{"uid":"cap_Jpr4xXGnH80_lAQa6euYK","slug":"concrete-slab-volume-calculator-621df995","name":"Concrete Slab Volume Calculator","description":"Concrete for a slab: cubic yards with waste, ready-mix order size and the number of 40, 60 or 80 lb bags of mix.","url":"https://construction-calc.x402tookit.com/concrete-volume?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":["lengthFt","widthFt","thicknessIn"],"properties":{"widthFt":{"type":"number","description":"Slab width in feet"},"lengthFt":{"type":"number","description":"Slab length in feet"},"wastePct":{"type":"number","description":"Waste and spill allowance, default 10"},"thicknessIn":{"type":"number","description":"Slab thickness in inches (4 for a patio)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"bags":{"type":["null","object"],"properties":{"40lb":{"type":["null","number"]},"60lb":{"type":["null","number"]},"80lb":{"type":["null","number"]}}},"netFt3":{"type":["null","number"]},"netYd3":{"type":["null","number"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"wastePct":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"withWasteM3":{"type":["null","number"]},"withWasteFt3":{"type":["null","number"]},"withWasteYd3":{"type":["null","number"]},"approxWeightLb":{"type":["null","number"]},"readyMixOrderYd3":{"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_OD-7ty7mQQelPgm1Kukv5","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 cubic yards of concrete needed for a slab, including waste allowance, ready-mix order size, and bag counts for 40/60/80 lb bags.","exampleAgentPrompt":"How much concrete do I need for a 20 by 30 foot patio that's 4 inches thick? Include a 10% waste allowance and tell me how many 60lb and 80lb bags I'd need, plus the ready-mix order size in cubic yards.","exampleUseCases":[{"title":"Backyard patio concrete estimate","prompt":"I'm pouring a 16 by 24 foot backyard patio, 4 inches thick. How many cubic yards of concrete do I need to order, and how many 80lb bags would I need if I go the DIY route? Use the standard 10% waste factor."},{"title":"Garage floor pour planning","prompt":"Can you figure out how much concrete I need for a 24 by 24 foot garage floor at 6 inches thick with a 12% waste allowance? Give me the ready-mix order size and the bag counts for 40, 60, and 80 lb bags."},{"title":"Sidewalk or walkway material estimate","prompt":"I'm building a 3-foot-wide, 50-foot-long concrete walkway that's 4 inches thick. How many cubic yards should I order from the ready-mix truck, and how many 60lb bags would it take if I do it by hand?"}],"resultDescription":"Returns net volume in cubic feet and cubic yards, volume with waste in cubic yards, cubic feet, and cubic meters, the rounded-up ready-mix order size in cubic yards, counts of 40lb/60lb/80lb concrete bags needed, approximate weight in pounds, the waste percentage applied, a plain-English summary, and optional disclaimer text.","failureModes":["Missing required parameters (lengthFt, widthFt, or thicknessIn) returns an error","Non-positive or zero dimensions produce invalid results","Extremely large slab dimensions may produce unrealistic bag counts","wastePct outside reasonable range may be ignored or clamped","Payment failure or 402 not handled returns no result"],"whenToPreferThis":"Choose this endpoint when you need a fast, accurate concrete volume estimate for a rectangular slab, including ready-mix order sizing and bag counts with waste factored in. Ideal for DIY homeowners, contractors, or agents building construction planning workflows where concrete material quantities must be computed programmatically without manual formula work.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:14:27.282Z","isFirstParty":false,"canonicalSlug":"concrete-slab-volume-calculator-621df995"}