Vegan Soap Calculator — 100% Plant Oil Blend

A vegan soap calculator here means: you enter total oil grams and four plant-based oils as percents of total oils—coconut, olive, shea, sunflower in our default layout—and the tool outputs grams per line. Vegan formulation excludes animal fats (lard, tallow), dairy, honey, silk, and other animal inputs in the finished good you intend to label vegan. The calculator does not certify vegan status; it removes arithmetic errors so your lye sheet matches the oils you actually weigh.

Many classic “grandma” recipes lean on animal fats for hardness and cost. Modern vegan soap lines substitute palm, cocoa butter, coconut, and soft oils—each shifts trace, color, and environmental story. Customers who buy vegan expect alignment from oils through additives: a beeswax line in the same studio may require equipment notes or separate days. Clear batch cards prevent accidental cross-use of non-vegan micas or milk powders.

Let T = total oil grams. Let a, b, c, d be percents for coconut, olive, shea, sunflower with a + b + c + d = 100. Grams_coconut = T × (a ÷ 100), and similarly for each oil. Round only at the end if needed; tiny rounding drift can shift lye slightly—many makers nudge the last gram to match the scale. After weighing, enter gram oils into the soap calculator; NaOH follows SAP, not the word “vegan.”

If you substitute rice bran for sunflower, update SAP values and the label—percent slots are flexible; chemistry is not.

Total oils: 1,780 g. Split: 32% coconut, 28% olive, 27% shea, 13% sunflower.

Grams: coconut 569.6 g; olive 498.4 g; shea 480.6 g; sunflower 231.4 g.

That shea slice keeps skinfeel in a mostly vegan grocery palette without leaning on animal fats for hardness—still verify hardness after cure before you promise a long-lasting shower bar.

Before printing grams, scan additives for beeswax, milk, silk, carmine, and animal-derived glycerin claims. Only then weigh oils in descending order of cost or melt point—your choice—but record lot numbers as you go. If you share equipment with a tallow line, note sanitation and production-day separation on the vegan batch card.

Balanced body bar: Moderate coconut for bubbles, olive and sunflower for glide, shea for skinfeel—tune to 100%, then scale for production. Market differentiation: Publish actual shea and coconut percentages when you use “vegan shea soap” language. Palm policy: If you avoid palm, replace that hardness with cocoa or a calculated blend and document the change in hardness after cure—see hardness tools.

• Vegan oils but non-vegan additives — honey powder or goat milk in the same formula breaks the claim.
• Assuming fragrance is vegan — some musks and colorants are animal-derived; read SDS and supplier vegan statements.
• Ignoring superfat and soft bars — vegan blends can be slow to harden; cure fully before retail.
• Keyword stuffing — “vegan” should reflect formulation, not repetition in every sentence.

For castile-style simplicity see the castile soap calculator; for hair-focused vegan bars try the shampoo bar calculator. Use batch size when you only think in percents. Audit every additive against your vegan promise and keep supplier letters on file for insurance and retail partners.

Snapshot old gram sheets when you change soft oils—trace speed shifts with them.