Metrologist Plan · MetTutor v2.0
The complete toolkit for the
serious metrologist.
Advanced standards access, AI-powered document validation, uncertainty spreadsheet analysis, and the deepest CCT exam preparation available — purpose-built for senior metrologists and exam candidates at $49 a month.
14-day free trial · No credit card required
Metrologist Plan
$49/mo
or $39.20/mo billed annually
14-day free trial
No credit card required
What Metrologist adds
Advanced capabilities for advanced work
Metrologist builds on the complete Cal Tech feature set — adding the advanced standards, document intelligence, and compliance tools that senior metrologists and CCT candidates require.
Metrologist+
Uncertainty Spreadsheet Upload + AI
Upload an Excel or CSV uncertainty budget directly into MetTutor. The AI parses your contributors, evaluates each component against GUM requirements, runs the full combined uncertainty calculation, and explains every step — with export in any format.
GUM-compliant · .xlsx · .csv
Metrologist+
Document Validators & Compliance Checkers
AI-powered tools that review your calibration procedures and lab documents against recognized standards — checking for required elements, flagging gaps, and citing the specific clause or section that applies. Twelve rules covering ISO 17025 and calibration procedure requirements.
Cal Procedure Validator · ISO 17025 Checker
Metrologist+
NCSLI Recommended Practices (RP-1–12)
Full access to NCSLI Recommended Practices covering measurement assurance (RP-1), calibration interval analysis (RP-1), laboratory design, uncertainty analysis, and ten additional RP documents — the definitive practical guidance for metrology laboratory operations.
RP-1 through RP-12
Metrologist+
A2LA R101 / R205 Guidance
Access A2LA accreditation requirement documents — R101 (general requirements for accreditation) and R205 (specific requirements for calibration laboratories). Essential reference for labs pursuing or maintaining A2LA accreditation under ISO 17025.
A2LA · Accreditation
Metrologist+
MSA / GR&R (AIAG MSA 4th ed.)
Measurement System Analysis and Gauge Repeatability & Reproducibility content aligned to the AIAG MSA Reference Manual (4th edition). Covers Gage R&R study design, ANOVA method, %Study Variation, %Contribution, and acceptability criteria for measurement systems.
AIAG MSA 4th ed. · Gage R&R
Metrologist+
JCGM 106 Decision Rules
Guidance on JCGM 106 — Evaluation of measurement data: the role of measurement uncertainty in conformity assessment. Covers decision rules, guard bands, binary statements of conformity, and the relationship between measurement uncertainty and pass/fail decisions.
JCGM 106 · Conformity assessment
Uncertainty Budget · AI Analysis
GUM-Compliant
uncertainty_budget_dmm.xlsx
Parsed · 6 contributors identified
| Contributor | Value | Dist. | u(xi) |
|---|---|---|---|
| Resolution | 0.005 V | Rect. | 0.00289 |
| Reference std. | 0.012 V | Normal | 0.00600 |
| Repeatability | 0.008 V | Normal | 0.00800 |
| Temperature | 0.003 V | Rect. | 0.00173 |
| Drift | 0.010 V | Rect. | 0.00577 |
MetTutor AI · GUM Analysis
Combined standard uncertainty uc = 0.01110 V. Expanded uncertainty U = 0.02221 V at coverage factor k = 2 (≈95.45% confidence). Dominant contributor: Repeatability (52% of variance). Resolution component correctly evaluated using rectangular distribution with divisor √3.
Calibration Procedure Validator
12 rules · checks required procedure elements against ISO 17025 §7.8 and Z540.3
ISO 17025 Full Checker
10 rules · reviews lab documents for ISO 17025:2017 compliance gaps with clause citations
Document Intelligence
AI that reads your documents — and knows what’s missing.
The Metrologist plan introduces MetTutor’s document skill layer — AI tools that go beyond answering questions to actively reviewing and analyzing your lab documents.
The uncertainty spreadsheet upload accepts any Excel or CSV file with uncertainty budget data. MetTutor parses each contributor, identifies the distribution type, applies the correct divisor, and walks through the full GUM-compliant combined uncertainty calculation with step-by-step explanation. Results export in Word, Excel, PDF, CSV, or TXT.
