Candle Burn Time Estimator
Estimate how long your candle will burn based on wax weight, container diameter, wick size, and wax type. Enter your candle specs and get an accurate burn time estimate, recommended test sessions, and a label recommendation — all calculated privately in your browser.
How Candle Burn Time is Calculated
Candle burn time is determined by dividing the total wax weight by the burn rate — how many ounces of wax the candle consumes per hour. The burn rate itself depends on three key variables: container diameter, wick size, and wax type. A wider container requires a larger melt pool and generates more heat, increasing the burn rate. A larger wick draws more fuel and burns hotter, also increasing the burn rate. Wax type affects how efficiently the fuel is consumed.
The formula used in this estimator is: burn time (hours) = wax weight in oz / burn rate (oz/hr). Container diameter establishes the base burn rate — ranging from 0.35 oz/hr for small 2–2.5 inch containers up to 0.80 oz/hr for containers over 4 inches. The wick size modifier adjusts this by -10% for small wicks or +15% for large wicks. Finally, a wax type multiplier is applied: soy wax ×0.9 (burns slower), beeswax ×0.85 (burns slowest), coconut wax ×0.92, and paraffin ×1.0 as the baseline.
This estimator also calculates the recommended number of test burn sessions. Professional candle makers typically conduct 3 to 5 test burns of approximately 4 hours each to verify the actual burn time under real conditions, since fragrance load, room temperature, and air movement all introduce variability not captured in the formula.
Burn Time by Wax Type
Beeswax candles burn the longest per ounce of wax, making them the most economical choice for maximum burn hours. A beeswax candle with the same wax weight as a paraffin candle will typically last 15–18% longer. Beeswax also produces a natural honey scent without fragrance additives and emits negative ions said to purify air, though the burn time advantage is the primary practical benefit.
Soy wax is the second-longest burning wax type and the most popular choice for artisan candle makers. It burns approximately 10% slower than paraffin, produces minimal soot, and holds fragrance well. Coconut wax falls between soy and paraffin at roughly an 8% slower burn rate. Paraffin wax is the fastest-burning of the four types but typically costs less per pound, which can offset the shorter burn time from a value perspective.
Mixed or blended waxes (such as soy-paraffin blends) will fall somewhere between these rates depending on the blend ratio. If you are using a blend, choose the wax type that makes up the larger proportion of your mix. For a 70% soy / 30% paraffin blend, select soy wax in this estimator and expect results to be slightly conservative (actual burn time may be a few percent shorter).
Safety Guidelines for Candle Burning
The National Candle Association and fire safety organisations universally recommend burning candles for no more than 4 hours at a time. Exceeding this limit causes the wax pool to overheat, leading to accelerated evaporation of fragrance, mushrooming of the wick, excess soot, and elevated container temperatures that can crack glass jars. Always allow a candle to cool completely — at least 2 hours — before re-lighting.
Wick trimming is the single most impactful safety and performance habit for candle users. Trim the wick to 6mm (1/4 inch) before every burn. A wick that is too long produces a larger flame, consumes wax faster than the formula predicts, generates soot, and increases the risk of the flame touching the container wall. Always keep the melt pool free of wick trimmings, debris, and matches.
Never leave a burning candle unattended, and keep candles away from children, pets, curtains, and other flammable materials. Place candles on a heat-resistant surface and maintain at least 10 cm (4 inches) of space between candles when burning multiple at once. Extinguish candles before leaving a room and always before going to sleep.