Laundry Soap Calculator — Oil Blend for Washing Clothes

A laundry soap calculator on SoapLab splits your total oil weight across four recipe lines—coconut, olive, castor, and a flexible “other” slot (rice bran, high-oleic sunflower, etc.)—using percentages that must total 100%. It outputs grams per oil so your batch card matches the soap calculator lye step. The math is the same as any percent recipe: grams for oil A = total oils × (A% ÷ 100). The word “laundry” here means design intent: higher cleansing tendency and usually lower superfat than a face bar—not a legal product category by itself.

Clothes need grease and particulate lifted from fibers; skin needs a different balance of mildness and superfat. A coconut-heavy laundry soap recipe can clean aggressively enough for some wash routines, but hard water may form soap curd with minerals—users in those regions often combine strategies (rinse aids, washing soda, chelants) per mainstream detergent guidance. Separating “laundry” from “body” in your studio prevents accidentally selling a low-superfat strip bar as a daily face soap. Use quality indices to compare how your laundry blend differs from your spa line on paper before you pour.

Pick total oils (T) in grams. Assign percents P₁…P₄ that sum to 100. For each oil: gramsᵢ = T × (Pᵢ ÷ 100). Example: T = 2,360 g, split 52/16/14/18 → coconut 1,227.2 g, olive 377.6 g, castor 330.4 g, other 424.8 g. Sum all four lines; they should equal T within rounding. Then enter gram oils into the soap calculator with your chosen superfat—laundry bars often run lower superfat than skin bars so less unsaponified fat redeposits on fabric.

Print “laundry” on the batch card header, set superfat in the soap calculator for wash intent, then weigh oils from this tool’s gram outputs. Keep a separate SKU for skin bars so no one grabs the wrong loaf at a craft fair.

Camping and travel: Bars beat bottle weight; grate a measured amount into a mesh bag for river washing where regulations allow. Zero-waste shops: Sell flakes with clear “test on hidden seam” instructions. Hard water: Document that soap-only washing may need help—link customers to care labels rather than promising universal results. HE machines: Suds control varies; never assume a CP bar behaves like a formulated low-suds detergent.

• Using skin superfat on laundry bars — oils can build up on textiles.
• Ignoring fabric dyes and delicates — always cold-test wool and silk.
• Promising stain removal — protein, tannin, and dye stains often need enzymes or oxygen chemistry beyond soap.
• Skipping batch codes — laundry recipes still need traceability for recalls and feedback.

Pair batch logging with yield so you know bars per pour. Use recipe optimizer with a laundry goal to explore cleansing shifts. Hybrid workflows—bar plus measured booster—should be labeled honestly. Regulation for cleaning claims differs by region; keep cosmetic vs detergent rules straight for your storefront.