Candle making calculators that show their working
Wax weight, fragrance load, batch scaling, cost and pricing. Free, no sign up, in grams or ounces and any currency. Every result comes with the arithmetic behind it, so you can check it rather than trust it.
Candle Wax Calculator
How much wax a vessel needs, using real wax density and your own fill level rather than a one-size-fits-all factor.
Fragrance Load Calculator
Fragrance oil for any batch, with the percent-of-wax versus percent-of-total distinction handled properly.
Candle Batch Calculator
Scale a recipe to any batch size and get the full shopping list in one go.
Candle Cost Calculator
What a candle actually costs you to make, including the labour and overheads most makers forget.
Candle Pricing Calculator
The price that leaves you the profit you asked for after platform fees. Margin and markup kept separate.
Candle Burn Time Calculator
Rough burn hours from wax weight, given as a range because wick and vessel dominate.
How much wax for common jar sizes
Soy wax at 0.9 g/ml, poured to 90% full, with fragrance at 8% of wax weight. For any other wax, vessel or fill level, use the wax calculator.
| Vessel | Capacity | Wax needed | Fragrance at 8% |
|---|---|---|---|
| Votive | 60 ml / 2 fl oz | 49 g / 1.7 oz | 4 g |
| Small tin | 120 ml / 4 fl oz | 97 g / 3.4 oz | 8 g |
| Medium tin | 180 ml / 6 fl oz | 146 g / 5.1 oz | 12 g |
| Standard jar | 240 ml / 8 fl oz | 194 g / 6.9 oz | 16 g |
| Large jar | 300 ml / 10 fl oz | 243 g / 8.6 oz | 19 g |
| Extra large jar | 360 ml / 12 fl oz | 292 g / 10.3 oz | 23 g |
| Three wick | 480 ml / 16 fl oz | 389 g / 13.7 oz | 31 g |
Note that an 8 fl oz jar takes about 6.9 oz of wax, not 8 oz. Jars are sold by volume and wax is sold by weight, and wax is lighter than water — so the two numbers never match.
Why another set of candle calculators
Because most of the ones out there hand you a number and expect you to take it on faith. Every calculator here shows the arithmetic underneath, so if a figure looks wrong you can find out why in about ten seconds.
They also try to get the awkward details right rather than round them away. Wax density and fill level are kept as separate inputs instead of being collapsed into one magic factor that only works for soy. Fragrance load asks whether your percentage is measured against the wax or the finished weight, because suppliers mean both and the difference is enough to make a batch sweat. Pricing keeps margin and markup firmly apart, and solves for the price rather than bolting fees on afterwards.
Nothing here needs an account and nothing is stored on a server — your unit and currency preference lives in your own browser and that is the extent of it.
Frequently asked questions
Are these calculators free?+
Yes, all of them, with no sign up and no limit on how often you use them.
Do they work in ounces as well as grams?+
Yes. There is a unit switch on every calculator, and the setting is remembered. Currency is selectable too, so the costing and pricing tools work wherever you sell.
Which calculator should I start with?+
The wax calculator if you are working out a new vessel, the batch calculator if you know your recipe and need a shopping list, and the cost calculator if you are trying to work out whether your prices make sense.
How accurate are the results?+
The arithmetic is exact and every calculator shows its working so you can check it. The reference data — wax densities and fragrance capacities — is typical industry figures, and your supplier's spec sheet always takes precedence.