📏 Candle Batch Scaling Calculator

Scale your candle recipe proportionally to a new batch size — every ingredient scales by the same ratio.

One factor, applied to every row

The calculator divides your target wax weight by the recipe's original wax weight and multiplies each ingredient by the result:

scale       = new wax weight / original wax weight
each amount = original amount × scale

The loaded recipe is 454 g of wax (one pound) with 36.3 g of fragrance oil. Ask for 1000 g and the scale factor is ×2.203, giving 1000.00 g of wax and 79.96 g of oil. Because a single factor drives every row, the ratios between your ingredients never move.

Watch the fragrance load, not the gram count

That 36.3 g against 454 g of wax is a fragrance load of exactly 8 percent, the usual starting point. Scaling keeps the percentage, so it is the original recipe that has to be right:

LoadPer 454 g (1 lb) waxTypical use
6%27.2 glight scent, delicate oils
8%36.3 gstandard container candle
10%45.4 gmaximum for most soy waxes
Fragrance load is a percentage of wax weight, so enter wax only in the two totals — put the combined wax-plus-oil weight in and every scaled figure comes out low. Past the wax's rated load the oil will not bind: it sweats out on the surface and pools at the base, which is a fire risk rather than a stronger scent.

Frequently asked questions

How much fragrance oil per pound of wax?

At the standard 8 percent load, 36.3 g (1.28 oz) per 454 g pound. Six percent gives a soft scent at 27.2 g; 10 percent, or 45.4 g, is as far as most soy waxes go.

How do I double a candle recipe?

Put the original wax weight in the first box and twice that in the second. The scale factor reads ×2.000 and every ingredient row doubles, fragrance included.

Do I need to weigh to two decimal places?

No. Round wax to the nearest gram on a kitchen scale, but weigh fragrance oil on a 0.1 g jeweller's scale — a few grams out on a small batch shifts the load by a whole percentage point.