Free tool
Batch Recipe Calculator
Work out raw material weights for a soda-lime, borosilicate or lead crystal batch, with an estimated melting temperature and refining note.
Runs in your browser
Free tool
Annealing Schedule Calculator
Turn a glass type, a thickness and an oven load into a full ramp, soak and cool schedule with a timeline.
Runs in your browser
Free tool
COE Compatibility Calculator
Check whether two glasses can be fused or mixed safely by comparing their coefficients of expansion.
Runs in your browser
Reference values only
These calculators use published reference values for the three main glass families. Real materials vary between suppliers and between batches. Test every recipe, schedule and colour combination on your own setup before committing a finished piece.