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I Compared Millions of Products: Costco isn't always better

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Chris
Chris

Costco has famously low bulk prices, right? Yeah, we thought so too. We compared a million products and... turns out you can still save ~40% off of Costco's prices. Read below to see us prove it for batteries, deodorant, and more common daily essentials. And then check out Popgot to find the best prices on your daily essentials across Amazon, Target, Walmart, and, yes, Costco.

Skeptical of Popgot? We keep track of the price per unit of daily essentials, and we're pretty good at it. Combine that with sifting through millions of products, and we find better deals than Costco.

Costco Batteries aren't cheaper

Are AAA Batteries cheaper at Costco? No.

The best buy:

Selection Criteria

Cheaper than 86%
Better rated than 84%
24 count

(That data on this page updates every hour or so, so it has nearly live pricing. )

But the best Costco buy?

Selection Criteria

Cheaper than 76%
Better rated than 61%
24 count
Costco's Best

And at the time of this writing Costco is a little more expensive per battery than the next cheapest retailer. That per-battery price beats ~90% of the other batteries, so it is still a great price -- but not the best. Besides, the Kirkland batteries get a poor rating from customers -- evidently they leak.

If you have the room to really buy bulk, you can actually cut your costs by 50%:

Selection Criteria

Cheaper than 94%
Better rated than 93%
24 count
* We may earn a small commission from affiliate links at no cost to you.
Best Bulk Buy

What about across other batteries? Does Costco fare better?

AA Batteries
amazon
ACDelco 100 AA Super Alkaline Batteries
28¢ / ct
Save 45%
4.727.2k
100
count
vs
costco
Duracell AA Batteries, 40-count
50¢ / ct
4.61.4k
40
count
AAA Batteries
walmart
PKCELL AAA Carbon Zinc Batteries, 40 Pack
25¢ / ct
Save 25%
4.7732
40
count
vs
costco
Kirkland Signature AAA Batteries, 48 Count
33¢ / ct
4.5476
48
count
9V Batteries
walmart
PKCELL 9V Carbon Zinc Batteries, 10 Pack
$1.00 / ct
Save 58%
4.7859
10
count
vs
costco
Duracell 9V Alkaline Batteries, 8-Pack
$2.37 / ct
4.8965
8
count
C Batteries
walmart
Great Value C Batteries 4 Pack
$1.24 / ct
4.6498
4
count
vs
costco
Duracell C Batteries, 14-Pack
$1.21 / ct
Save 2%
4.71.7k
14
count
D Batteries
walmart
Rayovac High Energy D Batteries, 12 Pack
$1.08 / ct
Save 20%
4.7351
12
count
vs
costco
Duracell D Alkaline Batteries, 14-Pack
$1.36 / ct
4.7950
14
count

From AA to D, Costco's prices consistently clock in at a few cents more than its rivals. Ten or twenty cents doesn't sound like much, but multiply that by 48 and you'll see where the bulk "bargain" starts to unravel. Every row in this table tells the same story: Costco is pricier, sometimes by a few cents per battery, sometimes by a dollar, but perhaps surprisingly, the best deals are often found not on Costco. By searching deep into the Amazon, Target, and Walmart price lists, we can usually find batteries that are both better rated and cheaper (per battery) than Costco's picks.

Costco's Hygiene & Toiletries are expensive

Fine, batteries are a mediocre category for Costco. What about toiletries?

Starting with Men's Antiperspirant Deodorant here's the best deal:

Selection Criteria

Cheaper than 99%
Better rated than 79%
7 oz
* We may earn a small commission from affiliate links at no cost to you.
Best Men's Antiperspirant

But the best Costco buy?

Selection Criteria

Cheaper than 95%
Better rated than 75%
7 oz
Costco's Best

Note that we're comparing the price of deodorant per-ounce, not the total price. That makes sense, when you buy deodorant regularly or in bulk, you want to buy by the ounce. Nevertheless, deodorant isn't a great category for Costco. It's a quite a bit more expensive than the next cheapest retailer.

Expanding beyond deodorant, here's a look at body wash, toothpaste, mouthwash, diapers, and pull ups:

Men's Antiperspirant Deodorant
amazon
Speed Stick Fresh Scent 3 Ounce
76¢ / oz
Save 31%
4.7998
3
oz
vs
costco
Degree Men UltraClear+ 2.7 oz, 5-pack
$1.11 / oz
4.7565
52.7
oz
Body Wash
walmart
Parent's Choice 27.1 oz Calming Bath
13¢ / fl oz
Save 42%
4.71.5k
27.1
fl oz
vs
costco
Kirkland Signature Citrus Body Wash, 27 fl oz, 2-pack
22¢ / fl oz
4.6725
227
fl oz
Best Whitening Toothpaste
walmart
Close-Up Cinnamon Blast 8oz (2 pack)
31¢ / oz
Save 44%
4.8958
28
oz
vs
costco
Crest Pro Health Toothpaste, 5.9 oz, 5-pack
55¢ / oz
4.6443
55.8
oz
Mouthwash
walmart
Equate Original Antiseptic Mouthwash 1.5L
8.6¢ / fl oz
Save 33%
4.83.2k
50.7
fl oz
vs
costco
Crest Pro-Health Advanced, 3-pack
13¢ / fl oz
4.8420
333.8
fl oz
Diapers, Size 1
walmart
Parent's Choice Size 1 Diapers, 44 Count
11¢ / ct
Save 50%
4.562.1k
44
count
vs
costco
Huggies Plus Diapers Size 1-2
21¢ / ct
4.74.4k
192
count
Baby Wipes
walmart
Parent's Choice Sensitive Wipes 200ct
2.6¢ / ct
Save 17%
4.82.5k
2100
count
vs
costco
RICO Baby Wipes, 720 Count
3.2¢ / ct
4.81.3k
980
count

