All calculators
Every calculator on the site, for all five crafts. Nothing you type into one is saved or sent anywhere.
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Candles
Wax calculator
How much wax your containers actually take, by volume or by water weight, for any wax and any number of candles.
Open →Fragrance oil calculator
Fragrance oil for any load, quoted either way — percentage of wax or percentage of the finished candle — with your wax’s maximum shown.
Open →Candle pricing calculator
Every material plus your time, worked into a cost per candle, a wholesale price, a retail price and the margin each leaves you.
Open →Burn time calculator
Estimated burn hours from wax weight and container diameter, plus how many evenings that actually is.
Open →Soy vs paraffin vs beeswax
Every wax compared in the container you actually use — wax weight, fragrance load, finished weight, burn time and cost per candle.
Open →Wick size chart
The wick size to test first, across the ECO, CD, LX and HTP series, by container diameter, wax and fragrance load.
Open →Soap
Lye calculator
Sodium or potassium hydroxide for any blend of oils, with your superfat and water discount worked in and every oil weighed out.
Open →Superfat calculator
Pick a superfat and see the lye it takes — or enter a recipe’s stated lye weight and find out what superfat it is really running at.
Open →Water discount calculator
Lye concentration, water-to-lye ratio and water as a percentage of oils, converted between each other so a recipe stops being ambiguous.
Open →Hot process calculator
Lye and water sized for a cook that runs wetter, the stages to watch for, and the superfat and fragrance weights to stir in at the end.
Open →Soap recipe resizer
Take a recipe written for someone else’s mould and restate every oil, the lye and the water at the size you actually want to make.
Open →Soap mold calculator
How many bars a mould makes once they have cured — or how much oil to buy for the bars you need, with the cure loss accounted for.
Open →Essential oil & fragrance calculator
Fragrance or essential oil for a batch, quoted the way soap quotes it — against the oils — and checked against your own supplier’s category 9 maximum.
Open →Melt and pour calculator
Base weight for your mould, the fragrance it will actually hold, and the temperatures to work at — for soap that arrives already saponified.
Open →Soap pricing calculator
Every oil at its own price, plus lye, fragrance, packaging and your time, costed against the bars a batch actually yields after its cure.
Open →Bath bombs
Bath bomb recipe builder
Citric to bicarb for any batch, with the additives, butters and scent worked in against their ceilings — and what each bomb costs you to make.
Open →Shower steamer recipe builder
A steamer sized to your mould, at the essential oil load the steam actually needs — and with butters and oils refused outright, because they end up on a wet floor.
Open →Bath bomb recipe scaler
Take a recipe written for someone else’s mould and restate every ingredient at the batch size, mould or bomb count you actually want.
Open →Perfume
Perfume dilution and blending
How much fragrance oil and how much alcohol a bottle takes at any strength, with the top-heart-base split checked as you build it — and the weight and volume figures side by side, because recipes disagree about which they meant.
Open →Perfume formula scaler
Take a formula written in drops, parts or millilitres and restate every material in grams at the bottle size you actually want — and see how far a formula written in drops is from the split it claims.
Open →Working dilutions
Make up a stock solution of a material too strong to dose neat — from what you have, or back from the amount you want — with what a formula row is really delivering once it is diluted.
Open →Solid perfume recipes
A solid perfume sized to your tin, with the wax share that decides whether it is a balm or a brick — and the harder waxes corrected for, because swapping them weight for weight sets like a candle.
Open →Body mist recipes
A water-based mist sized to your bottle, with the solubiliser quoted against the fragrance it has to hold — and a preservative that the tool will not let you leave out, because water grows bacteria.
Open →Drops, millilitres and grams
Convert any perfume material between drops, millilitres, grams and ounces using its own specific gravity — the conversion recipes get wrong, because a millilitre of vanilla absolute and a millilitre of bergamot are not the same weight.
Open →Cost per bottle
What a bottle actually costs to make — every material at what you paid for it, plus the bottle, the packaging and your time, against the batch you are really making.
Open →Resin
Epoxy resin calculator
How much epoxy a table, river, coaster or tumbler actually takes, split into resin and hardener — with your resin’s own pour depth ceiling checked, because going over it is a heat hazard rather than a slow cure.
Open →Epoxy mix ratio calculator
Split any amount into resin and hardener from the ratio printed on your bottle — in millilitres and grams at once, with the gap between the two conventions shown, because 2:1 by volume is not 2:1 by weight.
Open →Works for every craft
Batch size calculator
Scale a recipe up or down for any craft — every line restated by ratio, with the one line that must not be scaled named for the craft you are making.
Open →Craft pricing calculator
What a handmade item costs and what it has to sell for — materials, packaging, your time, overhead and the platform’s cut, against the batch it actually came from.
Open →Fragrance calculator
Fragrance for a candle, a perfume or a bath bomb — three different denominators, kept apart, because a percentage that is safe in one is meaningless in the next.
Open →