Crafts & Making
Candle Wax Calculator
Estimate batch mass and the wax and fragrance split for multiple containers.
Enter your measurements
Results update as you type.
About this calculator
Enter the fill mass per container — or a fill volume with the mixed density you measured — the number of containers and your chosen fragrance percentage. State whether the percentage is based on the wax mass or the finished mixture mass; the two give different wax and fragrance amounts.
How to measure
- Measure the finished mixture fill mass for one container, or its fill volume with a measured mixed density.
- Enter the number of identical containers and your chosen extra allowance.
- Specify whether fragrance percentage is based on wax mass or finished-mixture mass; the two conventions give different splits.
How to use this calculator
- Measure the fill mass or volume per container.
- Enter the number of containers and any extra allowance.
- Choose the fragrance percentage and its basis.
- Calculate for total wax and fragrance mass.
Formula
Batch mass = fill mass × containers × (1 + extra ÷ 100)
Wax basis: wax = batch ÷ (1 + p ÷ 100); fragrance = batch − wax
Mixture basis: fragrance = batch × p ÷ 100; wax = batch − fragrance
Assumptions
- Every container is filled identically.
- The fragrance percentage is exactly as you entered it.
- Volume is converted only with the mixed density you supply.
Common mistakes
- Using water weight as wax-mixture weight.
- Confusing fragrance percentage of wax with percentage of the final mixture.
- Using a pure-wax density as a guaranteed fragrance-mixture density.
Worked example
Try it: press “Load example” above the form.
Four 150 g fills are 600 g; at 10% on wax mass, use 545.45 g wax and 54.55 g fragrance.
Limitations
No wick choice, burn safety, heating or pouring temperature, or safe fragrance-load recommendation. Numeric validity is not product approval.
Frequently asked questions
Is fragrance percentage based on wax or finished mixture?
Those bases differ. Select the intended basis before entering a percentage. A percentage of wax mass is not the same fraction of the final wax-and-fragrance mixture.
Can I use water weight as wax weight?
No. Water and a wax-fragrance mixture have different densities. Use a measured fill mass, or provide a valid mixed density for volume-based filling.
What does the worked example show?
Four 150 g fills are 600 g; at 10% on wax mass, use 545.45 g wax and 54.55 g fragrance.
Which assumptions should I check before using the result?
No wick choice, burn safety, heating or pouring temperature, or safe fragrance-load recommendation. Numeric validity is not product approval.
Sources
Sources explain the methods and any named product presets. Check your product label where coverage, yield or density differs.
- CandleScience: fragrance calculations
Percentage convention context only; no fragrance load, density or burn-safety recommendation.
Calculation documentation · Updated 2026-11-08 · Version 1.6.4. Estimates are planning aids. Confirm quantities, coverage and prices with your supplier before purchasing. Found an error? Report it.
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