I’m Spending Too Much on Candle Raw Materials but Don’t Know Where — How Do I Calculate Cost per Gram and Cost per Finished Candle for Every Ingredient?

Step 1: cost per gram or per unit, from the pack you buy

For anything weighed (wax, oil, dye if you weigh it), divide the pack price by the pack's grams. For anything counted (wicks, jars, lids, labels, boxes), divide by the units. For anything measured by length (tape, wick roll), divide by metres. Use two decimals for rupees and keep four for very cheap per-gram figures like wax, or the rounding swamps the answer. On CSI's live list:

Step 2: landed cost, freight and GST

Two things sit between a list price and your cost per gram. Delivery. CSI dispatches from Pune and does not publish delivery charges; the figure on your invoice is the one to use. GST. We do not state here whether a listed price includes GST; use what your invoice shows. If you are registered and can claim the input tax credit, that GST is recoverable and stays out of your cost per gram; if you cannot, it is a cost and goes in. Your accountant decides which applies to you; this is not tax advice.

Freight has to be shared across the items in an order. Take a worked-example restock: Woody Oud 1 kg, Chunks 10 kg, Eco C2 100, Black dye 50 ml, ₹11,946.20 of goods, with a ₹450.00 delivery charge on the invoice (worked example; use yours). There are two common ways to share it:

The totals are similar; the split is not. By value, the expensive oil carries most of the delivery charge; by weight, the heavy wax does, because ten of the eleven kilos in the box are wax. Couriers commonly bill on actual or volumetric weight, so allocating by weight usually tells you more about which ingredient is really expensive to bring in (a judgement; check your courier's terms). Either way, freight here is ₹8.18 a candle, 87% of the wick line, ₹29,448.00 a year at 300 candles a month: a line, not a rounding error. A full landed-cost comparison between wax suppliers is the landed wax cost post.

Step 3: grams and units per candle

Wax and oil: CSI quotes load as a percentage of total candle weight: grams of oil = candle weight × load, grams of wax = the rest. A 200 g candle at 8% is 16 g + 184 g. If you measure 8% "of the wax" instead, the same 200 g candle carries about 14.8 g of oil, so say which basis your sheet uses and stick to it; the conversion is in the optimum-dosage post. Woody Oud's page states "candles (6-10%)"; the Chunks page states "up to 13%". Your load comes from your own burn test, not from either page.

Dye: you dose in drops but buy in ml. Count how many drops of your dye fill 1 ml from your own dropper (20 in our worked example; droppers vary), then ml per candle = drops ÷ drops per ml: 6 drops = 0.30 ml = ₹2.83 from the 50 ml bottle. If you weigh dye instead, use grams and the bottle's grams. Wick: one per candle, or two for a double-wick jar; a pre-tabbed Eco C2 includes its tab. Jar and lid: one each, or one line if they are sold together. Label, box: one each. Tape: measure a sealed box (0.6 m in our example).

Step 4: the worksheet for one finished candle

Here is the whole candle, landed. Wax and oil carry freight by weight from the worked restock; wick and dye carry none (negligible weight); jar, lid and label are worked-example "own supplier" figures; box and tape are CSI list prices. Percentages are rounded to one place and sum to 100.0%.

At list prices, before freight, the same sheet totals ₹289.55; freight adds the difference. Notice what the sheet already tells you before any ranking: the two weighed lines (wax 39.6%, oil 24.6%) and the jar (21.5%) are where the rupees are; dye (1.0%) and tape (0.8%) are honest rows that will never be the answer. Ranking and the Pareto view are the ranking post; deciding which line to chase is the ₹50-per-unit gap table; the hub's order of attack is the cluster hub.

What pack size is worth, line by line

With the sheet built, the per-gram ladders answer a practical question: which pack should each line be priced at, and is moving up a size worth anything? Worked example: 300 candles a month.

At 300 candles a month you use 4,800 g of Woody Oud (₹21,749.76 of cash at the kilo price) and 55,200 g of wax, about 5.52 ten-kilo bags. The money in this table is in two places: getting off small oil bottles, and not paying for two deliveries where one would do. Neither needs a burn test, so there is no test cost to recover: each pays back on the first order, and the only price is cash on the shelf (a month of Woody Oud is the same ₹21,749.76 whether it sits in 100 g bottles or a kilo).

When a cheaper per-gram figure means a test

A worksheet will tempt you to swap a line for something cheaper per gram. Sort the temptation first. Same product, different pack (Woody Oud 50 g → 100 g, dye 15 ml → 50 ml): a purchasing change; smell or colour-check the new lot against a retained sample and move on. Different product (another wax, another oud, another dye, chips instead of liquid) or different amount (a lower load, fewer drops): a formulation change, tested one variable at a time on several candles burned to the end. The method lives in the change-control series: testing cheaper alternatives without risking a bestseller, liquid dye to dye chips, and for a cheaper wax the cheaper-wax revalidation post. Comparing two oils on what each costs at the load it needs is cost per finished candle, not per kilo.

The products in the worksheet

Five CSI items priced in the sheet, chosen on page statements, ladder shape and stock on 4 October 2026. CSI publishes no throw or burn data, so nothing here is ranked on performance. Candle counts use 184 g of wax, 16 g of oil, 0.30 ml of dye and 0.6 m of tape.

Skip for this decision: Woody Oud above 100 g "for the discount" (there is none per gram), the 10 kg Chunks "for the discount" (it costs more than ten 1 kg bags), the box 100-pack (same per box), and the out-of-stock Black Candle Dye Liquid listing.

Frequently asked questions