How this calculation works
Start with measured final-blend density to estimate poured mass. Gross up once for process loss, then separate wax and fragrance according to the selected percentage denominator.
Prepared blend = poured volume × final-blend density / (1 − loss); wax-basis fragrance gives wax = blend / (1 + load)A worked example
Four 200 mL fills at 0.9 g/mL require 720 g poured blend. With no loss and fragrance at 8% of wax mass, weigh about 666.667 g wax and 53.333 g fragrance.
Good to know
Not a fragrance-load, wick, container or burn-safety recommendation. Verify supplier instructions and product testing. Density must represent the final blend; available fragrance is not a limiting input.
Reference: CandleScience: weighing fragrance oil (opens in a new tab) ↗
Read the percentage denominator first
Eight percent of wax means fragrance = 0.08 × wax. Eight percent of final blend instead means fragrance = 0.08 × the combined wax-and-fragrance mass. The resulting recipes differ even though both labels say 8%.
For a fixed total blend, the wax-basis calculation divides by 1.08. The blend-basis calculation allocates 92% to wax. Select the convention used by the formulation rather than guessing from a percentage alone.
Volume does not directly specify ingredient mass
A jar fill stated in millilitres needs a density assumption before it becomes grams. This calculator uses your measured final-blend density, not water density or a hidden universal wax conversion.
Cooling, formulation and filling conditions can affect volume. Measure the intended fill level separately from brim capacity. This arithmetic does not establish a safe headspace, container rating or wick choice.
Gross up process loss once
If 10% of prepared blend is lost, the poured mass is 90% of the starting blend. Dividing by 0.9 supplies enough starting blend; merely multiplying poured mass by 1.1 gives a smaller amount.
The available-wax comparison uses the same per-jar loss assumption and rounds complete jars down. It does not check whether enough fragrance, jars, lids or other materials are available.
Use the result with the next measurement
The packaging dunnage volume and purchase calculator can plan geometric void fill around a finished product. Jar formulation mass and shipping protection still need their own measurements and checks.
Not a fragrance-load, wick, container or burn-safety recommendation. Verify supplier instructions and product testing. Density must represent the final blend; available fragrance is not a limiting input.
A few questions, answered
Is fragrance percentage always based on wax?
No, choose the denominator used by your formulation.
Does 200 mL mean 200 g?
Only if the entered measured density is 1 g/mL.
Are these safe formulation limits?
No, numerical input limits are not product-safety recommendations.