Best dish soap for the money (September 2026)
The best-value dish soap on Dealophant is the listing with the lowest live price per fluid ounce, not the lowest sticker price. Dealophant ranks every dish soap by total Amazon price divided by fluid ounce count, so "best value" always means the lowest real cost per fluid ounce.
Compare dish soap prices per ounce on Amazon. Find the best value on Dawn, Palmolive, Ajax, and more.
Compare Dish Soap Prices Per Ounce
How "best value" is decided
"Best value" on Dealophant means the listing with the lowest computed price per fluid ounce in the current Amazon Product Advertising API result set, within the dominant unit family of the search. Ranking is purely totalPrice ÷ unitCount, ascending. Affiliate commission does not enter the math, even when it would help our revenue. The full methodology is at /how-it-works.
We calculate price per fluid ounce to compare across all bottle sizes and brands.
The live ranking is at https://dealophant.com/compare/dish-soap. Prices update on every search and the "Best Value" badge marks the cheapest listing in the dominant family.
Top dish soap ranked by price per fluid ounce
Ajax Ultra Liquid Dish Soap, Lime Scent with Vinegar, 90 fl oz — $0.0663/fl oz ($5.97 total)
Ajax Ultra Liquid Dish Soap, Triple Action, Orange Scent, 90 fl oz — $0.0697/fl oz ($6.27 total)
Ajax Ultra Liquid Dish Soap, Triple Action, Orange Scent, 52 fl oz — $0.0763/fl oz ($3.97 total)
Ajax Ultra Liquid Dish Soap, Strips Grease, Watermelon Scent, 52 fl oz — $0.0763/fl oz ($3.97 total)
Amazon Basics Liquid Dish Soap, Fresh Scent, Grease-cutting Formula, 30 Fl Oz, Pack of 1 — $0.1010/fl oz ($3.03 total)
Gain Ultra Liquid Dish Soap, Dishwashing Liquid, Grease Removal, Original Scent, 38 Fl Oz (Pack of 1) — $0.1037/fl oz ($3.94 total)
Amazon Basics Dish Soap, Fresh Scent, 50 fl oz, Pack of 1, Packaging May Vary — $0.1040/fl oz ($5.20 total)
Palmolive Ultra Liquid Dish Soap, Oxy Power Degreaser - 32.5 Fluid Ounce (4 Pack) — $0.1218/fl oz ($15.84 total)
Palmolive Ultra Dishwashing Liquid Dish Soap, Pure + Clear Fragrance Free - 32.5 Fluid Ounce (Packaging may vary) — $0.1228/fl oz ($3.99 total)
Palmolive Ultra Concentrated Antibacterial Liquid Dish Soap, Orange Scent, 32.5 Fluid Ounce — $0.1289/fl oz ($4.19 total)
How to actually find the cheapest dish soap
- Refill sizes (56-90 oz) are almost always the best per-ounce value
- Concentrated formulas use less per dish — factor that into your real cost
- Dawn, Ajax, and Palmolive all compete aggressively — the cheapest rotates with sales
Frequently asked questions about dish soap
- What is the cheapest dish soap per ounce?
- The cheapest dish soap per ounce on Amazon is typically found in large refill bottles (56-90 oz) from brands like Ajax, Dawn, or Palmolive, often dropping below $0.10 per ounce. Dealophant shows real-time per-ounce pricing across all brands and sizes.
- Is concentrated dish soap a better value?
- Concentrated dish soap uses less product per wash, which can make it cheaper per use even if the per-ounce price is higher. However, many people use the same amount regardless, negating the benefit. Compare the per-ounce cost on Dealophant and adjust for your usage.
- Should I buy dish soap in bulk on Amazon?
- Yes. A 90 oz refill bottle typically costs 50-70% less per ounce than a standard 7-8 oz bottle. If you use dish soap daily, buying the largest size saves $20-30 per year. Add Subscribe & Save for an additional 5-15% off.
- What's the cheapest dish soap per fluid ounce on Amazon right now?
- Dealophant ranks every dish soap listing on Amazon by live price per fluid ounce, recalculated from the Amazon Product Advertising API on each search. The cheapest in-stock listing appears at the top of https://dealophant.com/compare/dish-soap. Prices change frequently — verify on Amazon before buying.
- How does Dealophant calculate price per fluid ounce for dish soap?
- Total listing price is divided by the canonical fluid ounce count extracted from the product title. dish soap is best compared by volume (price per fluid ounce). 1 gal = 128 fl oz; 1 L ≈ 33.8 fl oz. Single-bottle pricing and pack count both lose meaning when bottle sizes differ across listings. Cross-unit listings (for example a serving-count tub mixed in with weight-based tubs) are shown separately under "Other formats" so the price-per-fluid ounce ranking stays apples-to-apples.
- Is bulk dish soap actually cheaper per fluid ounce?
- Usually yes, but not always — Dealophant has seen single-pack dish soap undercut bulk on a per-fluid ounce basis when the smaller size is on sale or has a Subscribe & Save discount the bulk listing doesn't. That's why Dealophant always recomputes per-fluid ounce price live rather than assuming bigger = cheaper.
- What's the typical price range per fluid ounce for dish soap?
- It varies by brand, format, and current promotions. To see the live range, sort the listings at https://dealophant.com/compare/dish-soap by Price Per Unit ascending — the cheapest and most expensive in-stock options are visible immediately. The "Best Value" badge marks the lowest price per fluid ounce in the current result set.