{"uid":"cap_I6OqY17wAWRPjaxfGKtv5","slug":"craft-maker-calc-half-square-triangle-hst-cut-size-a5a6b4e5","name":"Craft & Maker Calc – Half-Square Triangle (HST) Cut Size","description":"Cut size of squares for half-square triangles (two-at-a-time or four-at-a-time) from the finished size, in eighths.","url":"https://craft-calc.x402tookit.com/hst-size?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":["finishedInches"],"properties":{"method":{"type":"string","description":"two (default; each pair of squares makes 2 HSTs) or four (each pair makes 4 HSTs)"},"unitsNeeded":{"type":"integer","description":"How many HSTs you need, to count the squares"},"finishedInches":{"type":"number","description":"Finished size of one HST in the quilt, in inches"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"method":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"squaresToCut":{"type":["null","number"]},"finishedInches":{"type":["null","number"]},"pairsOfSquares":{"type":["null","number"]},"cutSquareInches":{"type":["null","number"]},"hstPerPairOfSquares":{"type":["null","number"]},"unfinishedHstInches":{"type":["null","number"]},"cutSquareNearestEighth":{"type":["null","string"]},"seamAllowanceAddedInches":{"type":["null","number"]},"unfinishedHstNearestEighth":{"type":["null","string"]}}}}}}},"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_OlaISDwL4XXthgDgSXkSp","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 cut square size needed for half-square triangles (HST) using the two-at-a-time or four-at-a-time method, given the desired finished HST size in inches.","exampleAgentPrompt":"What size squares do I need to cut for half-square triangles that finish at 3.5 inches using the two-at-a-time method? I need 60 HSTs total.","exampleUseCases":[{"title":"Quilt block HST sizing for beginners","prompt":"I'm making a quilt and need half-square triangles that finish at 4 inches using the two-at-a-time method — what size do I cut my squares, and how many pairs do I need to cut if I need 32 HSTs?"},{"title":"Four-at-a-time HST production cutting","prompt":"I want to use the four-at-a-time method to make half-square triangles finishing at 2.5 inches. I need 100 of them — what size squares should I cut and how many pairs do I need?"},{"title":"Custom quilt design planning","prompt":"I'm designing a quilt with 6-inch finished half-square triangles using the two-at-a-time method. What's the cut square size to the nearest eighth of an inch?"}],"resultDescription":"Returns the cut square size in decimal inches and rounded to the nearest eighth of an inch, the unfinished HST size, the seam allowance added, the number of HSTs produced per pair of squares, and (if unitsNeeded is provided) the total number of pairs and squares to cut.","failureModes":["Missing required finishedInches parameter returns an error","Invalid or non-numeric finishedInches value causes a validation error","Unrecognized method value (anything other than 'two' or 'four') may fall back to default or error","Very small finishedInches values may produce impractical cut sizes","Payment failure (x402) if USDC balance is insufficient"],"whenToPreferThis":"Use this endpoint when a quilter or sewist needs to calculate fabric cut sizes for half-square triangles (HSTs) from a known finished size, supporting both the two-at-a-time and four-at-a-time cutting methods with results rounded to the nearest eighth of an inch — the standard unit for quilting measurements.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T00:34:28.520Z","isFirstParty":false,"canonicalSlug":"craft-maker-calc-half-square-triangle-hst-cut-size-a5a6b4e5"}