The Calibration Procedure Validator and ISO 17025 Full Checker apply a structured rule set to your pasted document content, flagging missing elements and citing the specific standard clause that requires them. The checkers are grounded in MetLibrary documents — not general AI inference.
With 22 rules across two validators, this is the most standards-rigorous document review toolset available in any metrology learning platform.
Advanced Standards Coverage
The standards that define professional metrology practice.
Metrologist adds six advanced standards sets — the authoritative references that senior metrologists and accredited calibration laboratories depend on.
NCSLI
NCSLI Recommended Practices RP-1–12
National Conference of Standards Laboratories International
All twelve NCSLI Recommended Practices — the foundational operational guidance for metrology laboratories covering measurement assurance programs, calibration interval analysis, laboratory design, uncertainty analysis, and more.
RP-1 Measurement assurance
RP-1 Cal interval analysis
RP-6 through RP-12
A2LA
A2LA R101 & R205
American Association for Laboratory Accreditation
A2LA R101 (General Requirements for Accreditation) and R205 (Specific Requirements for Calibration Laboratories). Essential references for labs pursuing ISO 17025 accreditation through A2LA or preparing for A2LA assessments.
R101 General requirements
R205 Calibration labs
Accreditation prep
MSA
MSA / GR&R · AIAG MSA 4th Edition
Measurement System Analysis Reference Manual
Gauge Repeatability and Reproducibility study design and analysis per AIAG MSA (4th ed.). Covers crossed and nested Gage R&R, ANOVA method, Average & Range method, %Study Variation, %Contribution, Number of Distinct Categories (ndc), and acceptability criteria.
Crossed Gage R&R
ANOVA method
%Study Variation
ndc criteria
JCGM 106
JCGM 106 Decision Rules
Evaluation of measurement data: role of measurement uncertainty in conformity assessment
JCGM 106 guidance on making binary conformity decisions in the presence of measurement uncertainty. Covers decision rules (guard bands, acceptance intervals), simple acceptance, stringent acceptance, and the risk of incorrect conformity decisions.
Decision rules
Guard bands
Acceptance intervals
False accept/reject risk
GUM
JCGM 100:2008 & NIST GUM / TN 1297
Guide to the Expression of Uncertainty in Measurement
Complete GUM calculation support: Type A and Type B evaluation, uncertainty budgets, combined standard uncertainty, coverage factors, expanded uncertainty, and Welch-Satterthwaite effective degrees of freedom — plus AI analysis of uploaded spreadsheets.
Type A / Type B
Spreadsheet upload
Welch-Satterthwaite
Coverage factor k
ILAC
ILAC P10 / P14 / P15
ILAC policies on measurement uncertainty in calibration and testing
Guidance on ILAC requirements for stating measurement uncertainty in calibration certificates (P10), using and interpreting uncertainty statements (P14), and expressing uncertainty in testing (P15). Applicable to all ILAC-member accredited laboratories.
P10 Calibration CMC
P14 Uncertainty statement
P15 Testing
Certificate compliance
Everything Included
Complete Metrologist feature list
Metrologist includes every Explorer, Student, and Cal Tech feature — plus the advanced capabilities listed below.
