How Much Fragrance Oil Should I Use in Wax Melts?

The gram table

Fragrance load is always a share of the finished weight — oil plus wax — not a share of the wax alone. That convention matters: 10% of a 10 g melt is 1.0 g of oil and 9.0 g of wax, not 1.0 g of oil added to 10 g of wax (which would be 9.1%). Use it consistently and your figures match the wax maker's ceiling exactly. The table gives the grams for a single illustrative 10 g melt, a 60 g pack of six, and a 1 kg batch, at every load from 6% to the 13% ceiling on Chunks.

Two rows need a note. At 12% and 13%, only Chunks is allowed: CSI 464's stated maximum is 10%, so those rows are off-limits in that wax. And 13% is a ceiling, not a target. It is the most the wax maker says the wax can hold; it is not a promise that 13% will smell stronger than 10% in your warmer. Best Fragrance Load for Strong Wax Melts covers how to choose the load that actually performs, and why more oil is not always more scent.

Why the wax sets the limit

Every wax can hold only so much oil before the oil starts to separate. That limit is a property of the wax, which is why it changes from wax to wax and not from product to product. A melt and a candle poured in the same wax share the same ceiling. What is published for CSI's waxes is short:

CSI does not list a wax sold specifically as melt wax. Chunks and CSI 464 are sold for container candles, and they are the only two with a published ceiling, so they are the only two where this page can give you a maximum. If you want to use another wax, ask CSI for the wax maker's stated maximum first. Until you have it, stay in a cautious test range — general practice uses 6–10% as a test range in an unfamiliar wax, starting at the low end — and treat that as a starting point for tests, not a specification. Never exceed 13% in any wax.

Cost per melt and per pack

Load changes cost because oil costs far more per gram than wax. At ₹0.60 a gram, Chunks cost less than a fifth of the cheapest oil in this guide. Every point of load swaps a tenth of a gram of cheap wax for a tenth of a gram of expensive oil. Here is what that does to one 10 g melt for three oils from three price tiers, each at its 100 g rate:

The per-melt gap between 8% and 13% is ₹1.41 for British Rose and ₹3.20 for Raat Ki Rani. Small per melt; not small per thousand. For Raat Ki Rani, 13% instead of 8% adds ₹3,200.50 to every thousand melts. That is why the load should be the one that performs in your warmer, not the highest one allowed.

The Wax Melts Container (₹29.50 each at every pack size) adds 59.6% on top of the oil and wax in a British Rose pack at 8% — packaging, not load, is often the bigger lever on a pack's cost. CSI does not publish its fill weight, so the 60 g pack here is an assumption — if your container holds 48 g or 72 g, weigh one filled and rescale. Labour, labels, freight and GST are not included in any figure on this page.

If your melt is not 10 g

CSI does not publish the cavity weight of any of its moulds, and melt sizes vary widely: a coffee bean from the 55 Cavity Coffee Bean Mould is a fraction of a tablet from the 40 Cavity Square, and a bar from the 9 Bar Chocolate Mould is larger again. The formula does not change: oil = melt weight × load. The table covers five illustrative sizes; weigh your own cavity and pick the nearest row, or multiply directly.

Small melts expose a practical problem: 0.3 g of oil for a 5 g melt at 6% is too small to weigh reliably one melt at a time on most kitchen scales. That is not a reason to guess. It is a reason to mix by the batch — weigh oil and wax for a whole tray or a whole kilo, stir well, and pour. The load is then correct for every melt in the batch, however small.

Measuring it accurately

Everything above depends on two measurements you make yourself: the weight of your melt and the weight of your oil. Here is the method, start to finish.

Temperature matters too, but no oil-addition temperature is published in CSI's data for these waxes; follow the wax's product page and use a Pen Thermometer (₹354.00) so your process is repeatable. Colour follows the same logic as oil — CSI's liquid dyes (₹236.00 for 15 g) and dye chips (₹250.00) have no published dose, so follow the product page and record what you used.

Once your grams are settled, the next questions are which load performs best — Best Fragrance Load for Strong Wax Melts — and how to compare oils in a warmer — Which Fragrance Oils Give the Strongest Throw in Wax Melts?. If you are buying for volume, Buy 1 Kg Fragrance Oil for Commercial Wax Melt Making turns the per-melt grams into melts per kilo.

Frequently asked questions