For whoever is asked what the overdue gauge measured

Paste your calibration register. See every instrument that is overdue, and what it measured.

Overdue Calibration Finder reads your calibration register line by line for overdue, untraceable and out-of-tolerance instruments against ISO 9001 clause 7.1.5, ISO/IEC 17025, ISO 13485, IATF 16949 and AS9100. Paste your calibration register, one line per instrument. Every instrument comes back with its due date worked out: overdue, due before your audit, no interval or no traceable calibration recorded, and out of tolerance at the last calibration with no impact assessment on the product it measured, each with the ISO 9001, IATF 16949, AS9100, ISO 13485 or ISO/IEC 17025 clause behind it.

Check your own registerEight instruments free, no account. A published dictionary of 58 instrument classes and the clause text load with the page; every date is worked out in your browser.

What comes back: overdue and due before your audit, no traceable calibration, out of tolerance with no impact assessment recorded, each with the clause behind it.

Paste your register: asset ID, type, last calibration, interval. Nothing else is needed, and nothing leaves your browser until you save. No customer names, drawings or part numbers: the "used on" column takes a process or a product family.

Every date is shown with its arithmetic: last calibration plus interval gives the due date, against the date you set. Spot-check five instruments against your own register.

No email before the result and no score.

It never says an instrument is calibrated, accurate, fit for use or compliant, and never decides whether product was acceptable. A finding is a question for the quality manager.

Specimen, 4 of 40 labelsan invented machining company

overdue 198 days

MIC-0207

Micrometer

due 14/03/2026

14/03/2025 + 12 months

5 overdue in use

overdue 26 days

HG-0310

Height gauge

due 02/09/2026

02/09/2025 + 12 months

5 overdue in use

in date

TW-0520

Torque wrench

due 04/02/2027

04/08/2026 + 6 months

4 no impact assessment

due before audit

CMM-01

Coordinate measuring machine

due 05/11/2026

05/11/2025 + 12 months

6 lab not accredited

40 instruments, 4 overdue (2 used to accept product), 1 out of tolerance as found with no impact assessment recorded.

12 of 12 findings raised, 39 of 40 classes matched, 15 instruments on the recall sheet.

A laboratory technician in a hairnet, mask and gloves weighing a sample on an analytical balance — Walk into the surveillance audit already holding the answer to the auditor's first sampling question: which gauges ran past their dates, which lots they touched, and the clause for each. It works from the register spreadsheet you keep today, in your browser, with no calibration system to buy or install first.

Paste the register as it leaves the spreadsheet

One instrument per row: asset ID | type | last calibration | interval at least, or a header row with any of description, location, owner, due date, cal by, lab accredited, certificate number, traceable, as found, adjusted, used for acceptance, used on, status, procedure and impact assessment. Each instrument is matched to one of 58 published classes; one that fits none is read for its dates all the same.

Read the recall sheet and the arithmetic

Every due date is the last calibration plus the interval, calendar months added as months, printed beside the result. The recall sheet lays out what is overdue, what falls due before the audit date you set, and the next 90 days. A date that could be read day first or month first is shown both ways until you set the format.

Take the questions to the quality manager

Twelve findings in a fixed order, from overdue to a duplicate asset ID, each with the instruments it names, the clause from ISO 9001, IATF 16949, AS9100D, ISO 13485, ISO/IEC 17025, 21 CFR 211 or 21 CFR 58, and the question an auditor asks. The worksheet sets out the period in question for each out-of-tolerance or overdue acceptance gauge.

One instrument per row: Asset ID | Type | Last calibration | Interval, or a header row with any of Description, Location, Owner, Due date, Cal by, 17025 accredited, Cert no, Traceable, As found, Used for acceptance, Status, Procedure, Impact assessment. Tabs, pipes, commas or double spaces. A first line such as standards: IATF 16949, ISO 9001 | audit date: 2026-11-09 | date format: day first | as at: 2026-09-28 sets the rest.

Nothing is sent anywhere until you choose to save.

Standards that apply, and your dates (the first line of a paste sets them too) ISO 9001 IATF 16949 AS9100 ISO 13485 ISO/IEC 17025 (a lab) 21 CFR 211 (a drug maker) 21 CFR 58 (a GLP lab)Audit date Warning window daysDate format

Where every line on this page comes fromNothing here is written while you wait. We hold the text of ISO 9001:2015, quality management systems, IATF 16949:2016, automotive production quality management, AS9100D, aerospace quality management, ISO 13485:2016, medical device quality management, ISO/IEC 17025:2017, testing and calibration laboratories, 21 CFR Part 211, current good manufacturing practice for finished pharmaceuticals and 21 CFR Part 58, good laboratory practice for nonclinical laboratory studies, read clause by clause and checked against the copy we hold; every obligation Overdue Calibration Finder attaches is that text, cited to its clause. Where we do not hold a regime in full, the page names the obligation and says the text is not quoted. Overdue Calibration Finder does arithmetic on your own rows and quotes the obligation; it never rules on you. How this is built. Open the standards themselves.

Why a register, and not a calibration system

A calibration management system tracks instruments well once every one of them is in it. The quality manager at a 400-person shop is asked a simpler question first, by the certification body auditor, a customer or the board: across every gauge we hold, which are past due, which were used to accept product while past due or out of tolerance, and what did we decide about the parts they measured. The answer sits in the register you already keep. That is what this reads, in your browser, from the register as it stands.

The dictionary is ours and published in full: every instrument class and the clauses behind it, what each standard asks of a calibration register, the twelve findings, what the standards say about calibration intervals, what an auditor asks about overdue calibration and the calibration register template. It reads the register only; a finding is a question for the quality manager, never a ruling on an instrument or a product.