A community scale for perfume bottles

Heavy Scent

Weigh a new bottle or an empty one and share the number. The more people report the same bottle, the better everyone can tell how much juice is left in a used one before a sale or swap.

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Pick a bottle

Choose a bottle on the left, or use the calculator with your own numbers

How much is left?

Weigh in grams with the cap on and the box off. The full and empty weights fill in from people's reports when you pick a bottle; type your own to override them.

––ml
fill –– %
Enter the weight on your scale.

Report a weight

Pick a bottle first. One full weight and one empty weight per person per bottle; send a new number any time to replace yours.

How the numbers work

Fill estimate

With a full and an empty weight for the bottle, the fill is the share of juice weight still there. No density is needed:

fill = (now − empty) ÷ (full − empty)

With only one of the two, Heavy Scent converts grams of juice to ml using 0.85 g/ml and shows the range from 0.835 to 0.865 g/ml.

Where 0.85 g/ml comes from

Two eau de parfum safety data sheets: one lists a density of 0.835 to 0.865 g/cm³ (Mix:Bar Eau de Parfum), the other a relative density of 0.8509 to 0.8511 at 20 °C (Guy Laroche Drakkar Bleu Eau de Parfum). Other concentrations can differ, which is why a full and empty weight beats a density guess.

Certainty score

Reports within 3% (or 5 g) of the middle value count as agreeing. The score grows with each agreeing report and drops when reports disagree:

score = 100 × (1 − 0.75^agreeing) × agreeing ÷ total

One report scores 25, three agreeing about 58, five about 76, ten about 94. Shop listing weights are shown for reference only and never counted, because they usually include the box.

Heavy Scent gives estimates for trades and resale, not guarantees. Weights come from the people who report them and from the shop pages linked beside each figure.