One-time purchase
Pricing
$149
USD · one-time · instant download
- GUM-compliant uncertainty calculator workbook (.xlsx)
- Type A / Type B budgets, sample-size corrections, t-value tables
- Free updates to the workbook for 12 months
- 110% money-back guarantee if an auditor faults the calculation method
Comparable commercial calculators sell between $197 and $395.
What is in the file

Swipe sideways to read the full sheet →
Illustrative preview of the Budget sheet with example data. Final sheet layout may differ.
If your laboratory receives a non-conformance for measurement uncertainty on your next ISO 17025 audit while using this tool, we refund 110% of your money. You keep the file.