Lard vs shea butter in soap
For a bar without animal fat, shea butter is the obvious stand-in for lard, and on the numbers it is close: 45 against 42 for hardness on its own, 54 against 55 for conditioning. Its hardness comes from stearic acid, where lard’s is mostly palmitic. Shea takes 7.3 % less lye, so weigh the lye for lard and use shea, and the bar below comes out at 2.6 % superfat instead of 5 %.
Lard (pure rendered pork fat) Shea Butter Compare them with other oils
The published figures
| Lard | Shea butter | |
|---|---|---|
| Saponification value, mg KOH/g | 192–203 | 179.3–190 (typical 183) |
| Used by the calculator, mg KOH/g | 197.5 (midpoint) | 183.0 (typical) |
| SAP for NaOH, g/g | 0.1408 | 0.1305 |
| Iodine value, g I₂/100 g | 55–65 | 30–75 |
| INS (SAP − IV) | 138 | 131 |
| Melting point, °C | — | 33–40.5 |
| Unsaponifiable matter, % | ≤ 1 | 2.4–11.6 (typical 6.2) |
| Name on a soap label | Sodium Lardate | Sodium Shea Butterate |
Each oil alone
| Lard | Shea butter | Usual range | |
|---|---|---|---|
| Hardness | 42 | 45 | 29–54 |
| Cleansing | 2 | 0 | 12–22 |
| Conditioning | 55 | 54 | 44–69 |
| Bubbly lather | 2 | 0 | 14–46 |
| Creamy lather | 40 | 45 | 16–48 |
A single oil’s hardness, cleansing and the rest are the same sums the calculator shows for a recipe, applied to that one oil. They explain what the oil brings to a blend; they do not predict how a soap of only that oil would feel.
Swapping one for the other
Gram for gram, shea butter takes 7.3 % less lye than lard. For a kilogram of oil at a 5 % superfat, that is 133.8 g of sodium hydroxide for lard and 123.9 g for shea butter.
In the bar below, where it is 35 % of the oils, weigh the lye for one and put in the other without recalculating, and the superfat moves:
| Lye weighed for | Oil used | Superfat |
|---|---|---|
| Lard | Shea butter | 2.6 %recalculate |
| Shea butter | Lard | 7.3 %recalculate |
The superfat is the share of the oils the lye leaves unsaponified, planned here at 5 %; below zero, there is more lye than the oils can take. Put the oil you actually have in the lye calculator and it works out the lye for that oil.
The same bar with either
The bar: 35 % of the one or the other, at a 5 % superfat, for 1,000 g of oils. The rest: 35 % olive oil, 25 % coconut oil, and 5 % castor oil.
| With lard | With shea butter | Usual range | |
|---|---|---|---|
| Sodium hydroxide, g | 141.3 | 137.9 | |
| Hardness | 41 | 42 | 29–54 |
| Cleansing | 18 | 17 | 12–22 |
| Conditioning | 55 | 55 | 44–69 |
| Bubbly lather | 22 | 21 | 14–46 |
| Creamy lather | 27 | 29 | 16–48 |
| Iodine value | 57 | 54 | 41–70 |
| INS | 152 | 149 | 136–165 |
| Linoleic and linolenic acid, % | 8.6 | 7.4 |
Fatty-acid profile
| Fatty acid | Lard | Shea butter | |
|---|---|---|---|
| Myristic acid | C14:0 | 1.8 (1–2.5) | 0.0 |
| Palmitic acid | C16:0 | 25.0 (20–30) | 3.5 (1.9–5) |
| Palmitoleic acid | C16:1 | 3.0 (2–4) | 0.0 |
| Stearic acid | C18:0 | 15.0 (8–22) | 41.7 (27.7–55.7) |
| Oleic acid | C18:1 | 45.0 (35–55) | 47.4 (34–60.7) |
| Linoleic acid | C18:2 | 8.0 (4–12) | 6.2 (4.4–7.9) |
| α-Linolenic acid | C18:3 n-3 | 1.5 (≤ 1.5) | 0.0 |
| Arachidic acid | C20:0 | 1.0 (≤ 1) | 0.9 (0–1.8) |
| Gadoleic acid | C20:1 | 1.5 (≤ 1.5) | 0.0 |
| Erucic acid | C22:1 | 0.5 (≤ 0.5) | 0.0 |
The figure the calculator uses for each oil, as a percentage of its fatty acids, with the published range in brackets.
