The Real Cost of Milk on Amazon — Every Type Ranked by Price Per Ounce

Currently the cheapest milk on Amazon per ounce — same $0.04/oz as the 2% half gallon when it's in stock. A full gallon of whole milk for $5.19 delivered is genuinely hard to beat. Whole milk is richer, better for cooking and coffee, and more filling. Buying the gallon over the half gallon almost always drops the per-ounce cost — this is the rule with basically every liquid on Amazon.

All fat levels — whole, 2%, 1%, and fat free — come in at the same price from the 365 Whole Foods brand. Going organic costs about $0.03 more per ounce than regular. If you're going organic, whole milk is the best value since you're already paying the organic premium — might as well get the richest version. Half gallon also available if you don't go through milk fast enough to justify a gallon.

Lactaid comes in whole, 2%, and 1% — all at the same price. Same milk, same nutrition, the lactose enzyme is just already broken down. If dairy gives you issues this is the move. At $0.08 per ounce it's a small step up from the basic options. The gallon is slightly cheaper per ounce if you go through it fast. No reason to deal with discomfort when the alternative costs this little.

A2 milk only contains the A2 protein — a lot of people who think they're lactose intolerant are actually reacting to the A1 protein in most conventional milk. A2 cuts that out. Comes in whole, 2%, and 1% all at the same price. Same cost as organic or Lactaid, different benefit. Worth trying if regular milk has ever bothered your stomach but you didn't want to fully commit to lactose free. Gallon is slightly cheaper per ounce if you go through it quickly.

The premium option — organic and lactose free in one. $5.49 for a half gallon is still reasonable for what you're getting. If you want both the organic sourcing and the digestive ease, this is the only type that covers both.