Wine Bottle, Glasses & Event Calculator

Wine for Events Guide

How Many Glasses Per Bottle?

A standard 750ml bottle of wine contains approximately: 5 × 150ml standard glasses (UK restaurant measure). 6 × 125ml glasses (smaller restaurant measure). 4 × 175ml glasses (generous home pour). For Prosecco/champagne flutes (125ml): 6 glasses per bottle. For event planning, use 5 glasses per bottle as a safe standard. If you serve very generous pours or have dedicated wine drinkers, plan for 4 glasses per bottle. One bottle of wine contains approximately 9 UK units of alcohol at a standard 13% ABV, a useful figure to bear in mind when planning quantities against recommended weekly drinking guidelines.

What should I know about Quantities by Event Type?

Dinner party (3 courses, 2-3 hours): approximately ½ bottle per person for moderate drinkers, ¾ bottle for heavier drinkers. Reception (standing, canapes, 2 hours): approximately ½ bottle per person. Wedding (ceremony + full reception, 6-8 hours): 1-1.5 bottles per drinking guest — weddings generate higher consumption due to toasting, long duration, and celebration atmosphere. Casual party (3-4 hours): ½-¾ bottle per drinking guest. Toast only, lasting 10-15 minutes: 1 glass per person, roughly equating to 1 bottle for every 5-6 guests.

What do I need to know about Chilling and Serving Temperature?

Serving temperatures: light red wine (Pinot Noir, Beaujolais): 14-16°C. Full-bodied red (Cabernet, Merlot): 16-18°C — room temperature is fine in UK homes. Light white wine (Sauvignon Blanc, Pinot Grigio): 7-10°C. Full-bodied white (Chardonnay): 10-12°C. Rosé: 8-10°C. Sparkling wine / Champagne: 6-8°C. Chilling guide: fridge (4°C) takes 3 hours to chill a room-temperature bottle. Ice bucket: 20-30 minutes. Freezer: 20 minutes (do not forget!). For a large event: a plastic cool box with ice and water chills bottles faster and more evenly than ice alone, and scales far better than fridge space for a big gathering.

What's the key thing to understand about Budget and Quality?

The sweet spot for quality vs price in UK wine retail (2024): under £7: very mixed quality — you can find decent supermarket own-label. £8-12: significantly better quality — this is where most reliable wines sit. £12-20: noticeably better complexity, more interesting producers. Above £20: diminishing returns for most occasions. For a party: a solid £10-12 bottle will please most guests and cost no more than £120 for 10 bottles. Buying a case (12 bottles) usually gives a 5-10% discount. Supermarket own-label wines at this price point have improved considerably in quality over recent years, often outperforming similarly priced branded alternatives.

What should I know about Standard Bottle Sizes Beyond 750ml?

Beyond the standard 750ml bottle, common sizes scale predictably: a magnum (1.5L) holds exactly 2 standard bottles' worth, giving roughly 10 glasses at 150ml each; a half bottle (375ml) gives about 2.5 glasses; and a jeroboam (3L) holds 4 standard bottles, around 20 glasses. Larger formats are popular for events specifically because they reduce the per-guest cost slightly (less glass and labelling per litre of wine) and, for sparkling wine, because the wine ages more slowly and gently in a larger format due to the lower ratio of oxygen exposure (via the cork) to wine volume — which is why serious champagne collectors often favour magnums over standard bottles for longer-term cellaring, beyond just the practical serving-size benefit at a party.

What do I need to know about Sparkling Wine Serving Sizes?

Sparkling wine is conventionally served in smaller measures than still wine — typically 125ml rather than the 150-175ml standard for still wine — partly tradition and partly because a flute's narrow shape concentrates the bubbles and aroma in a smaller volume more effectively than a larger measure would. This means a standard 750ml bottle of prosecco or champagne yields about 6 servings rather than the 5 you'd get treating it the same as still wine. For a toast-only pour (a small amount just for a celebratory toast rather than a full glass), many caterers calculate as little as 75-100ml per person, meaning one bottle can cover 7-10 toast-only servings — a useful distinction when budgeting champagne specifically for a wedding toast versus wine for the reception meal that follows.

