A worked example
100 mm wet, 95 mm dry and 88 mm fired gives 5% drying and 12% total shrinkage.
Test bar
Measure shrinkage from your own wet, dry and fired reference marks.
YOUR LITTLE WORKBENCH
ON YOUR DEVICE ✦Test bar
Loading your local workspace…
THE METHOD / 01
A clear wayfrom start to finish.
Total shrinkage = (wet − fired) / wet × 100. Firing-only shrinkage uses dry length as its denominator.
Keep the assumptions clear
Use the same marked span at each stage. Expansion is reported as a negative shrinkage value.
A FEW USEFUL ANSWERS
Good to know.
Are my inputs uploaded?
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Can I keep my result?
Use the download controls for the current tool or print from your browser. Your valid edits autosave in this browser. Export a JSON backup to move devices; see the privacy page.
Do I need an account?
No sign-up, paid API or subscription is required. Both languages use the same tools. English always opens at the root address.
CLAYKIND / TOOLKIT
A little help for every step.
01
Shrinkage planner
Calculate wet dimensions for a target fired size, or predict the fired size.
Open tool03
Slab material
Estimate a rectangular slab’s volume and mass from dimensions and your clay density.
Open tool04
Studio notes
Keep clay, test shrinkage and firing notes, then export a local notebook.
Open tool