Quick answer: One US gallon of cider makes sixteen 8 fl oz (237 ml) mugs — enough for about eight guests at a party where it is not the only drink. For 20 guests, buy 2½ gallons (9.5 litres). In the UK and Australia, where cider is alcoholic, pour 250 ml mugs, four to the litre.
One US gallon of cider makes sixteen 8 oz mugs — enough for about eight guests at a party where it is not the only drink. That is the number most people are looking for, and if you are in the United States you can stop reading and go buy two and a half gallons for twenty people.
If you are in the UK or Australia, that sentence just described a drink with no alcohol in it, and it is almost certainly not what you meant.
That is the real problem with mulled cider quantities. Every recipe out there is written for one market and silently assumes its own definition of the word.
The word means different things, and this is not pedantry
In the United States, "apple cider" on a supermarket shelf is unfermented, unfiltered apple juice with no alcohol in it. You can see the convention in the recipes themselves: both The Kitchn and Inspired Taste list the ingredient as "apple cider or unfiltered apple juice" — straight swaps. The alcoholic version gets its own name: hard cider.
In the UK, cider is fermented by law. HMRC's alcoholic products technical guide defines it, under the Finance (No.2) Act 2023, as "a product which is obtained from the fermentation of apple juice or pear juice," requiring at least 35% juice content and an ABV below 8.5%. Australian usage follows the British. The NHS uses 5% to 5.5% ABV in its own cider examples, a fair marker for a mainstream cider.
Scale a UK mulled cider recipe for twenty American guests and you are serving twenty people alcohol they did not know was coming. That is a worse failure than getting the volume wrong, and it is why this page has two charts.
One wrinkle: the US regulator's vocabulary does not match the supermarket's. The TTB defines cider as "wine fermented from apples," taxable at 0.5% ABV and up. Shop labelling and home cooks both go the other way. Go by what is in the jug, not by what the statute calls it.
Version one: US-style, non-alcoholic
The good news is that American recipes agree with each other to an unusual degree.
| Recipe | Cider used | Stated servings | ml per serving |
|---|---|---|---|
| A Couple Cooks | ½ gallon (1,893 ml) | 8 | ~237 ml (8 fl oz) |
| The Kitchn | 1 gallon (3,785 ml) | 16 | ~237 ml (8 fl oz) |
| Inspired Taste | 4 cups (946 ml) | 5 | ~189 ml (6 fl oz stated) |
Two of the three land on exactly one US cup, 8 fl oz. That is a tighter convergence than mulled wine recipes manage, and there is a reason: nobody is diluting the cider. Where every mulled wine recipe adds its own splash of water, juice or brandy, mulled cider is mostly just cider plus spices. What goes in the pot is what comes out.
So the arithmetic is clean. A gallon is 16 mugs. A half gallon is 8. A litre is a little over 4.
For per-person planning, hot drinks pace themselves — a mug that has to cool before the first sip does not get knocked back — so the standard party rule of two drinks in the first hour badly over-buys. The columns below are planning judgments rather than sourced figures, and gallons are rounded up to amounts you can actually buy:
| Guests | Alongside other drinks (2 mugs each) | The main event, ~3 hours (3 mugs each) |
|---|---|---|
| 10 | 20 mugs → 1¼ gal (4.7 L) | 30 mugs → 2 gal (7.6 L) |
| 20 | 40 mugs → 2½ gal (9.5 L) | 60 mugs → 4 gal (15 L) |
| 30 | 60 mugs → 4 gal (15 L) | 90 mugs → 6 gal (23 L) |
| 50 | 100 mugs → 6¼ gal (24 L) | 150 mugs → 9½ gal (36 L) |
Because it is non-alcoholic, the ceiling here is appetite, not sensibility — mulled cider is sweet and filling, and most people tap out at three mugs regardless of how long the party runs.
Version two: UK and Australian, alcoholic
Here you are heating a drink of around 5% ABV, so pour smaller. Planning against a 250 ml mug keeps one serving at a sane strength, and it produces two tidy numbers: using the NHS formula (ABV × ml ÷ 1,000), a 250 ml mug of 5% cider is 1.25 UK units. It is also exactly one Australian standard drink — the ADF puts that at 10 g, or 12.5 ml of pure alcohol, and 250 ml at 5% is 12.5 ml on the nose.
A 1-litre bottle therefore gives you 4 mugs.
| Guests | Welcome drink (1.5 mugs each) | Main drink, ~3 hours (3 mugs each) |
|---|---|---|
| 10 | 15 mugs → 4 L | 30 mugs → 7.5 L |
| 20 | 30 mugs → 7.5 L | 60 mugs → 15 L |
| 30 | 45 mugs → 11.5 L | 90 mugs → 22.5 L |
| 50 | 75 mugs → 19 L | 150 mugs → 37.5 L |
Three mugs is 3.75 UK units, against a weekly low-risk guideline of 14. Australian guidance is tighter — the ADF cites no more than 4 standard drinks in a day — so three mugs is close to a full day's allowance there. Say so when you are ladling, because hot spiced drinks genuinely do not taste like their strength.
Does the alcohol cook off?
Less than people hope, and this is contested ground.
The standard reference is the USDA Table of Nutrient Retention Factors: 85% of alcohol retained when stirred into a hot liquid, 40% after 15 minutes of simmering, 35% after 30 minutes, 25% after an hour, 10% after two. But those factors were measured on cooked dishes, often uncovered and actively stirred — not a lidded pot held below a simmer. Applying them to mulled cider is an extrapolation, not a measurement of this drink.
The practical rule holds either way: keep the pot below 78°C (172°F), the boiling point of ethanol, and never let it boil. You lose far less than the charts imply, and the spices stay sweet instead of turning bitter.
If you are spiking a US batch, do it The Kitchn's way — leave the bourbon beside the pot and let people add their own. The base stays genuinely alcohol-free for drivers, kids and anyone who would rather not, and nobody has to ask.
The pot problem
A 5-litre stockpot or large slow cooker holds about 20 mugs, near enough in either system — one round for twenty people, or an evening for seven.
Above that you are reheating in batches, and cold cider takes 20 to 30 minutes to come back up. Get a second pot rather than planning a second batch; spiced cider left sitting for hours also turns bitter, which is the other argument for two smaller pots.
The short version
A US gallon is 16 mugs; buy two and a half for twenty guests. In the UK or Australia, work in 250 ml pours, four to the litre, and remember each one is a standard drink. Keep it under 78°C. And check which cider your recipe means before you scale it up by ten.
If the cider is only part of the evening, the Christmas party drink quantities guide covers the whole table, and how much alcohol for a party handles the general case.
Next step: work out the rest of the drinks with the party drink calculator — and do the cider separately, because as this page shows, it is not one sum, it is two.