{"uid":"cap_mGVUTD_0s0rfCBCyIOuYX","slug":"rc-filter-calculator-05a3a551","name":"RC Filter Calculator","description":"RC filter cutoff frequency, time constant and charge times to 63%, 90% and 99% from resistance and capacitance.","url":"https://electronics-calc.x402tookit.com/rc-filter?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":["resistance","capacitance"],"properties":{"resistance":{"type":"string","description":"Ohms, e.g. 10k"},"capacitance":{"type":"string","description":"Farads, e.g. 100n, 2u2 or 0.000001"}}}},"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"]},"cutoffHz":{"type":["null","number"]},"degraded":{"type":["boolean","null"]},"formatted":{"type":["null","object"],"properties":{"tau":{"type":["null","string"]},"cutoff":{"type":["null","string"]}}},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"capacitanceF":{"type":["null","number"]},"chargeTimesS":{"type":["null","object"],"properties":{"p90":{"type":["null","number"]},"p95":{"type":["null","number"]},"p99":{"type":["null","number"]},"p632":{"type":["null","number"]},"p999":{"type":["null","number"]}}},"resistanceOhm":{"type":["null","number"]},"timeConstantS":{"type":["null","number"]},"angularCutoffRadS":{"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_ipOEjN314MF9O6fBjAN6_","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":"Computes RC filter cutoff frequency, time constant, and capacitor charge times (63%, 90%, 95%, 99%, 99.9%) from resistance and capacitance values.","exampleAgentPrompt":"What's the cutoff frequency and time constant for an RC filter with a 10k ohm resistor and a 100nF capacitor, and how long will it take to charge to 63%, 90%, and 99%?","exampleUseCases":[{"title":"Low-pass filter design for audio circuit","prompt":"I'm designing an audio low-pass filter with a 4.7k resistor and a 10nF capacitor — what's the cutoff frequency and time constant?"},{"title":"Capacitor charge time for timing circuit","prompt":"I need to know how long it takes my capacitor to reach 90% and 99% charge with a 22k resistor and 47 microfarad capacitor for a timing circuit."},{"title":"RC debounce circuit parameter check","prompt":"For a debounce circuit using a 1k resistor and 2.2 microfarad cap, what's the time constant and cutoff frequency?"}],"resultDescription":"Returns the cutoff frequency in Hz, angular cutoff frequency in rad/s, the RC time constant (tau) in seconds, capacitor charge times at 63.2%, 90%, 95%, 99%, and 99.9%, the parsed resistance in ohms, parsed capacitance in farads, and human-readable formatted strings for tau and cutoff frequency.","failureModes":["Missing required resistance or capacitance query parameters returns an error","Invalid or unparseable component value strings (e.g. unsupported unit prefixes) cause a parse failure","Zero or negative values for resistance or capacitance may result in undefined/null outputs","Payment failure (x402 protocol) results in 402 response before calculation is attempted"],"whenToPreferThis":"Use this endpoint when you need precise RC filter or timing calculations without writing code — especially when resistance or capacitance are given in human-friendly notation like '10k', '100n', or '2u2'. It handles unit parsing automatically and returns multiple charge-time milestones in a single call, making it ideal for electronics design assistance, automated circuit analysis, or educational tools.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T18:49:30.772Z","isFirstParty":false,"canonicalSlug":"rc-filter-calculator-05a3a551"}