Formulate with proof. Make with control.

A calm, transparent soap workspace—from oil blend to cure date.

151Oil references

Recipe setup

The essentials stay visible. Deeper controls appear only when they matter.

Recipe name

Soap process

Alkali system

Total oil weightUnit

Superfat5%0%25%Cure or rest perioddaysWater methodWater setting%

Lye purity

NaOH purity%Use a lye masterbatch

Batch notes

Oil formula

Build by percentage. The calculator never changes your formula silently.

%700 g

%250 g

%50 g

Formula total100%

100% oil formula. Calculation is active.

Choose how superfat is created

These methods use different lye math. Pick the one that matches your process.

Superfat rate5%0%25%

5%Superfat

Reduces the calculated lye. The oil formula remains 100% and no specific oil is guaranteed to remain.

Recipe tunerChange one oil and rebalance the unlocked oils.

70.0%

25.0%

5.0%

Closest formulation alternatives

Similarity compares fatty acids, SAP, iodine, and INS. Recheck the complete formula after every substitution.

Add a custom oilUse a supplier or laboratory reference for its SAP profile.

NameSAP NaOHSAP KOHIodineINSLauricMyristicPalmiticStearicRicinoleicOleicLinoleicLinolenic

Live formula

Calculation complete

Total batch

1,424.4g

Total lye140.1 g

Water284.4 g

Oils1,000 g

Lye concentration33%Water : lye ratio2.03 : 1

Formula fingerprint

Weighted predictions, not promises. Process and ingredients still matter.

Hardness

31.8Planning range 29–54

Cleansing

16.8Planning range 12–22

Conditioning

64.1Planning range 44–69

Bubbly

21.3Planning range 14–46

Creamy

19.5Planning range 16–48

Iodine 66.3dimensionless index · Planning range 41–70INS 145.6dimensionless index · Planning range 136–165

Fatty acids

51.2OLE

12LAU

12.1PAL

2.9STE

4.5RIC

Pre-make statusReady for production

Formula calculation is complete
Liquid and addition plan is valid
No unresolved production blocks

How this was calculated

Each oil weight is multiplied by its average SAP value. Superfat reduces only the oil-saponification alkali. Acid-neutralization alkali is added separately, then purity adjusts the amount you measure.

SOAPFORMULA · Production recipe sheet

Olive Grove No. 1

Cold process · —

CALCULATION COMPLETEFormula calculation: OK · Batch readiness: OK

Process: Cold process
Superfat: 5% · Lye discount
Water method: Lye concentration · 33
Purity: NaOH 99%
Planned cure: 42 days

Total oils: 1,000 g
Total lye: 140.1 g
Process liquid: 284.4 g
Pre-cure batch: 1,424.4 g

Oil formula

Material	Percent	Weight	SAP NaOH	SAP KOH
Olive oil	70%	700 g	0.134	0.188
Coconut oil, 76°	25%	250 g	0.183	0.257
Castor oil	5%	50 g	0.128	0.180
Total oils	100%	1,000 g

Alkali & liquids

NaOH: 140.1 g
Oil saponification: 140.1 g
Distilled water: 284.4 g

Additions by stage

No additions planned.

Formula fingerprint

Hardness: 31.8Planning range: 29–54
Cleansing: 16.8Planning range: 12–22
Conditioning: 64.1Planning range: 44–69
Bubbly: 21.3Planning range: 14–46
Creamy: 19.5Planning range: 16–48
Iodine: 66.3Planning range: 41–70
INS: 145.6Planning range: 136–165

Lauric: 12
Myristic: 4.8
Palmitic: 12.1
Stearic: 2.9
Ricinoleic: 4.5
Oleic: 51.2
Linoleic: 7.7
Linolenic: 0.7

Mold plan

Mold shape: Loaf
Target capacity: 1,512 ml
Usable fill volume: 1,466.6 ml
Oil weight needed: 1,026.6 g
Estimated soap batter: 1,462.4 g
Estimated bars: 10

Batch checklist

Confirm formula and oil totalVerify lye type, purity, and scalePrepare PPE and safe ventilationCheck fragrance and reactive additionsConfirm mold capacity and headspaceRecord actual weights and yield

Batch numberMakerMade onSignature