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Melt Point Calculator

Calculate wax blend melt point from component wax melting temperatures and ratios. Predict blend hardness for candles, balms, and cosmetic bases.

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Inputs that matter
Component 1 Percentage, Component 1 Melt Point, Component 2 Percentage, Component 2 Melt Point
Output to expect
Melt Point Calculator
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Weighted Average Melt Point

For simple blends, melt point approximates the weight-averaged melting temperature of components. Accurate for similar wax types; less so for eutectic interactions.

Blend MP (°F) = Σ (component MP × weight fraction)

Softening Point vs Melt Point

Waxes have a melt range, not a single point. Reported melt points are typically the capillary melt point or drop melt point from manufacturer data.

Range ≈ blend MP ± 3–5°F depending on component spread

Hardness Correlation

Higher melt point blends are harder at room temperature. Adding beeswax or stearic acid raises melt point; adding coconut oil or soft paraffin lowers it.

ΔMP ≈ Σ (fraction × ΔMP per component vs base wax)

Updated: July 2026

Example Scenarios

70% soy (MP 120°F) + 30% paraffin (MP 150°F): blend MP ≈ 0.7×120 + 0.3×150 = 129°F. Harder than pure soy, better scent throw, adjust wick accordingly.

80% beeswax (MP 145°F) + 20% coconut oil (MP 76°F): blend ≈ 131°F. Soft enough for lip balm tubes at room temperature with good structure.

907 g paraffin (145°F) + 45 g stearic (MP 150°F, 5%): slight increase to ~145.3°F but noticeable hardness gain for pillar candle durability.

Common Mistakes to Avoid

Using container wax melt point for pillar formulas

Container soy (~120°F MP) cannot support freestanding pillars. Blend with harder wax or additives to reach 140°F+ before molding pillars.

Assuming linear blend behavior for all wax combinations

Some wax pairs interact non-linearly. Always pour test samples and measure penetration hardness (dropping point) for production formulations.

FAQ

No. Waxes soften over a range. Manufacturer melt points are standardized test values. Blends may show gradual softening before full liquefaction.

Higher melt point waxes need more heat (larger wicks) to pool. Lower melt point waxes pool easily but may soften in hot storage. Match wick to blend melt point.

Linear weight averaging works well for paraffin-soy and similar blends within 20°F component spread. Large spreads or additives (vybar, polymers) deviate — test empirically.

Pillar blends typically 140–150°F (60–65°C) for heat resistance. Container waxes at 110–130°F are too soft for freestanding pillars.

FO lowers effective melt point slightly (1–3°F at 8–10% load) by acting as a plasticizer. High FO loads soften wax — factor into pillar and votive formulations.

About Melt Point Calculator

Blending waxes changes melt point, hardness, and burn characteristics. This calculator estimates the melt point of a wax blend from each component's melting temperature and weight ratio for candle and cosmetic formulation.