Recipes with lard
- Old-fashioned lard bar 80 % of the oils
- Budget lard and canola bar 50 % of the oils
- Soy-free lard and sunflower bar 45 % of the oils
- Oatmeal and honey scrub bar 40 % of the oils
- Citrus kitchen bar 35 % of the oils
- Lavender goat milk bar 35 % of the oils
Recipes with shea butter
- 100 % butter bar 60 % of the oils
- African black soap homage 30 % of the oils
- Charcoal pencil line bar 30 % of the oils
- Shea and cocoa butter luxury bar 30 % of the oils
- Butter bar 25 % of the oils
- Goat milk and shea hot process bar 25 % of the oils
Guides
Other comparisons
Where these numbers come from
Lard (pure rendered pork fat)
Section 3 GLC fatty-acid ranges (% of total FA) are mandatory; the Appendix table 'Chemical and physical characteristics' (relative density, refractive index, titre, saponification value, iodine value (Wijs), unsaponifiable matter) is ADVISORY. Later editorial amendments (2019+) not checked - FAO site Cloudflare-gated.
JP XVIII 'Lard' (Adeps Suillus): melting point 36-42 C; congealing point of the fatty acids 36-42 C; acid value NMT 2.0; saponification value 195-203; iodine value 46-70.
Shea Butter
Table 5 (GLC fatty-acid composition of 36 individual shea nut samples) and Results sections 3.2 (NSL/non-saponifiable lipid content, Table 2) and 3.5 (fatty-acid prose ranges) supplied the fattyAcidsPercent and unsaponifiablePercent fields.
Standard for 'Shea butter (Unrefined)': iodine value 30-75, saponification value 160-200 (used for those two fields), unsaponifiable matter not more than 19%, free fatty acids not more than 8%, refractive index 1.4620-1.4650 at 44 C. Item inserted by 2019 amendment, gazetted 2021.
Table 4: traditional wet-extracted butter (SBT) SAP 167.4 mg KOH/g, iodine 21.43 gI2/100g, melting point 33.0 C; solvent-extracted butter (SBS) SAP 202.9 mg KOH/g, iodine 13.19 gI2/100g, melting point 40.5 C. Nigerian samples. Melting-point figures used for the field; its iodine values were treated as an outlier and not used (see notes).
Ivory Coast beige/yellow shea butter: iodine 52.64/53.06 gI2/100g (corroborates the FSSAI-sourced field). Its unsaponifiable matter (17.61%/17.27%) and fatty acids (palmitic 16.42%/26.36%, stearic 32.39%/36.36%, oleic 38.12%/29.09%, linoleic 9.72%/5.92%, arachidic 1.84%/1.59%) were NOT used - inconsistent with Akihisa et al.'s much larger 36-sample dataset, recorded here only for transparency.
Internet Archive capture (3 August 2025) of the FAO file. Table 2: relative density (20 C) 0.91-0.98, density (40 C) 0.89-0.93, saponification value 160-195 mg KOH/g fat, iodine value 30-75, unsaponifiable matter 1-19 % m/m, refractive index at 44 C 1.4620-1.4650, melting point 35-40 C. Table 3: lauric <1, myristic <0.7, palmitic 2-10, palmitoleic <0.3, stearic 25-50, oleic 32-62, linoleic 1-11, linolenic <1, C20:0 <3.5 %. The standard says its limits are broad because they cover shea from all production areas. Regulatory limits, recorded in notes rather than as the band.
Crude Ghanaian shea fat: saponification value 190.0, iodine value 64.2, unsaponifiable 9.0 %, palmitic 4.8, stearic 45.9 %. Sets the maximum.