Core & Learning
✓All 4 tutor modes
✓Unlimited AI messages
✓MetLibrary citations (950+ documents)
✓Metrology Skills Matrix
✓Concept of the Day (VIM vocabulary)
✓Unlimited daily quiz questions
✓Streak tracking & badges
✓Export: Word · Excel · PDF · CSV · TXT
Measurement Science (All Tiers)
✓Metrology fundamentals & history
✓NIST SI units & NIST SP 811 conversions
✓Full VIM vocabulary (JCGM 200:2012)
✓Full GUM (JCGM 100) calculations
✓Uncertainty budget calculator
✓TUR calculator (ANSI/NCSL Z540.3)
✓ISO/IEC 17025:2017 clauses & guidance
✓ILAC P10 / P14 / P15 compliance guidance
CCT Exam Preparation (Cal Tech+)
✓CCT Exam Prep mode (BoK-aligned)
✓110-question timed CCT mock exam
✓CCT readiness score & pass probability
✓Spaced repetition (SM-2 algorithm)
✓CCT study calendar
Metrologist Exclusives
✓NCSLI Recommended Practices (RP-1–12) MET
✓A2LA R101 / R205 guidance MET
✓MSA / GR&R (AIAG MSA 4th ed.) MET
✓JCGM 106 decision rules MET
✓Uncertainty spreadsheet upload + AI analysis MET
✓Calibration Procedure Validator (12 rules) MET
✓ISO 17025 Full Checker (10 rules) MET
Voice & Accessibility
✓Microphone input (voice questions)
✓Read-aloud per message
✓Auto-read new responses
Billing
✓14-day free trial — no credit card required
✓Annual billing available (20% discount — $39.20/mo)
✓Cancel or change plan anytime
Managing a calibration team?
Metrologist is the individual professional’s complete toolkit. The Lab Manager plan ($199/mo) adds 15 team seats, a manager dashboard, team usage reporting, and seat expansion packs for labs deploying MetTutor across a full calibration team.
- ✓15 team seats included (Cal Tech-level access per seat)
- ✓Manager dashboard & team usage reporting
- ✓Invite & manage calibration technicians
- ✓Seat expansion packs (+5, +10, +25 seats)
- ✓All Metrologist features included
Metrologist FAQ
Common questions
You upload an Excel (.xlsx) or CSV file containing your uncertainty budget contributors directly into the MetTutor chat. Required columns include Contributor, Value, Unit, and Distribution — a Divisor column is optional (MetTutor infers the correct divisor from the distribution type if omitted). MetTutor parses the file, evaluates each component against GUM requirements, calculates combined standard uncertainty (uc), determines coverage factor k, and outputs expanded uncertainty U with a step-by-step explanation of every calculation. Results can be exported to Word, Excel, PDF, CSV, or TXT.
The Calibration Procedure Validator applies 12 rules derived from ISO 17025:2017 §7.8 and ANSI/NCSL Z540.3 requirements — checking that a calibration procedure includes required elements such as scope, applicable standards references, environmental conditions, traceability statement, uncertainty statement, and acceptance criteria. The ISO 17025 Full Checker applies 10 rules across the management and technical requirements of the standard, flagging gaps and citing the specific clause number that applies. You paste your document content into the chat and the validator runs automatically.
Yes — Metrologist provides the most comprehensive CCT preparation available. In addition to all Cal Tech exam features (110-question mock exam, readiness score, pass probability, SM-2 spaced repetition, and CCT study calendar), Metrologist adds the advanced standards that appear on the CCT exam: NCSLI Recommended Practices, A2LA guidance, MSA/GR&R, and JCGM 106 decision rules. These are explicitly tested in CCT knowledge domains. If the CCT exam is your goal, Metrologist is the most thorough path to it.
Cal Tech ($29/mo) covers the core calibration professional toolkit — GUM calculations, ISO 17025 guidance, TUR analysis, ILAC compliance, and the full CCT exam preparation suite. Metrologist ($49/mo) adds six capabilities exclusive to this tier: NCSLI Recommended Practices (RP-1–12), A2LA R101/R205 guidance, MSA/GR&R (AIAG MSA 4th ed.), JCGM 106 decision rules, uncertainty spreadsheet upload with AI analysis, and document validators and compliance checkers. If your work or exam prep requires any of these, Metrologist is the appropriate plan.
No. Metrologist is an individual plan — it does not include team seat management, a manager dashboard, or team usage reporting. These features are available in the Lab Manager plan ($199/mo, 14-day free trial), which includes 15 team seats with Cal Tech-level access and seat expansion packs for larger labs.
Yes. You can upgrade from any plan to Metrologist at any time from your Account page. The upgrade takes effect immediately and you are charged a prorated amount for the remainder of your current billing period. Annual billing is available at $39.20/month (billed as $470.40/year), saving $117.60 compared to monthly billing.
