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Here's a fact that surprises a lot of Dunkin' regulars: a medium iced coffee is a much bigger cup than a medium hot coffee. In fact, it's 10 ounces bigger. That's why the prices don't line up the way you'd expect.
Let's clear up every size.
Disclaimer: This is an independent, unofficial guide and is not affiliated with, endorsed by or sponsored by Dunkin'. All trademarks belong to their owners. Prices, menu items, deals and hours may change and can vary by location. Please check the official Dunkin' website or app for the latest information: www.dunkindonuts.com
Hot vs Iced Cup Sizes
| Size | Hot | Iced |
|---|---|---|
| Small | 10 oz | 16 oz |
| Medium | 14 oz | 24 oz |
| Large | 20 oz | 32 oz |
| Extra Large | 24 oz | Not usually offered |
Iced cups are bigger because ice takes up space.
Caffeine by Size (Approximate)
| Drink | Small | Medium | Large |
|---|---|---|---|
| Hot coffee | ~150 mg | ~210 mg | ~300 mg |
| Iced coffee | ~200 mg | ~297 mg | ~395 mg |
| Cold brew | ~174 mg | ~260 mg | ~347 mg |
| Latte (hot/iced) | ~120 mg | ~166 mg | ~252 mg |
| Refresher | ~66 mg | ~99 mg | ~132 mg |
Price by Size
| Drink | Small | Medium | Large |
|---|---|---|---|
| Hot coffee | $2.09 – $2.99 | $2.49 – $3.39 | $2.89 – $3.79 |
| Iced coffee | $2.89 – $3.79 | $3.29 – $4.29 | $3.69 – $4.79 |
| Latte | $3.79 – $4.79 | $4.29 – $5.49 | $4.79 – $5.99 |
Which Size Is the Best Value?
Price per ounce (mid prices):
| Drink | Small | Medium | Large |
|---|---|---|---|
| Hot coffee | ~25¢/oz | ~21¢/oz | ~17¢/oz |
| Iced coffee | ~21¢/oz | ~16¢/oz | ~13¢/oz |
Winner: the large in both hot and iced. The jump from medium to large usually costs only about 40 cents.
Other Sizes at Dunkin'
| Item | Size |
|---|---|
| Espresso | Single or double shot |
| Box O' Joe | 96 oz (about ten 10-oz cups) |
| Kids' drinks (hot chocolate) | Usually small |
How to Choose the Right Size
- Quick morning boost: small hot coffee.
- All-morning sipper: large hot coffee.
- Hot day: medium iced, with less ice.
- Low caffeine: small Refresher or decaf.
- Big caffeine needs: large cold brew or iced coffee (watch your daily limit).
The FDA suggests most healthy adults stay under about 400 mg of caffeine per day. A large iced coffee alone is close to that.
How to Get the Most Coffee for Your Money
Understanding cup sizes is only the first step. How you order inside that cup decides how much coffee you actually drink.
Ice is the hidden factor
Iced cups are bigger, but a big part of that space is ice. Asking for “light ice” can noticeably increase the amount of coffee you get, usually at no extra cost. If you plan to sip slowly, regular ice keeps the drink colder for longer, so choose based on how fast you drink.
Pick the size by how long you’ll drink it
- Under 20 minutes: a small hot or iced coffee is enough for most people.
- Commute or school run: a medium is the sweet spot.
- Long work session: a large hot coffee gives the best price per ounce, and a lid keeps it warm.
Caffeine planning
Large iced coffee and cold brew can contain close to the amount of caffeine many adults aim to stay under for a whole day. If you have more than one coffee daily, consider a medium for your first drink and a decaf or Refresher later. People who are pregnant, sensitive to caffeine or taking certain medications should talk to a health professional about safe amounts.
Bring your own cup?
Policies on reusable cups vary by location and change over time. If your store accepts them, make sure your cup is clean and know its size in ounces, so the crew can make the drink correctly. Some regions also add small cup fees or offer small discounts, so ask your local store.
Frequently Asked Questions
How many ounces is a medium iced coffee at Dunkin'?
24 ounces.
How many ounces is a large hot coffee at Dunkin'?
20 ounces.
Why is the iced medium bigger than the hot medium?
Iced cups leave room for ice, so they're larger.
Which Dunkin' size has the most caffeine?
A large iced coffee, at around 395 mg.
Is a large Dunkin' coffee worth it?
For price per ounce, yes. It's usually the best value.
The Bottom Line
Dunkin' hot sizes run 10, 14, 20 and 24 oz, and iced sizes run 16, 24 and 32 oz. For the best value, go large; for less caffeine, go small or choose a Refresher.
Last updated: October 11, 2026. Caffeine and prices are approximate; check the Dunkin' app for exact details.
