Shampoo Bar Cost Per Wash
Quick answer
Three bars in this dataset publish enough to calculate price per wash: Kitsch's Rice Water Protein bar at up to $0.16 ($16 for up to 100 washes), Ethique's Hydrating bar at $0.175 or less ($14 for 80+ washes), and Bottle None's beYOU pair at $0.80 or less ($40 for a shampoo and conditioner pair labeled 50+ washes). Every other brand's wash count is not published, so no per-wash figure is shown for them.
Key takeaways
- Price per wash = bar price divided by the brand's published washes; published counts are 'up to' or 'plus' figures, so results are bounds.
- Kitsch rice: $16 / 100 = $0.16. Ethique Hydrating: $14 / 80 = $0.175. Bottle None pair: $40 / 50 = $0.80 for two bars.
- Price per 100 g runs from $7.52 (Chagrin Valley) to about $27.59 (Bottle None): bar weight differs more than bar price.
- Brands that publish only a bottle equivalence get a break-even bottle price instead of a per-wash number.
How do you calculate price per wash?
Divide the price by the washes the brand says one bar delivers. Use only the brand's published count and keep its qualifier.
price per wash = bar price / published washes
Two cautions. First, published counts are marketing figures and depend on hair length and how you lather; Ethique says as much on its page. Second, 'up to 100' (Kitsch) is a ceiling and '80+' (Ethique) is a floor, so the first result is a lower bound on cost and the second an upper bound.
Which shampoo bars publish a wash count?
| Bar | Price | Published washes | Source wording | Price per wash |
|---|---|---|---|---|
| Kitsch Rice Water Protein | $16 | Up to 100 | One bar lasts up to 100 washes when using approx. 0.032 oz per wash | $16 / 100 = $0.16 or more |
| Ethique Hydrating | $14 | 80+ | On average, one bar gives 80+ washes | $14 / 80 = $0.175 or less |
| Bottle None beYOU pair (1 shampoo + 1 conditioner bar) | $40 | 50+ | Bundle variant labeled 50+ washes | $40 / 50 = $0.80 or less, for two bars |
| Kitsch (other four bars) | $16 | Not published | Bottle equivalence only | Not published |
| HiBAR (Moisturize, Curl, Volumize) | $14.95 | Not published | Bottle equivalence only | Not published |
| Chagrin Valley | $11.95 | Not published | None | Not published |
| J.R. Liggett's | $9.25 | Not published | 2 to 3 bottles | Not published |
Kitsch's footnote also lets you back out an implied bar size: 100 washes at 0.032 oz is 3.2 oz, about 91 g. Kitsch does not state the bar weight on the page, so regard that as arithmetic from its footnote rather than a published weight.
What does each bar cost per 100 grams?
Where weight is published you can compare price per unit of soap, whatever the wash count. Conversions use 28.35 g per oz.
| Bar | Price | Published weight | Price per 100 g |
|---|---|---|---|
| Chagrin Valley (full bar) | $11.95 | 5.6 oz / 159 g | $7.52 |
| J.R. Liggett's Original | $9.25 | 3.5 oz in title (about 99 g); weight field says 4 oz | $9.32 (3.5 oz basis) |
| Ethique (all five bars checked) | $14 | 110 g / 3.9 oz | $12.73 |
| Bottle None (single bar) | $20 | 70-75 g | $26.67 to $28.57 |
| Chagrin Valley travel bar | $4.10 | 1.7 oz (about 48 g) | $8.51 |
| Kitsch, HiBAR | $16 / $14.95 | Not published on the page | Not published |
Price per gram is not price per wash: soap-based bars and syndet bars lather differently, and a heavier bar may be used faster. It still shows that the headline price hides a threefold range in how much bar you receive.
What are the break-even bottle prices?
Where a brand publishes only a bottle equivalence, divide the bar price by the bottles it claims to replace:
| Bar | Bar price | Claim | Break-even |
|---|---|---|---|
| Kitsch Tea Tree & Mint | $16 | Two 16 oz or one 32 oz bottle | $8.00 per 16 oz bottle |
| Ethique | $14 | Three bottles | $4.67 per bottle |
| HiBAR Fragrance-Free | $14.95 | Two 24 oz bottles | $7.48 per bottle |
| J.R. Liggett's | $9.25 | Two to three bottles | $3.08 to $4.63 per bottle |
A bar is cheaper than your bottled shampoo if you pay more than the break-even figure per bottle. The full comparison is on shampoo bar vs bottled shampoo.
How should you budget for a switch?
Add the pieces brands sell separately. Matching conditioner bars are priced separately: $16.25 (J.R. Liggett's), $14.95 (HiBAR Moisturize and Curl) and $20 (Bottle None). Dishes and cases add $8.95 to $25 depending on brand. Chagrin Valley's travel-size bar at $4.10 and HiBAR's shampoo bar sampler at $10.95 are the lowest-cost ways to try a format before buying full size. For wash counts per bar see how long a shampoo bar lasts.
Frequently asked questions
What is the cheapest shampoo bar per wash?
Among bars with a published wash count, Kitsch's Rice Water Protein bar at up to $0.16 per wash is lowest, then Ethique's Hydrating bar at $0.175 or less. Other brands do not publish counts.
Why is there no price per wash for HiBAR or Chagrin Valley?
Neither publishes a wash count. HiBAR states only that a bar lasts as long as two bottles (or at least one 24 oz bottle in its FAQ), and Chagrin Valley publishes none.
Is 'up to 100 washes' realistic?
Kitsch qualifies it as based on approx. 0.032 oz per wash. Your result depends on hair length, thickness and how much you use.
Is the conditioner bar included in the price?
No. Shampoo and conditioner bars are priced separately, except bundles such as Bottle None's labeled pair at $40.
Do the prices change?
These are the prices on each brand's page on 8 October 2026. Brands change prices and run promotions, so check the page before you buy.
Sources
- Kitsch Rice Water Protein Shampoo Bar
- Ethique Hydrating Shampoo Bar
- Bottle None beYOU bundle (wash-labeled)
- Bottle None be YOU Shampoo Bar
- HiBAR Fragrance-Free Moisturize Shampoo Bar
- J.R. Liggett's shampoo bar collection
- Chagrin Valley Cocoa Butter & Olive Shampoo Bar
- Chagrin Valley product feed (travel bar price)
- HiBAR shampoo bar sampler
- J.R. Liggett's conditioner bar