The answer for 100 guests
For a five-hour reception with 100 guests, plan for about 500 drink servings. That splits into roughly 40 bottles of wine, 175 beers, 125 spirit measures and 150 soft drinks.
Those numbers come from one formula, and it is worth knowing it rather than the answer, because your reception is probably not exactly five hours.
Total servings = guests × hours × 1.0
Wine 40% (5 glasses per 750ml bottle) · beer 35% · spirits 25% · soft drinks a further 30% of the total.
The 1.0 per guest per hour is a working average across the whole reception, not a prediction of any one hour. Real consumption is front loaded: guests drink roughly twice the average in the first hour after the ceremony, and well under it during the meal and the speeches. Averaging is fine for ordering; it is not fine for staffing the bar, which needs to be heaviest at the start.
By guest count and reception length
| Guests | Total servings | Wine bottles | Beers | Spirit measures | Soft drinks |
|---|---|---|---|---|---|
| 50 | 250 | 20 | 88 | 62 | 75 |
| 75 | 375 | 30 | 131 | 94 | 112 |
| 100 | 500 | 40 | 175 | 125 | 150 |
| 125 | 625 | 50 | 219 | 156 | 188 |
| 150 | 750 | 60 | 262 | 188 | 225 |
| 200 | 1,000 | 80 | 350 | 250 | 300 |
Five-hour reception at 1.0 servings per guest per hour.
| Reception length | 100 guests, total servings | Wine bottles | Beers | Spirit measures |
|---|---|---|---|---|
| 3 hours | 300 | 24 | 105 | 75 |
| 4 hours | 400 | 32 | 140 | 100 |
| 5 hours | 500 | 40 | 175 | 125 |
| 6 hours | 600 | 48 | 210 | 150 |
| 7 hours | 700 | 56 | 245 | 175 |
The adjustments that actually matter
| Situation | Adjust by | Why |
|---|---|---|
| Hot weather, outdoor reception | +20% soft drinks and water, +10% beer | People drink more and drink lighter; water demand roughly doubles above 25°C |
| Winter, indoor, evening | −10% beer, +10% spirits and wine | The mix shifts even when the volume does not |
| Older guest list | +wine, −spirits | Consumption rises with age but the mix moves towards wine |
| Lots of guests driving home | +30% soft drinks | A rural venue with no taxis changes the mix more than the total |
| Free bar | +15–25% overall | The single largest variable on this page |
| Cash bar after the toast | −30% from the point it starts | Consumption drops sharply and predictably |
| Signature cocktail on arrival | Count 1 per guest, then −that from spirits | It is a serving, not an extra |
| Children and non-drinkers | Subtract from the alcohol count, not the total | They still need three or four soft drinks each |
How much to actually buy
If you are supplying the drinks yourself, buy the wine and beer on sale or return where the retailer offers it, and buy spirits outright. Wine and beer are where over-ordering is expensive and returnable; spirits keep, and a bottle of gin is not a crisis.
Two conversions worth having: a 750ml bottle of wine is 5 standard 175ml glasses or 6 smaller 125ml pours, and a 700ml bottle of spirits is 28 single 25ml measures. For 100 guests over five hours that means 40 bottles of wine and about 5 bottles of spirits.
Check corkage before any of this. A venue charging £15 a bottle corkage on 40 bottles is adding £600, which frequently wipes out the saving from supplying your own.
Run it for your own numbers
Change the guest count and reception length and the estimator uses exactly the formula above.
Common questions
How many drinks do you need for 100 wedding guests?
About 500 servings for a five-hour reception, which is roughly 40 bottles of wine, 175 beers, 125 spirit measures and 150 soft drinks. The formula is guests × hours × 1.0, then split 40% wine, 35% beer, 25% spirits, with soft drinks a further 30% on top.
How many bottles of wine for 100 guests?
Around 40 for a five-hour reception. Wine takes about 40% of total servings, so 100 guests × 5 hours × 1.0 = 500 servings, of which 200 are wine, and a 750ml bottle pours 5 standard glasses.
Is one drink per guest per hour right?
It is a reliable average across the whole reception, but not for any single hour. Guests drink roughly double that in the first hour after the ceremony and much less during the meal. Use it for ordering, and staff the bar heaviest at the start.
How much does a free bar increase consumption?
Typically 15–25% over a cash bar. It is the largest single variable in drinks planning — bigger than weather, guest age or the drink mix.
Do you count children in the drinks estimate?
Take them out of the alcohol count but leave them in the soft drinks count, at three or four servings each. The same applies to designated drivers and non-drinking guests.