Free calibration log template for Excel
A calibration register with the fields auditors actually look for: control and serial numbers, as-found and as-left results, intervals, and next-due dates that compute themselves. Overdue status cells turn red on their own.
.xlsx · Works in Excel, Apple Numbers, Google Sheets and LibreOffice · No signup, no watermark.
Status colors and due dates recalculate automatically. These example rows ship in the file.
What’s inside
Instrument register
One row per instrument: control number, serial number, type, manufacturer, location and status. Next due is computed from the interval, and the due-status cell flags itself overdue or due soon. Nothing to configure.
Calibration log
One row per calibration: who calibrated, as-found and as-left condition, certificate reference. A failed calibration automatically raises an “Action required” flag, so out-of-tolerance events don’t slip past quietly.
Intervals by type
Source-backed typical calibration intervals for 69 instrument types, from calipers to pressure gauges, with the realistic range and what drives it. A defensible starting point, not a guess.
Dropdowns built in
Status, instrument type and pass/fail results are validated dropdowns, the same values auditors expect under ISO 9001 clause 7.1.5. The register stays consistent even with many hands in the file.
The one thing this template can’t do is remind you.
The due-date math is in the file. The alert is not. If nobody opens the spreadsheet, an overdue caliper stays overdue until an auditor finds it for you. Gaugelog is built to close exactly that gap: upload this sheet as-is, your columns are recognized automatically, and reminders fire on their own before anything goes overdue.
Upload it to Gaugelog →Free up to 30 instruments. No credit card, no demo call.
Common questions
What should a calibration log contain?
At minimum: a unique ID per instrument (control number and serial number), its type and location, the calibration interval, the date of each calibration, the as-found and as-left condition, who calibrated it, and the next due date. This template covers all of it, plus a reference to the calibration certificate.
How is the next due date calculated?
Next due = last calibration date + interval, using real calendar months (the EDATE function). The register also shows days until due and turns the due-status cell red when it is overdue, amber when it is due within 30 days.
Does it work in Apple Numbers, Google Sheets and LibreOffice?
Yes. The file is a standard .xlsx and uses cell-local conditional highlighting so the formulas, dropdowns and status colors survive the import across those apps.
Is it really free?
Yes, and no email is required. It is a genuinely useful standalone template. Gaugelog turns the same register into a live shared system with unattended reminders, linked records and certificates, change history and audit exports.
Want the reminders to fire automatically?
You already downloaded the template, it’s yours. Upload that exact file to Gaugelog and get due-date reminders without opening a spreadsheet again.
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