What do I need to know about Leftover Wine Storage After Opening?

Once a bottle of wine is opened, oxygen begins to interact with it, gradually changing its flavour, and how long it stays good for depends heavily on the wine type. Light, high-acid white wines and sparkling wines degrade fastest, generally best drunk within 1-3 days of opening (sparkling wine loses its fizz within a day or so even with a stopper, since carbonation escapes regardless of oxidation), while full-bodied reds with higher tannin content can often last 3-5 days, as tannins act as a natural antioxidant. Fortified wines like port, sherry, and Madeira, having higher alcohol content and often already somewhat oxidised in style, can last considerably longer once opened, sometimes several weeks to a couple of months if refrigerated. Refrigerating opened wine — including reds, despite the common assumption that reds should stay at room temperature — significantly slows oxidation and extends how long it stays enjoyable, even though it should be brought back towards serving temperature before drinking. Re-corking or using a wine stopper to minimise the wine's exposed surface area and air contact helps further, and specialist wine preservation sprays (inert gas systems) can extend drinkable life by displacing oxygen in the bottle, which is useful for anyone regularly opening a bottle without finishing it in one sitting.

Worked Example: Wine for a 40-Guest Reception

A standard 750ml bottle yields about five 150ml glasses (the standard UK large-glass pour) or six smaller 125ml glasses. For a 40-guest event lasting roughly three hours, where each guest has around two to three glasses, that's 80–120 glasses needed in total. At five glasses per bottle, that works out to 16–24 bottles — a planner would typically round up and also factor in a mix of red, white and perhaps sparkling, rather than one single wine for the whole event, plus a small buffer of 1–2 extra bottles to avoid running short. If sparkling wine is served as a welcome drink before the reception begins, it's worth budgeting separately, since standard flutes typically pour smaller (100–125ml) and a 750ml bottle of sparkling wine yields roughly six servings at that size.

What should I know about Standard UK Pub and Restaurant Pour Sizes?

UK licensing law requires pubs, bars and restaurants serving wine by the glass to offer at least one measure of 125ml, 175ml or 250ml, and these sizes must be displayed. This matters for event planning: a venue quoting 'glasses per bottle' may be using a 175ml or 250ml pour rather than the 150ml figure often assumed for home entertaining, which changes the number of bottles needed for the same guest list considerably — at 250ml a serving, the same 40-guest, 2–3 glass event above would need roughly 27–40 bottles rather than 16–24. For guests monitoring intake, it's worth noting that a 175ml glass of 13% ABV wine contains a little over 2 UK alcohol units, so three glasses at that pour size already approaches half of the NHS-recommended weekly limit of 14 units in a single sitting.

What should I know about No- and Low-Alcohol Wine Alternatives?

Low-alcohol wine (typically under 1.2% ABV in the UK) and alcohol-free wine (0.05% ABV or less) have become more widely available in recent years, and event planners are increasingly budgeting for at least one alcohol-free option alongside standard wine, particularly as a growing proportion of adults in the UK report drinking less or not at all. The same bottle-to-glass serving maths used throughout this page applies equally to alcohol-free wine, so working out quantities for a mixed bar of alcoholic and alcohol-free options follows exactly the same per-guest, per-glass logic described above, just split across more than one type of bottle. A reasonable starting assumption for a general mixed guest list is to budget roughly one alcohol-free bottle for every four to six bottles of standard wine, then adjust after the event based on what's left over. Because alcohol-free wine doesn't need to be rationed in the same way for guests who are driving or simply drinking less, it's often worth having it visibly available on the same table as standard wine, rather than offered only on request, since visibility alone measurably increases how often it's chosen at group events.