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Soap cost calculator

See what one bar really costs, materials, packaging and your time included, and what to charge. It starts with a real example: lavender cold process soap. Change it to yours. No signup.

Updated . Example prices checked on supplier sites the same month.

Oils and butters

Weight in the batch, and what you paid for the pack it came from.

$6.27
In batch
Pack price
Pack size
$2.16
In batch
Pack price
Pack size
$2.71
In batch
Pack price
Pack size
$0.82
In batch
Pack price
Pack size
Lye

Type the lye weight from a lye calculator. This tool does not work out lye on purpose: the amount must be exact and depends on your oils and superfat.

$2.37
In batch
Pack price
Pack size
Water
$0.10
In batch
Pack price
Pack size
Additives

Fragrance, essential oils, colorants, clays.

$2.28
In batch
Pack price
Pack size
Packaging per bar
Batch
min
/hr
Method (for the cure reminder)
%

The share of the price you keep as profit. 50% means the price is twice your cost.

Example prices, October 2026. Change them to yours.

Cost per bar$4.67Price $11.68 at 60%

Cost per bar

$4.67

Sell at $11.68 for a 60% margin, a profit of $7.01 per bar.

Ingredients per batch$16.71
Packaging per batch$0.00
Labour per batch$30.00
Cost per batch$46.71
Cost per 100 g$4.12
Suggested price per bar$11.68
Cure time: 4 to 6 weeks. Cold process bars need 4 to 6 weeks to cure before you sell them. Make stock at least 6 weeks before a market.

Keep this recipe. Stockria saves it with your materials, so the cost updates when a price changes and each batch you make takes stock off the shelf.

Want us to set it up for you?

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.

Cost of Lavender cold process soap, 10 bars
MaterialUsedCost
Olive oil (pomace)$7.16 for 1 lb14 oz$6.27
Coconut oil 76$30.71 for 8 lb9 oz$2.16
Shea butter$36.12 for 5 lb6 oz$2.71
Castor oil$4.39 for 1 lb3 oz$0.82
Sodium hydroxide (lye)$17.06 for 2 lb4.45 oz$2.37
Distilled water$1.50 for 1 gal9 oz$0.10
Lavender fragrance oil$24.10 for 16 fl oz1.5 oz$2.28
Labour: 1 h 30 min at $20.00/hr$30.00
Total for 10 bars$46.71
Cost per bar$4.67
Where the example prices come from

Prices change and shipping is extra. They are here to make the example real, not as a quote. Put your own prices in the calculator.

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.

Soap Cost Calculator: Cost Per Bar | Stockria