Calculators
Calibration decision tools
Practical calculators for the calibration and supplier quality decisions that actually matter, with the standards built in. The kind of thing usually buried in a paid spreadsheet or a consultant's binder. No signup, and your numbers never leave your browser.
Calibration and measurement
Decision rules, intervals, uncertainty, and measurement system analysis, using the standard methods your assessor already expects.
ISO/IEC 17025 · decision rules
Guard Band & Decision Rule Calculator
Compute your test uncertainty ratio (TUR), set guard-banded acceptance limits, and generate a decision-rule statement for your certificates. Built around ISO/IEC 17025 clause 7.1.3 and ILAC-G8.
Open the toolCalibration intervals
Calibration Interval Calculator
Get a defensible interval two ways: a risk-based starting point from instrument type and usage when you have no history, or a reliability-target method from your as-found in-tolerance data.
Open the toolMeasurement uncertainty
Thermocouple & RTD Uncertainty Calculator
Build a temperature calibration uncertainty budget the GUM way: combine the reference, readout, repeatability, bath, and reference-junction contributors into the combined and expanded uncertainty at k = 2.
Open the toolMeasurement decision risk
Conformance Probability & False-Acceptance Risk
Turn a measured value and its uncertainty into a conformance probability and the specific risk of a false accept or false reject, the JCGM 106 way. The rigorous decision-risk number a guard band only approximates.
Open the toolMeasurement systems (MSA)
Gage R&R Calculator
Run a measurement system analysis from your operator and part data: repeatability, reproducibility, %GRR and number of distinct categories, with a traffic-light verdict on whether the gage is good enough.
Open the toolCalibration intervals
Drift Rate & Interval Calculator
Work out how fast an instrument is drifting and how long until it risks going out of tolerance, then get a recommended calibration interval with margin to spare.
Open the toolMeasurement uncertainty
Resolution Uncertainty Calculator
Convert an instrument resolution (and optional repeatability) into a standard and expanded uncertainty the GUM way. A quick companion to the full uncertainty budget.
Open the toolMeasurement uncertainty
Measurement Uncertainty Budget Calculator
Build a full GUM uncertainty budget: add each contributor with its distribution and sensitivity, combine them by root-sum-square, and expand to U at your coverage factor, with a per-contributor variance breakdown and a ready-to-paste ISO/IEC 17025 statement.
Open the toolProcess capability
Process Capability Calculator
Turn spec limits and your process mean and spread into Cp, Cpk, Pp, Ppk, the sigma level, and estimated ppm out of spec, with a capable, marginal, or not-capable verdict. Includes where measurement error and Gage R&R still matter.
Open the toolMeasurement systems (MSA)
Bias & Linearity Calculator
Check whether a gage reads true across its range: enter your reference standards and repeated readings for the bias at each level, the AIAG linearity slope and percent linearity, and a plain verdict. The accuracy half of MSA, alongside Gage R&R.
Open the toolMeasurement systems (MSA)
Attribute Gage R&R Calculator
Run an AIAG attribute agreement study: within- and between-appraiser agreement, each appraiser's effectiveness, miss and false-alarm rates against the reference, and a kappa verdict. The pass/fail counterpart to a variable Gage R&R.
Open the toolISO/IEC 17025 · decision rules
TUR & TAR Calculator
Compute your test uncertainty ratio and test accuracy ratio, check them against the 4:1 rule, and see when a guard band is needed. Explains why TUR, built on your full measurement uncertainty, is the modern ISO/IEC 17025 way over the older TAR.
Open the toolMeasurement uncertainty
Type A Uncertainty Calculator
Turn a set of repeated readings into a GUM Type A uncertainty: mean, standard deviation, the standard uncertainty of the mean, degrees of freedom, and expanded uncertainty. Feeds straight into the full uncertainty budget.
Open the toolMeasurement uncertainty
Welch-Satterthwaite Calculator
Combine uncertainty components with their degrees of freedom to get the effective degrees of freedom and the right coverage factor k from the Student t distribution, then the expanded uncertainty. The rigorous k the budget tool leaves to you.
Open the toolAudit readiness
Calibration Audit Readiness Self-Assessment
A guided self-assessment of your calibration program across inventory, traceability, records integrity, intervals, and out-of-tolerance handling. Get a 0 to 100 readiness score and a prioritized list of gaps to close before your next audit.
Open the toolRecords and registers
Calibration Log Template
Build a calibration register with an asset tag, last cal date, interval, result, technician, and certificate number on every row. It computes the next-due date and flags every instrument that is overdue or due within 30 days, then exports to CSV.
Open the toolSupplier quality
Keep your approved supplier list and supplier ratings defensible, with certificate expiry flagged before it costs you an audit finding.
Supplier quality
Approved Supplier List Builder
Build an approved supplier list that holds up to ISO 9001 clause 8.4, with approval scope and status on every row and automatic flagging of certificates that have expired or are about to.
Open the toolSupplier quality
Supplier Scorecard Calculator
Rate a supplier on quality, delivery, and the other criteria you care about, then get a weighted score with a letter grade you can put straight into a supplier review.
Open the toolNew to decision rules and intervals? Read the guide:
Decision rules, guard banding, TUR & calibration intervals under ISO/IEC 17025 →A calculator solves one case. Axiospec runs your whole program.
The same decisions, automated across every instrument you own: due dates, traceability, and audit-ready records in one place. See it on real calibration data.
Free plan, no credit card · Unlimited users · Nothing to install