Lotion Bar Ratio Calculator
Work out lotion bars by weight: the 1:1:1 beeswax, butter and oil ratio, adjustable for a harder or softer bar, with a vegan candelilla option and cost per bar.
Weigh a finished bar from your mold, or use the mold's stated capacity for a first batch.
Optional. Enter what you pay per pound for each ingredient.
Your recipe
- BeeswaxSets the hardness · 33.3%4.00 oz0.67 oz
- Solid butterShea, mango or cocoa · 33.3%4.00 oz0.67 oz
- Liquid oilSweet almond, jojoba or similar · 33.3%4.00 oz0.67 oz
- Total batch12.00 oz6 bars
The 1:1:1 lotion bar ratio
A lotion bar is three ingredients in equal parts by weight: beeswax, a solid butter and a liquid oil. Beeswax gives the bar its structure, the butter adds body, and the oil lets it glide onto skin. That balance is the standard starting point for a bar that holds its shape in the hand and melts where it touches warm skin.
Each ingredient = batch weight ÷ 3
Example: 12 oz batch = 4 oz beeswax + 4 oz butter + 4 oz oil
| Batch | Beeswax | Butter | Oil |
|---|---|---|---|
| 6 oz | 2 oz | 2 oz | 2 oz |
| 12 oz | 4 oz | 4 oz | 4 oz |
| 300 g | 100 g | 100 g | 100 g |
Weigh all three rather than measuring by volume. Beeswax pellets, a scoop of butter and a pour of oil take up very different amounts of space for the same weight, so equal cups are not equal parts.
Making a bar harder or softer
Beeswax sets the hardness. More beeswax gives a harder bar that keeps its shape and takes more rubbing to melt onto skin. More oil gives a softer bar that glides easily and melts sooner. The hardness meter in the calculator moves with the beeswax share. Here is how a 12 oz batch changes:
| Ratio | Beeswax | Butter | Oil | Result |
|---|---|---|---|---|
| 1.5 : 1 : 1 | 5.14 oz | 3.43 oz | 3.43 oz | Harder |
| 1 : 1 : 1 | 4 oz | 4 oz | 4 oz | Standard |
| 1 : 1 : 1.5 | 3.43 oz | 3.43 oz | 5.14 oz | Softer |
Change one part at a time between batches, so you know which change made the difference.
Adjusting for climate
Heat softens lotion bars. For summer, or for bars that will ship or ride around in a pocket in hot weather, raise the beeswax a quarter part at a time and test a bar at each step. In cooler weather, go back to 1:1:1 if the harder bar feels stiff on the skin.
Vegan lotion bars: candelilla instead of beeswax
Candelilla wax is a plant wax and the usual replacement for beeswax in vegan lotion bars. It is harder than beeswax, so it goes in at about half the amount.
Switch the calculator to Candelilla and it halves the wax share for you while still filling the same molds. At the standard ratio the recipe becomes 0.5 : 1 : 1, which is 20% candelilla, 40% butter and 40% oil. A 12 oz batch works out to 2.4 oz candelilla, 4.8 oz butter and 4.8 oz oil. Make one test bar before a full batch.
How to make lotion bars
- Weigh the wax, butter and oil.
- Melt the wax and butter together over gentle heat in a double boiler, then stir in the oil until everything is liquid and clear.
- Take the pan off the heat. If you are adding fragrance or essential oil, stir it in now, at the skin-safe rate your supplier gives for leave-on products.
- Pour into molds and let the bars set completely at room temperature before unmolding.
Wax, butter and oil contain no water, so lotion bars are anhydrous and need no preservative as long as they stay dry.
How to scale a batch
Work from your molds. On the By Mold Size tab, enter how many bars you want and what one bar weighs, and the calculator gives the total and each ingredient. Weigh a finished bar from your mold when you can; the capacity printed on a mold is a starting point for the first batch.
The price fields cover the wax, butter and oil. For a retail price that also covers packaging, labels and your time, the candle pricing calculator walks through the same method.
Frequently Asked Questions
What is the ratio for lotion bars?
1:1:1 by weight: equal parts beeswax, solid butter and liquid oil. For a 12 oz batch that is 4 oz of each. Beeswax gives the bar its structure, the butter adds body, and the oil lets it glide onto skin.
How do I make a lotion bar harder?
Raise the beeswax. A ratio of 1.5 parts beeswax to 1 part butter and 1 part oil gives a noticeably harder bar than 1:1:1. Change one part at a time between batches so you know which change made the difference.
Why is my lotion bar too soft or greasy?
There is too little beeswax for the oil in the bar, or the bar is sitting somewhere warm. Raise the beeswax share, or lower the oil. For summer, or bars that will be carried in a pocket, a little extra beeswax keeps them firm.
Can I make lotion bars without beeswax?
Yes. Candelilla wax is the usual vegan swap. It is harder than beeswax, so it goes in at about half the amount: the standard 1:1:1 becomes 0.5 parts candelilla to 1 part butter and 1 part oil. Make one test bar before a full batch.
How much candelilla wax replaces beeswax?
About half the weight. Swapped straight in, 4 oz of beeswax becomes 2 oz of candelilla, which makes the batch smaller. To keep filling the same molds, rescale instead: a 12 oz batch at the standard ratio becomes 2.4 oz candelilla, 4.8 oz butter and 4.8 oz oil. The calculator does this for you.
Do lotion bars need a preservative?
Not as long as they stay anhydrous. Wax, butter and oil contain no water, and bacteria and mold need water to grow. Adding anything water-based changes that, as does storing bars somewhere they stay wet.