Free Knitting & Crochet Tools
GaugeScale is a free collection of calculators and guides for knitters and crocheters. No sign-up, no ads, no fluff — just clean tools that solve real problems. Adjust patterns to fit your gauge, check yarn compatibility, and convert measurements instantly.
The Tools
Each tool solves one specific problem. Click to open.
Gauge Converter & Pattern Scaler
Paste your entire pattern's stitch counts and convert them all at once to match your actual gauge. Includes stitch repeat rounding, border stitch handling, and saved gauge presets.
Yarn Substitution & Compatibility Checker
Find out whether a substitute yarn will actually work before you buy it — get a compatibility verdict based on weight and fiber content, plus exact yardage calculation.
Crochet Gauge Converter & Pattern Scaler
The same batch pattern scaling as the knitting tool, built specifically for crochet terminology — hook sizes, stitch abbreviations, and crochet-specific row gauge advice.
Pattern Size & Measurements Calculator
Scale a pattern's finished measurements from one size to another. Includes a construction type safety check that warns you when simple scaling won't work for your garment type.
The Guide
BEGINNER GUIDEHow to Measure Knitting & Crochet Gauge
The step-by-step guide to making a gauge swatch, measuring it correctly, and understanding what to do when your numbers don't match the pattern. Covers common mistakes, blocking, and how to adjust a raglan pattern. Includes an interactive gauge checker.
Read the guide →