Free Engineering Tools

Quality and manufacturing tools built for engineers. No signup, no ads, no limits. Use them right in your browser.

Cpk / Ppk Calculator

Calculate process capability indices from your measurements. Paste data, set spec limits, get Cp, Cpk, Pp, Ppk, sigma level, and PPM instantly.

SPC · Capability

Sample Size Calculator

Determine the sample size for t-tests, proportions, and ANOVA. Set effect size, alpha, and power to get required n with a power curve.

DOE · Hypothesis Testing

OEE Calculator

Calculate Overall Equipment Effectiveness from production data. Availability, Performance, Quality breakdown with world-class benchmarks.

TPM · Manufacturing

Sigma Level / DPMO Converter

Convert between DPMO, sigma level, yield percentage, and Cpk equivalent. Includes 1.5σ shift option and full reference table.

Six Sigma · Quality

Takt Time Calculator

Calculate takt time from demand and available time. Add station cycle times to visualize line balance and identify bottlenecks.

Lean · Production Planning

Kanban Card Generator

Generate print-ready kanban reorder cards with barcodes, QR codes, and color-coded headers. CR80, half-letter, and 4x6 index sizes. Download PNG or tiled PDF.

Lean · Inventory · Kanban

Control Chart Generator

Generate Shewhart I-MR and X-bar R control charts. Upload CSV/XLSX or paste data. Nelson rules, Cp/Cpk capability, and PNG export.

SPC · Control Charts

Gage R&R Calculator

Perform crossed Gage R&R studies with ANOVA variance decomposition. Get %GRR, NDC, assessment, ANOVA table, and variance components.

MSA · Measurement Systems

Pareto Chart Generator

Create Pareto charts with cumulative percentage line and 80/20 analysis. Enter categories and counts, identify the vital few. Download as PNG.

Quality · Root Cause

Bayesian Cpk Calculator

Get P(Cpk > 1.33) and credible intervals instead of a point estimate. Posterior distribution of process capability from your data. No 1.5σ shift assumption.

Bayesian · SPC · Capability

FMEA RPN Calculator

Calculate Risk Priority Number from Severity, Occurrence, and Detection ratings. AIAG-VDA Action Priority classification with color-coded risk levels.

FMEA · Risk Assessment

First Pass Yield & RTY Calculator

Calculate First Pass Yield per process step and Rolled Throughput Yield. Find hidden factory waste, DPMO, and sigma level with visual yield breakdown.

Yield · Six Sigma · Quality

ISO 9001 Audit Checklist

Generate clause-specific audit checklists with evidence-based questions for ISO 9001:2015. Select clauses, get printable checklists with checkboxes and notes.

ISO 9001 · Audit · QMS

ISO Document Creator

Create structured ISO documents — Quality Manuals, Procedures, Work Instructions, Policies, and Forms. Pre-built templates with section editors. Save and print as PDF.

ISO 9001 · QMS · Documents

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