Now, before you email me (which is [email protected]) about comparing Costco to sketchy dollar store toothpaste that might actually be wall spackle in disguise, let me explain our methodology. We're not trying to compare Kirkland Signature to junk toothpaste. Here's how we keep things fair:

  • Unit Price: You go to Costco to buy in bulk. That's why we break it down to price-per-unit, not just "big box costs more than small box".
  • Quality Control: Costco selects products that are both great quality and low price. So to keep things fair, we only compare it to products that also have great ratings and enough reviews to prove they weren't all written by a content farm.
  • Apples-to-Apples: We match attributes. Costco whitening toothpaste is compared to non-Costco whitening toothpaste; our antiperspirant deodorant is compared to non-Costco antiperspirant deodorant.

Other Daily Essentials are expensive

Moving on from batteries and toiletries, here's a look at cleaning supplies, paper towels, toilet paper, and more:

Dishwasher Detergent Pods
samsclub
Member's Mark Platinum Clean 105ct
12¢ / ct
4.51.1k
105
count
vs
costco
Kirkland Platinum UltraShine 115 Pacs
12¢ / ct
Save 2%
4.61.3k
115
count
Dishwasher Detergent Liquid
amazon
Cascade Complete Gel - 75 oz
8.6¢ / fl oz
Save 17%
4.710.4k
75
fl oz
vs
costco
Cascade Advanced Power Liquid, 125 oz
10¢ / fl oz
4.82.6k
125
fl oz
Paper Towels
walmart
Great Value Everyday Strong 3 Rolls
86¢ / 100-sheets
Save 31%
4.51.2k
3165
sheets
vs
costco
Kirkland Signature 12 Rolls 2-Ply
$1.25 / 100-sheets
4.834.8k
12160
sheets
Toilet Paper, 2-Ply
walmart
Angel Soft 2-Ply, 18 Mega Rolls
22¢ / 100-sheets
Save 1%
4.748.2k
18320
sheets
vs
costco
Kirkland Signature 2-Ply Bath Tissue, 30 Rolls
22¢ / 100-sheets
4.615.3k
30380
sheets

Note that for the dishwasher detergent pods we compare the price per pod, for the dishwasher detergent liquid we compare the price per fluid ounce, and the powder per ounce.

And for coffee, tea, peanuts, dog supplies, and more -- Costco prices aren't necessarily better.

Ibuprofen
walmart
Equate Ibuprofen 200mg, 100 Count
2.0¢ / serving
4.818.9k
100
serving
vs
costco
Kirkland Ibuprofen 200 mg, 1000 Tablets
1.3¢ / serving
Save 34%
4.83.0k
2500
serving
Coffee, Ground
samsclub
Folgers Classic Medium Roast 43.5oz
34¢ / oz
Save 6%
4.816.5k
43.5
oz
vs
costco
Yuban Gold Coffee, Medium Roast, 46 oz
36¢ / oz
4.7950
46
oz
Coffee, Whole Bean
samsclub
Eight O'Clock Original Medium Roast, 40oz
$5.59 / lb
Save 20%
4.8792
2.5
lb
vs
costco
Jose's Colombia Supremo Whole Bean, 3lbs
$7.00 / lb
4.8291
3
lb
Green Tea Teabags
samsclub
Bigelow Organic Green Tea 160ct
6.0¢ / ct
Save 55%
4.93.1k
160
count
vs
costco
Kirkland Signature Green Tea, 100 Bags
13¢ / ct
4.81.7k
100
count
Gum
amazon
Eclipse Gum Spearmint, 120ct
4.9¢ / pieces
Save 21%
4.72.2k
120
pieces
vs
costco
Dentyne Ice Peppermint Gum, 12-Count
6.2¢ / pieces
4.8142
1216
pieces
Peanuts
target
Good & Gather Lightly Salted Peanuts 16oz
17¢ / oz
4.61.4k
16
oz
vs
costco
Planters Dry Roasted Peanuts 3.25 lbs
16¢ / oz
Save 3%
4.6227
52
oz
Dog Food, Dry
walmart
Ol' Roy Dry Dog Food, 15 lbs
73¢ / lb
Save 27%
4.614.6k
15
lb
vs
costco
Kirkland Signature Small Breed Dog Food 20 lb
$1.00 / lb
4.75.0k
20
lb
Dog Dental Chews
walmart
DreamBone 50 ct Twist Sticks Chews
20¢ / ct
Save 61%
4.83.5k
50
count
vs
costco
Kirkland Dental Chews, 72 Count
51¢ / ct
4.76.1k
72
count

Dig deeper to beat Costco's prices

Look, Costco's pricing game is solid about 90% of the time – they consistently beat the first page of search results on Amazon, Target, or Walmart. And Costco's margins are famously low, so how can we find better deals? The answer is simple: we calculate the price per unit of each product, and then search millions of products. If you're willing to exhaustively dig through each page of search results, you would stumble upon some truly killer deals with even better ratings -- or you could just use Popgot!

So check out Popgot; we make hunting for high quality but inexpensive daily essentials easy.