Journal

How much bottled water do you need for an event?

Running out of water halfway through a reception is a small disaster; ending the night with twenty spare cases is an expensive one. There is no exact formula, because heat, length, venue and the bar all change how much people drink. What follows is the planning method we suggest to customers ordering for weddings, conferences, galas and corporate events. Treat every number here as a starting estimate to adjust with your caterer and venue, not as a rule.

Start with a baseline per guest

For an indoor event in comfortable temperatures, plan on about one 500 ml bottle per guest for every two hours. That works out to half a bottle per guest per hour. Add one bottle per guest at arrival if water is offered at the door or at registration, since that first bottle tends to go fast.

Multiply guests by hours by 0.5, and you have a baseline. A 100-guest, four-hour indoor event comes to 200 bottles before any adjustment.

Adjust for the conditions

Heat and outdoor space: for a summer event outdoors or in a tent, raise the rate to around 0.75 bottles per guest per hour. In real heat or full sun, go higher.
Physical activity: golf outings, field days and anything with dancing or walking push consumption up. Plan at the outdoor rate even indoors.
Alcohol service: guests tend to alternate drinks with water once the bar opens. Add about a quarter to the hours when the bar is open.
Long seated sessions: at conferences, guests drink steadily but slowly. The baseline rate usually holds, with a bottle at each seat at the start of every session block.
Buffer: add 10 percent to the total. Unopened cases keep, and a short supply is harder to fix on the day.

A planning table for 50, 100 and 250 guests

The table below assumes a four-hour event and rounds up to full cases. The first two columns count 500 ml bottles in cases of 24; the last column counts 750 ml table bottles in cases of 12 for a seated dinner, at about one bottle for every two guests.

Guests	Indoor, 4 hours	Outdoor or warm, 4 hours	Seated dinner, 750 ml
50	110 bottles, 5 cases	165 bottles, 7 cases	28 bottles, 3 cases
100	220 bottles, 10 cases	330 bottles, 14 cases	55 bottles, 5 cases
250	550 bottles, 23 cases	825 bottles, 35 cases	138 bottles, 12 cases

The bottle counts include the 10 percent buffer. If your event runs longer or shorter, scale the bottle count in proportion before rounding to cases.

A worked example: a 100-guest summer wedding

Take a five-hour wedding with an outdoor ceremony and cocktail hour, then an indoor reception with a seated dinner and an open bar.

Ceremony and cocktails, two hours outdoors: 100 guests × 2 hours × 0.75 = 150 bottles of 500 ml.
Dinner, about 90 minutes: one 750 ml table bottle for every two guests = 50 bottles, split between still and sparkling.
Dancing and bar, about 90 minutes: 100 × 1.5 × 0.5, plus a quarter for the bar = about 95 bottles of 500 ml.

With a 10 percent buffer, that is roughly 270 bottles of 500 ml (12 cases of 24) and 55 table bottles of 750 ml (5 cases of 12).

Splitting still and sparkling

Still water does most of the work at almost every event. For daytime events, conferences and anything outdoors, a split of about 80 percent still to 20 percent sparkling is a sensible starting point. At a seated dinner, where sparkling water is poured with food, move closer to 60 percent still and 40 percent sparkling. If you know your crowd, adjust.

Table bottles or grab-and-go

The format matters as much as the quantity. For a seated dinner, 750 ml or 1 L glass bottles set on each table look right beside wine and are poured into glasses; Acqua Panna still with S.Pellegrino sparkling is a classic pairing, and Mountain Valley offers both from one American spring. For receptions, registration desks and outdoor stations, individual 330 ml to 500 ml bottles are easier to hand out and carry.

Check whether your venue allows glass outdoors or near a pool. Where it does not, plastic bottles such as Fiji 500 ml or cans such as Proud Source are practical alternatives. Browse our still and sparkling ranges to compare formats.

Ordering for your event

Orders are processed in three to five business days before they ship by carrier from Hicksville, New York, so order well ahead of the date, and earlier for large quantities. Shipping is calculated by weight, and glass weighs more than plastic or cans, which is worth factoring in for big orders. Planners, caterers and venues can find more on our events page, and request written volume pricing through our wholesale page.

Frequently asked questions

How many bottles of water per person should I plan for a wedding?

As a starting estimate, half a 500 ml bottle per guest per hour indoors and about three quarters outdoors in warm weather, plus table bottles at dinner and a 10 percent buffer. Your caterer's experience with the venue is worth weighing too.

How many cases of water do I need for 100 guests?

For a four-hour indoor event, about 10 cases of 24 bottles. Outdoors in warm weather, about 14 cases. Add table bottles if dinner is served.

Should I serve still or sparkling water at an event?

Both, weighted toward still. Around 80 percent still suits most daytime events; a seated dinner can move toward 60 percent still and 40 percent sparkling.