The maker's workbench for soap, candles and resin
Weigh it once, get it right. Use the lye calculator with saved recipes, the SAP chart that shows where every number comes from, wax and fragrance loads, resin ratios, batch costs and a batch log with cure dates.
- NaOH
Soap lye calculator
Lye, water and fragrance for cold or hot process soap, with saved recipes.
- SAP
Saponification value chart
NaOH & KOH SAP values for 33 oils, with ranges and sources.
- FO%
Candle wax and fragrance load calculator
Wax and fragrance oil for a batch of container candles.
- A:B
Resin volume calculator
Resin and hardener for any mold, by volume or weight.
- €/$
Batch cost calculator
Cost per bar or candle from pack prices, plus a price with markup.
- LOG
Batch and label log
Batch codes, cure-until dates and label ingredient lists.
- +1
Knitting and crochet row counter
Tap-to-count rows with repeats and multiple projects.
Numbers with sources
Saponification values come from Codex Alimentarius and pharmacopoeia ranges. The range is shown, not just one number from somewhere.
Your recipes stay yours
Saved recipes, batch records and counters stay in your browser. There are no accounts and nothing is uploaded.
Safety first
The lye calculator can use the low end of each SAP range and shows the worst-case superfat, so a lye-heavy batch doesn't take you by surprise.