NEW
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Olaplex Nº.5 Bond Maintenance™ Hair Strengthening Conditioner:…
$2.84Cost / fl oz
Price checked Jul 22 · confirm on Amazonpack price$96.00
subscribe & save$2.70−5%
Olaplex · Amazon
See on Amazon Olaplex vs Kérastase
Which is cheaper per fl oz? Ranked from real, continuously tracked Amazon US prices — not sticker prices.
Olaplex wins on cost per fl oz
As of July 2026, Olaplex is cheaper per fl oz: about $4.73/fl oz at the median vs $5.88/fl oz for Kérastase — across 21 Olaplex and 63 Kérastase deals we track. Prices re-checked continuously.
| Per fl oz | Olaplex | Kérastase |
|---|---|---|
| Median | $4.73 | $5.88 |
| Cheapest | $2.84 | $3.55 |
| Products tracked | 21 | 63 |
See all of each brand ranked by cost per fl oz: Olaplex, Kérastase · or the best hair & body of 2026.
Cheapest Olaplex per fl oz
NEW
✨ New🧴Hair & body
Olaplex Nº.4C Bond Maintenance™ Clarifying Deep Cleansing…
$4.00Cost / fl oz
Price checked Jul 22 · confirm on Amazonpack price$34.00
subscribe & save$3.80−5%
Olaplex · Amazon
See on Amazon +55°
🧴Hair & body
Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo:…
$4.02Cost / fl oz
Price checked Jul 22 · confirm on Amazonpack price$34.00
subscribe & save$3.82−5%
Olaplex · Amazon
See on Amazon NEW
✨ New🧴Hair & body
Olaplex Nº. 4 FINE Bond Maintenance Shampoo: Volumize…
$4.02Cost / fl oz
Price checked Jul 22 · confirm on Amazonpack price$34.00
subscribe & save$3.82−5%
Olaplex · Amazon
See on Amazon Cheapest Kérastase per fl oz
+68°
🧴Hair & body
Nutritive Bain Satin Riche Shampoo - Cleanses & Strengthens…
$3.55Cost / fl oz
Price checked Jul 21 · confirm on Amazonpack price$60.00
Kérastase · Amazon
See on Amazon +64°
🧴Hair & body
KÉRASTASE Gloss Absolu Bain Crème Hydra-Illuminating Refill…
$3.55Cost / fl oz
Price checked Jul 21 · confirm on Amazonpack price$60.00
Kérastase · Amazon
See on Amazon NEW
✨ New🧴Hair & body
Kerastase Densifique Densité Shampoo - Thickening…
$3.67Cost / fl oz
Price checked Jul 22 · confirm on Amazonpack price$62.00
Kérastase · Amazon
See on Amazon NEW
✨ New🧴Hair & body
Kerastase Nutritive Bain Satin Riche Shampoo - Cleanses…
$3.79Cost / fl oz
Price checked Jul 22 · confirm on Amazonpack price$64.00
Kérastase · Amazon
See on Amazon