,000 sq ft sports field and need 1.5 lbs of K2O per 1000 sq ft. Using 0-0-60 muriate of potash in 50 lb bags — how many bags and how many total pounds of product?"}],"resultDescription":"Returns total fertilizer product weight in pounds and kilograms, ounces per 100 sq ft, kg per hectare, number of bags needed, actual N/P2O5/K2O delivered in pounds, plus a human-readable summary and agronomic disclaimer.","failureModes":["Invalid N-P-K analysis format (not in XX-XX-XX pattern) returns a validation error","Target nutrient rate outside allowed range (0.05–10 lbs/1000 sq ft) returns an error","Area outside allowed range (1–10,000,000 sq ft) returns an error","Unknown nutrient type string returns an error","Missing required parameters (analysis, areaSqFt, targetLbPer1000SqFt) returns 400-level error","Payment failure or insufficient USDC balance returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need to translate a fertilizer bag's N-P-K label into a precise product quantity for a given area and nutrient target. Ideal for lawn care agents, garden planning tools, or agricultural assistants that need to go from 'how much nitrogen do I want' to 'how many bags to buy and how much to spread.' Prefer this over generic agriculture APIs when you need bag-count output and multi-nutrient delivery accounting in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:15:02.254Z","isFirstParty":false,"canonicalSlug":"garden-calculators-fertilizer-rate-calculator-cf61a96b"}