I Have 25 Kg of Pillar Wax — How Many 150 g Mould Candles Can I Realistically Produce After Accounting for Spills and Trimming Waste?

From 166 to the real number, step by step

When you start from a fixed quantity of wax, the calculation runs in reverse. Instead of adding allowances to a candle count, you subtract losses from a wax quantity. The order matters in the same way. Spills come off the wax first. Trimming makes each pour heavier than the candle you sell. Test pours are whole candles. Failed releases are a share of the pours that remain. We start with unscented candles, where the finished weight is all wax.

Trimming is the biggest single loss here, bigger than spills. That surprises people, because 5 g sounds trivial next to a 150 g candle. But it is taken from every pour, and every thirty pours lose a whole candle's worth to the trimming bin. If your trimmings are clean, remelt them. That recovers most of this step, and I Need 1,000 Fragranced Mould Candles — How Do I Calculate Wax and Fragrance When Each Candle Loses a Small Amount During Trimming and Finishing? shows how to credit remelted trim. The failed releases are small for a plain shape at 2%. A bubble or flower mould fails more often, and I Need 500 Bubble Candles for Wedding Favours — How Much Pillar Wax Should I Purchase After Accounting for Failed Unmoulding and Broken Candles? works through a 4% rate.

Scented candles: why the count goes up

It seems backwards, but adding fragrance means more candles from the same wax. The load is a share of the finished weight. At 8%, a 150 g candle is 12 g of oil and 138 g of wax, so each candle takes 12 g less wax than an unscented one. The oil fills that weight, and you buy it separately. Run the same steps with 142.60 g of wax per pour (155 g × 0.92):

The oil is calculated on every pour, trim and spill included, because the whole batch is scented: 170 pours × 155 g × 8% × 1.03 = 2,171.24 g. The 8% is a labelled test load. CSI publishes no fragrance ceiling for Soy Pillar Wax, so check the product page or ask on WhatsApp. Freestanding candles show seeping oil on the surface, so test before a full run. If you have been working from the idea that "oil is extra on top of the wax", this is the correction: with a fixed wax quantity, the oil adds candles. It does not dilute them. I Need to Produce 2,000 × 150 g Candles — How Do I Calculate the Total Wax Requirement Without Accidentally Treating Finished Candle Weight as Pure Wax Weight? covers the same mistake for jar candles.

Lean, working and cautious

The four losses are assumptions until you have logged a run. Here is the same 25 kg under three sets of assumptions, from a tidy workshop with a plain pillar mould to a first run on a detailed shape:

Lean and cautious sit about seven or eight candles either side of the working figure. That is the honest uncertainty in "how many will 25 kg make" until you have run this mould in this workshop. Quote from the working row, and if the client is exacting, from the cautious row. After one run, weigh what went in and count what came out, then replace all three rows with your own figures.

Promising a number, and topping up to hit one

Two practical decisions follow. First, what to promise. With 149 realistic unscented candles, promising 145 leaves a small margin for a bad afternoon, and any extras become samples or stock. Second, if the client needs a specific number, work forward instead: candles ÷ (1 − failure), plus tests, × weight per pour × (1 + spills). Then buy the difference from the 25 kg in the smallest bags that cover it.

Hitting 150 candles exactly needs a small top-up, because 149 sits just below it. For 175 or 200 the top-up is a real purchase. At a flat ₹0.60 a gram, topping up costs exactly the grams you need, rounded to the nearest 500 g bag. There is no saving in rounding up to another 10 kg bag unless you will use it. I Have 25 Kg of Soy Wax — How Many 150 g Candles Can I Produce at 8% Fragrance Load After Allowing for Production Loss? runs the same yield maths for 25 kg of container soy in jars, and I Have 50 Kg of Candle Wax — How Many 200 g Finished Candles Can I Realistically Produce When Fragrance and 5% Wastage Are Included? for 50 kg with 5% wastage.

The priced order

The wick line assumes 12 cm of braided wick per pour, a labelled working length. One 61 m roll covers about 500 pours. Wick size for a 150 g pillar is not published, so burn-test one of the three test pours. Moulds, packaging, labour and freight are not included.

For the forward version, going from a candle count to a wax order, see I Need 1,000 Decorative Mould Candles with No Fragrance — How Much Pillar Wax Should I Buy if Each Finished Candle Weighs 120 g? (unscented) and I Need 1,000 Fragranced Mould Candles — How Do I Calculate Wax and Fragrance When Each Candle Loses a Small Amount During Trimming and Finishing? (scented with trimming). If the 25 kg has to cover several designs, I'm Producing Several Different Mould Candle Designs — How Do I Calculate the Combined Wax Requirement When Every Mould Has a Different Fill Weight? splits it design by design. If part of your production is jar candles in a different wax, I Want to Buy Enough Wax for Both Jar Candles and Mould Candles — How Should I Calculate Quantities Separately When the Two Products Use Different Waxes? keeps the two calculations apart.

Before you promise a client a quantity from wax already in stock, read I Have 100 Kg of Wax for a Commercial Production Run — How Do I Calculate the Maximum Number of Finished Candles Before Promising Quantities to a Client?. It sets out the same round-down discipline for a 100 kg commercial run.

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