The Candle Science Numbers
Candle marketing loves the word "premium" and almost never explains the physics underneath it. This page is our normalized reference dataset: the melt point of every common wax, how wax type and wick material change the way a candle actually burns, the burn-pool rule that prevents tunneling for good, and the fragrance-load percentage that decides how strong a candle smells. Built by people who love candles enough to want the real numbers, not just the marketing copy.
The one thing to know: The single most important candle-care fact: on the FIRST light, let the candle burn until the melt pool reaches the full diameter of the jar — roughly one hour of burn time per inch of container diameter. Skipping this locks in wax 'memory' at whatever the first melt pool's edge was, and every future burn will tunnel straight down inside that ring no matter how long you burn it after that.
Wax melt points
| Wax type | Melt point | Notes |
|---|---|---|
| Soy wax | ~120°F (49°C) | Soybean-oil-based; slightly varies by blend/hydrogenation |
| Paraffin wax | ~130–150°F (54–66°C) | Refined petroleum wax; range depends on refining grade and additives |
| Beeswax | ~145–147°F (63–64°C) | Highest melt point of the common waxes |
| Coconut wax blend | ~124°F (51°C) | Usually blended with soy/paraffin; pure coconut wax alone is very soft |
Melt point is the temperature at which the solid wax turns liquid — it's the single biggest driver of how a candle feels, pools, and burns.
Burn-rate class and scent-throw class, by wax
| Wax type | Burn-rate class | Scent-throw class |
|---|---|---|
| Soy wax | Slower / cooler burn | Moderate cold throw, moderate hot throw |
| Paraffin wax | Faster / hotter burn | Strong hot throw |
| Beeswax | Slowest burn | Weak throw (mostly unscented use) |
| Coconut wax blend | Slow / clean burn | Strong cold throw |
Wick material: cotton vs wood
| Wick material | Burn behavior |
|---|---|
| Cotton | Steady flame; modern braided cotton wicks are designed to curl and self-trim into the flame's edge as they burn. |
| Wood | Audible crackle/pop — trapped moisture and resin in the wood grain rapidly release gas as the wick chars, producing the sound. Needs a shorter, straighter trim than cotton (about 1/8 inch). |
Hot throw vs cold throw, defined
Cold throw is how strongly a candle smells unlit, straight from the jar or freshly opened — driven by how much fragrance oil has migrated to the wax surface. Hot throw is how strongly it smells while burning, driven by the fragrance oil vaporizing out of the heated melt pool. A candle can have strong cold throw and weak hot throw (or vice versa) because they depend on different physical processes — one is surface evaporation at room temperature, the other is vaporization from a heated liquid pool.
The burn-pool rule (tunneling prevention)
The single most important candle-care fact: on the FIRST light, let the candle burn until the melt pool reaches the full diameter of the jar — roughly one hour of burn time per inch of container diameter. Skipping this locks in wax 'memory' at whatever the first melt pool's edge was, and every future burn will tunnel straight down inside that ring no matter how long you burn it after that.
Burn-time math: hours per ounce, by wax lean
| Wax lean | Approx. hours per ounce of wax |
|---|---|
| Paraffin-leaning blend | ~5–7 hours per ounce of wax |
| Soy-leaning blend | ~6–8 hours per ounce of wax |
Rough estimates — actual hours vary with wick size, jar shape/width, draft, and how consistently the burn-pool rule is followed.
Fragrance load
Fragrance load is the percentage of a candle's total wax weight that is fragrance oil, and it's the main lever behind how strong a candle smells. Most commercial candles run roughly 6–10% fragrance load; below that, hot throw tends to be faint, and pushing much higher risks the wax not fully binding the oil, which can cause sweating (oil beading on the surface) or an unstable, sooty flame.
The soot truth: wick trimming
Trim the wick to about 1/4 inch before every single light, not just occasionally. An untrimmed, overly long wick produces a larger flame that burns hotter and less efficiently, throwing off more soot (visible as black residue on the jar or a mushroom-shaped carbon cap on the wick tip). The 1/4-inch guideline is the industry-standard fix for both soot and mushrooming.
Caveats — read before citing a number
- These are typical ranges, not a lab certificate for any specific product. Individual manufacturer blends vary; always check a specific product's own burn-time claim on its label.
- Burn-time-per-ounce figures are rough estimates derived from general candle-industry technical guidance, not a controlled burn test we ran ourselves.
- Fragrance load percentage is rarely published per-product — the 6–10% figure is an industry-typical range, not a guarantee for any specific candle you buy.
- Wax "memory" (tunneling) is largely permanent once it happens — this dataset reports prevention, not a guaranteed cure for an already-tunneled candle (see our tunneling-fix page for partial workarounds).
Methodology & versioning
Version 1.0 — published July 30, 2026. Facts are drawn from candle-industry technical references (wax chemistry and combustion behavior consistent with National Candle Association public consumer-education material) and cross-checked against our existing wax/wick guides. We do not run our own combustion lab; this is a reference dataset built from established candle-science facts, not proprietary lab testing. Corrections: if a figure is found to be wrong or industry guidance changes, this page and the CSV below are updated in place and the version/date bumped — see How We Evaluate for our full editorial policy.
Machine-readable download: the full table is available as CSV at /candle-numbers.csv, and a condensed digest is maintained in /llms-full.txt.
Suggested citation: The Wax Lab Editorial Team. (2026). The Candle Science Numbers (Version 1.0) [Data set]. The Wax Lab. https://wax-lab.pages.dev/candle-numbers/
Licensed under CC BY 4.0 — reuse with attribution.
This page is general candle-science reference information, not a lab certification for any specific product.
Frequently Asked Questions
A normalized reference dataset covering wax melt points, burn-rate and scent-throw classes by wax type, wick-material behavior, the burn-pool rule, burn-time-per-ounce math, fragrance load percentages, and the wick-trim guideline — the physical facts candle marketing usually skips.
Mostly because of melt point. Soy wax melts around 120°F while paraffin ranges roughly 130–150°F depending on the blend. The lower-melting soy wax tends to burn cooler and slower, while paraffin's higher melt point supports a hotter burn and stronger hot throw for many blends.
On a candle's first light, let it burn until the melted wax pool reaches the full width of the container — roughly one hour per inch of diameter. Wax has a form of 'memory': whatever the edge of that first melt pool was becomes the boundary the wick tunnels straight down through on every future burn if you stop the first light too early.
Most commercial candles use a fragrance load of roughly 6–10% of the total wax weight. Below that range hot throw tends to be weak; pushed much higher, the wax may not fully bind the oil, risking sweating (oil beading on the surface) or an unstable, sooty flame.
An untrimmed wick grows a larger flame that burns hotter and less efficiently, producing more soot and a mushroom-shaped carbon cap at the tip. The industry-standard fix is a 1/4-inch trim before every single light, not just an occasional trim.