Measure Craft Formulations,
Perfect Pours Every Batch.
Free craft calculators: candle wax and fragrance per jar, quilt backing and binding yardage, knitting cast-on from gauge, resin volume for molds, and cross-stitch fabric sizing.
Candle Wax Density
Liquid wax shrinks ~14% upon cooling; multiply water volume by 0.86 for wax weight.
Fragrance Load Math
Calculate exact fragrance oil percentages by weight without curdling soy wax.
Epoxy Resin Volumes
A:B mixing ratios by weight vs volume for crystal clear bubble-free casting.
CraftCalc Tools
Candle Wax Calculator
Wax and fragrance oil per candle — by jar volume and fragrance load, in the ounces you actually weigh.
Quilt Backing & Binding Calculator
Backing yardage with seam planning and binding strips from your quilt's perimeter — the two finishing maths.
Knitting Gauge Calculator
Turn your gauge swatch into cast-on stitches and row counts — for any width, length, and stitch multiple.
Resin Volume Calculator
Resin for any mold — cubic inches to fluid ounces, split into Part A and Part B by your system's ratio.
Cross Stitch Size Calculator
Finished size of any chart on any fabric count — plus the cut size with border allowance.
Practical Guides & Best Practices
How Much Wax Per Candle? The Container Math, Done Right
Fluid ounces vs weighed ounces, the 0.86 rule, fragrance load ceilings, and why your "8 oz jar" does not hold 8 oz of wax.
Quilt Backing and Binding Math Without Tears
Panels, seams, perimeter strips — the two finishing calculations, explained with the geometry instead of memorized rules.
Reading a Knitting Gauge (and Why the Swatch Always Wins)
Stitches per inch, rows per inch, stitch multiples — how to translate a 4-inch square of knitting into a garment that fits.