The example, line by line
A home soap maker usually makes 2 to 3 lb of oils at a time in a loaf mold and cuts 10 to 12 bars. This example uses 32 oz of oils and cuts 10 bars of about 4 oz each after the cure. Here is the batch the calculator starts with, worked out the same way. It makes 10 bars at $4.67 each.
How this is calculated
- Cost of each material = pack price / pack size x amount used, after the units are changed to match.
- Cost per batch = all materials + packaging for every bar + your time. In the example: $46.71.
- Cost per bar = cost per batch / bars made. $46.71 / 10 = $4.67.
- Price = cost per bar / (1 - margin). At 60%: $11.68.
Want the reasoning behind each step, with tips for soap makers? Read how to price a bar of soap.
Frequently asked questions
How much does it cost to make a bar of soap?
In the example on this page (lavender cold process soap, 10 bars per batch, prices from October 2026), one bar costs $4.67. That counts every material, packaging and 1 h 30 min of labour at $20.00 an hour. Your cost depends on your prices and your batch size, so put in your own numbers.
What should I charge for a bar of soap?
Divide your cost per bar by 1 minus the margin you want. With a cost of $4.67 and a 60% margin, the price is $4.67 / 0.40 = $11.68. If you also sell wholesale, check that half of that price still covers your cost.
Where do the example prices come from?
From supplier product pages checked in October 2026: Wholesale Supplies Plus, grocery store. Shipping is not included. The prices make the example real; they are not a quote, so change them to what you paid.
Can I save this soap recipe?
Yes. Click "Save this as a recipe in Stockria". A free account opens with your materials and this bar as a product made from them, costed the same way as here. When a material price changes, the cost per bar changes with it.
Does this calculator change units for me?
Yes. Enter the amount you use and the pack you buy in any unit of the same kind: grams with kilos, ounces or pounds; millilitres with litres or fluid ounces; millimetres with metres, inches or feet. The calculator converts before it does the maths.