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Work out the batch before you pour it.
Fragrance load, lye and superfat, citric ratios, accord percentages, cost per unit — the maths behind handmade, done properly.
What are you making?
5 CRAFTS · 27 CALCULATORSCandles The numbers behind a clean pour: how much wax a vessel takes, a safe fragrance load, the right wick, and what each candle costs to make. 6 TOOLS → Soap Every figure a soaper needs before the stick blender comes out — lye and superfat, water discount, recipe resizing, bar yield and cost per bar. 9 TOOLS → Bath bombs Get the fizz right the first time: the ratio and why it is 1:2, how much mix your mould takes, which additives do anything, and what a bomb costs to make. 3 TOOLS → Perfume Everything before the first bottle: what to buy, how strong to make it, how to balance a blend so it lasts past lunchtime, and why it smells of alcohol for the first two days. 7 TOOLS → Resin How much epoxy a project actually needs, split into resin and hardener in millilitres and grams — with your resin’s own pour depth ceiling checked, because exceeding it is a heat hazard rather than a slow cure. 2 TOOLS →
Start with these
All calculators → CANDLES Wax weight Wax for any vessel, by fill line and candle count. SOAP Lye & superfat NaOH or KOH for any oil blend, with superfat. BATH BOMBS Recipe builder Ratio, additives, butters, scent and cost per bomb. PERFUME Dilution and blending Oil to alcohol at any strength, with the note split checked.
Printables
Print it out and fill it in by hand.
Some things are easier on paper. Batch logs to record what you poured, pricing sheets to work out what to charge, label planners to get the wording right. Download once, print whenever.
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Every calculator states its formula and its assumptions underneath. Check our maths against yours.
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Every figure on the site is computed from the same reference data, so a guide can never contradict the tool it links to.