Useful tools, ready when you are.

Math, Statistics & Probability

Primitive Root Modulo Prime Calculator

Find the least generator of a prime modulus nonzero residue group.

Image Tools

Print DPI Checker

Calculate effective DPI from pixels and intended print width.

Calculators

Print Resolution Calculator

Create a bounded, browser-local print resolution calculator with visible assumptions, review guidance, and downloadable output.

Calculators

Pro Rata Salary Calculator

Prorate full-time salary for reduced weekly hours and months employed.

Operations & Infrastructure

Process Audit Checklist

Create a bounded, browser-local process audit checklist with visible assumptions, review guidance, and downloadable output.

Productivity & Business Ops

Process Parameter Record Completeness Calculator

Measure production runs with complete required parameter records.

Quality Assurance

Process Validation Checklist

Create a bounded, reviewable process validation checklist with visible assumptions, downloadable output, and accountable human review.

Finance & Business

Procurement Savings Calculator

Create a bounded, browser-local procurement savings calculator with visible assumptions, review guidance, and downloadable output.

Product Attribute Mapper

Create a bounded, editable product attribute mapper from supplied merchant data with transparent rules and commerce safeguards.

Product Description Builder

Create a bounded, editable product description builder from supplied merchant data with transparent rules and commerce safeguards.

Product FAQ Builder

Create a bounded, editable product faq builder from supplied merchant data with transparent rules and commerce safeguards.

Product Image Ratio Checker

Create a bounded, editable product image ratio checker from supplied merchant data with transparent rules and commerce safeguards.