Coffee Pot Size: How Many Cups in a Pot? (UK Guide)
Quick answer: a "cup" on a coffee pot is 150ml, not the 250ml mug you drink from. So a 10-cup machine makes around 1.25 litres of coffee, which is roughly 4 to 5 normal UK mugs. Most drip machines sold here come in 8, 10 or 12-cup sizes, and the number on the box almost always overstates what you'll actually pour.
That mismatch causes most of the confusion around coffee pots. You buy a "12-cup" machine expecting twelve mugs and get about six. It's not a fault in the machine - it's a measurement convention that dates back to the 5oz American serving cup. Once you know that, picking the right pot size and dosing the right amount of coffee gets simple.
5 Quick Rules for Coffee Pot Sizes
1. One coffee pot "cup" is 150ml. Coffee maker manufacturers use a 5fl oz (150ml) cup as their unit, not a British mug. That's why a 1.5 litre machine is sold as "12 cups" even though it pours closer to six mugs. Always convert the litre figure to mugs, not the cup figure.
2. The three standard sizes are 8, 10 and 12 cups. An 8-cup pot holds about 1.2 litres, a 10-cup pot around 1.25 litres, and a 12-cup pot roughly 1.5 litres. In the UK the Krups KM321 (10-cup, 1.25L) and the Morphy Richards Equip (10-cup) are the sweet spots for households that drink filter coffee every day.
3. Work out how many mugs you actually get. Divide the litre capacity by 0.25 (a standard UK mug). A 750ml pot like the Swan Programmable pours about three mugs, a 1.25L pot pours five, and a 1.5L pot like the GEEPAS 1.5L or Quest Digital 1.5L pours six. Choose a machine that fills your daily mugs in one brew, not one that makes you brew twice.
4. Dose coffee by weight, not scoops. The golden ratio is roughly 1:16 - one gram of coffee to 16 grams of water. A 1.25L pot (1250g of water) needs about 78g of coffee, a 750ml pot needs 47g, and a 1.5L pot needs 94g. A Maestri House S2 coffee scale makes this repeatable, and freshly ground beans from a Timemore Chestnut C2 grinder do more for the taste than any machine upgrade.
5. Match the pot to your household, not the biggest number. One or two mugs a day? An 8-cup pot is plenty and heats faster. Three to five mugs? Go 10-cup. More than that, or you entertain? A 12-cup machine like the Quest Digital 1.5L keeps up. Bigger pots also use more coffee, so your bean bill climbs with the capacity - Union Original Blend at 1kg lasts about 20 pots on a 10-cup machine.
How Much Coffee Per Pot Size
Here's the cheat sheet for the three standard sizes, using the 1:16 ratio:
- 8-cup (1.2L): 75g coffee, about 3 to 4 mugs.
- 10-cup (1.25L): 78g coffee, about 4 to 5 mugs.
- 12-cup (1.5L): 94g coffee, about 5 to 6 mugs.
Start there and adjust to taste. If the coffee tastes weak, add 2-3g before changing anything else. If it tastes harsh or bitter, take 2-3g off. Your grinder, beans and water all shift the result, so treat the table as a starting point, not gospel.
Glass or Thermal Carafe?
The pot matters as much as the size. Glass carafes sit on a hot plate, which keeps coffee warm for 30-40 minutes but can scorch the last cup if you leave it on. Thermal (insulated) carafes keep coffee hot for hours without a hot plate and never burn it. The Krups KM321 uses a glass carafe with a solid keep-warm plate; the Quest Digital 1.5L adds a 40-minute keep-warm cycle. If you brew once and drink slowly, a thermal carafe is worth the extra money.
Frequently Asked Questions
Final Verdict
Buy the pot size that matches your daily mugs, not the biggest number on the box. For most UK households that's a 10-cup machine: the Krups KM321 if you want a proven all-rounder, or the Morphy Richards Equip for a cheaper pour-over style brew. Weigh your coffee with a Maestri House S2 coffee scale, grind fresh with a Timemore Chestnut C2 grinder, and the pot size question stops mattering because you'll get the same great cup every brew.
Want the full ranked list? See our best drip coffee machines UK roundup and the auto drip machine buying guide.
Sam Roberts writes about coffee machines, beans and brewing gear for Coffee Nerds.
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Last reviewed: August 11, 2026 Β· Evidence-based content Β· Contains affiliate links