I Make Several Candle Sizes Using the Same Fragrance — How Do I Create a Cost-Per-Unit Calculation for 100 g, 200 g and 300 g Candles Without Rebuilding Everything Manually?

The one rate, and why it is the whole method

The reason recosting three sizes feels like three jobs is that most sheets are built around the candle. Build the sheet around the mixture instead and the work collapses. Your wax and your oil are always combined in the same ratio — that is what a fragrance load is — so they have one blended rate, and that rate does not care how big the jar is.

Fix the convention first, because it decides everything after it. Fragrance load is a percentage of wax weight, which is how CSI product pages state loads. So “100 g, 200 g and 300 g” on this page means grams of wax: at 8% they carry 8 g, 16 g and 24 g of oil, and 108 g, 216 g and 324 g go into the three jars. Write that sentence at the top of your own sheet and never change it mid-sheet — a range costed half in wax weight and half in finished weight is a range with three different real loads in it.

Now the arithmetic. Eco Soy CSI 400 in the 5 kg pack is ₹399.20 a kilogram, so one gram of wax is ₹0.40. At 8%, that gram is accompanied by 0.08 g of Japanese Cherry Blossom, and at ₹4.84 a gram in the 1 kg pack that share is ₹0.39. The loaded-wax rate is the sum: ₹0.79 per gram of wax at 8%. Divide by 1.08 and you have the same mixture expressed per gram of what is in the jar: ₹0.73. Two numbers. Everything else on this page is one of them times a weight.

Three sizes from one rate

Here is the table the whole page exists for. The scented-wax column is the rate times the wax weight; the oil is never entered by hand, because it is already inside the rate. The vessel and wick columns are per-piece prices and are the only figures that need a decision per size.

Read the last two rows carefully, because they are where costing a range goes wrong. Cost per gram is ₹1.08, ₹1.08 and ₹1.16 — the largest candle is the dearest per gram, which is the opposite of what scale usually does. That is not a wax effect. It is entirely the vessel and wick decision: the 300 g row here carries a ₹129.80 jar against a ₹31.86 one, a difference of ₹97.94, plus ₹3.54 more wick. If you pick a dearer container for your large size — and most makers do — then your large size is not automatically your efficient one.

The check that keeps all three sizes at a true 8%

There is one arithmetic slip that costs more than every rounding decision on this page put together, and it hides inside the convenience of a range. You cost the 200 g candle first, note that it takes 16 g of oil, and then reuse 16 g on the other two sizes because that is the bottle you have and the figure you remember. The cost sheet still adds up. The candles do not: 16 g on 100 g of wax is a 16.00% load and on 300 g of wax it is 5.33%. One range, three loads, one of them far above where you meant to be.

The fix is structural rather than careful: never store the oil weight. Store the load. In a sheet the oil column should read wax grams × load and nothing else, so that 8% produces 8 g, 16 g and 24 g on its own and keeps producing the right figures when you change the load or add a fourth size. A typed constant is the only part of a costing that cannot correct itself.

The vessel line, and the measurement nobody wants to do

This is the honest limit of costing a size range from a catalogue. Most CSI containers publish a price and a photograph, not a wax fill weight — and none of the three vessels priced on this page publishes one. So the pairing above is by price, not by capacity, and nothing here says a 108 g, 216 g or 324 g pour fits any particular jar. A handful of containers do carry a figure in their own title, such as the Apothecary Glass Candle Jar with Dome Lid at ₹212.40 in its 500 gm size and the Borosilicate Glass Jar at ₹200.00, and those are worth knowing about when you are choosing. For everything else, the measurement is yours.

It takes two minutes per jar and you never repeat it. Fill the empty container with water to the line you would pour wax to, tip the water into a vessel on a scale, and write down the grams. Multiply by about 0.9 to convert water weight to soy wax weight — that is general candle-making practice rather than a CSI figure — and you have the wax weight that jar really takes. Multiply by 1.08 and you have the scented-wax weight at 8%. Write both on the SKU line beside the jar’s price and your range never needs guessing again.

Keeping it current when a price moves

Two practical notes on the packs behind this rate. On Eco Soy CSI 400 the 5 kg pack is ₹399.20 a kilogram against ₹399.00 in the 1 kg pack — the larger pack is ₹0.20 a kilogram dearer, not cheaper, so buy the 5 kg for the convenience of one delivery rather than for a rate. On Japanese Cherry Blossom the 1 kg pack at ₹4.84 a gram genuinely is the lowest rate on its ladder, ₹0.16 a gram under the 100 gm and 500 gm packs, which is ₹2.53 on a 200 g candle. Most ladders on this store are flat from 50 g upward, so check the oil you actually use rather than assuming either way.

It is also worth knowing how far one pack goes across a range. A 1 kg pack of Japanese Cherry Blossom at 8% scents about 125 of your 100 g candles, 62.5 of the 200 g or 41.7 of the 300 g. If your range sells in roughly equal numbers, a kilogram covers a mixed run of about 21 sets of one of each. That is the figure to plan a reorder against, and it is the one place where running three sizes on one fragrance genuinely simplifies your buying.

Finally, the part this page will not do for you. Every figure above is materials. Your printed label, outer box, insert, ribbon, outbound courier, payment gateway fee, packing time and electricity are real costs and none of them is a CSI product, so none of them gets a number here. Add them as named rows with your own figures, total the sheet as materials plus your own costs, and keep the two halves visible. A range priced off the materials half alone will look healthiest on exactly the size that carries the most packaging.

Frequently asked questions