How long does wax last in a warmer?

The important detail in that table is the last column. "About 60 hours" describes a typical result. "Up to 8 hours" describes a ceiling. Comparing them directly is comparing an average with a best case, and it flatters the ceiling.

Warmer temperature - the biggest factor

Fragrance release scales with pool temperature. A 24 W plate warmer conducting heat straight into the dish exhausts a cube substantially faster than a gentle bulb warmer radiating from above. Same wax, materially different lifespan.

This is a genuine trade rather than a defect: the hot warmer gives you a stronger throw for a shorter time. If duration is what you want, buy a bulb warmer. Warmer types.

Dose

Not linear. Doubling the wax does not double the hours, because a deeper pool sits cooler and releases more slowly - some of the extra wax is still throwing when you change it, which is waste rather than duration.

Room and airflow

Neither changes how fast fragrance leaves the wax, but both change how long it stays useful to you. A drafty room removes fragrance as fast as it is produced, so the wax is consumed at the same rate for less benefit.

How long you leave it running

Obvious and routinely ignored. Fragrance leaves whenever the wax is hot, whether or not you are in the room - and your nose stopped registering it after ten minutes anyway. A timer is the cheapest way to make a pack last longer. Warmers with a timer.

You can compute this properly for any brand that publishes hours, and it is more useful than any durability claim.

Cost per hour of fragrance = pack price / published hours. Multiply by the hours you actually run in an evening.

Worked example with the published figures: an 8 oz Happy Wax pouch is stated at about 240 hours. If it cost $24, that is $0.10 an hour, so a four-hour evening costs about 40 cents of wax. Add electricity - a 10 W warmer at 17 cents per kilowatt-hour is about 0.007 cents a minute, call it four-tenths of a cent for the evening - and the electricity is a rounding error against the wax.

Full method on cost per hour of fragrance.

The wax is not consumed. Only the fragrance is. So a spent melt is exactly the same volume of wax it always was, and it will keep melting and re-solidifying indefinitely, looking identical throughout.

That is the reason people run dead wax for days. There is no equivalent of a candle burning down.

Practical answer: treat it as a timer. If a maker publishes hours, use them. If not, assume 8 to 12 hours of running per standard cube and change it then. If you want to be exact, note the date you put a dose in - a warmer running four hours an evening gets through a cube in two or three days.