Liquor calculator for a party bar
Enter the adults who drink cocktails and how many each to see how many bottles to buy. A 750 ml bottle pours about 17 drinks at NIAAA’s standard 1.5 oz of spirits.
Enter your measurements
More options: Cocktail drinkers · Per hour · Mixer …
- Of each spirit
- 4 bottles
- Mixed drinks
- 160 drinks
- Drinks per bottle at this pour
- 16.9
- Mixers
- 5.5 gal
- Mixers in 2-liter bottles
- 11 bottles
100 adults × 40% × 4 drinks (1 + 1 × 3 more hours) = 160 drinks
750 ml ÷ 1.5 oz = 16.9 drinks per bottle → 160 drinks ÷ 16.9 + 10% = 10.4, rounded up per spirit = 12 bottles
- Use a jigger. A free pour is often far more than 1.5 oz, which empties bottles faster and makes stronger drinks than guests expect.
Quick answers for common sizes
| Example | Answer |
|---|---|
| How many bottles of liquor for 100 guests | 9 bottles of 750 ml (3 of each spirit) |
| How many shots in a fifth | about 17 shots of 1.5 oz |
Bottles by bottle size (guests and drinks as above)
| Bottle | Bottles of liquor | Of each spirit | Drinks per bottle at this pour |
|---|---|---|---|
| 750 ml | 12 bottles | 4 bottles | 16.9 |
| 1 L | 9 bottles | 3 bottles | 22.5 |
| 1.75 L | 6 bottles | 2 bottles | 39.4 |
Liquor is the easiest part of a bar to count, because the pour is fixed: NIAAA’s standard drink of distilled spirits is 1.5 fl oz at about 40% alcohol. Divide the bottle by that and you have the drinks in it. The common US bottle sizes — 750 ml, 1 L and 1.75 L — are all federal standards of fill for spirits.
Drinks per bottle
| Bottle | Fluid ounces | Drinks at 1.5 oz | Drinks at 1.25 oz | Drinks at 2 oz |
|---|---|---|---|---|
| 750 ml (“fifth”) | 25.4 | 16.9 | 20.3 | 12.7 |
| 1 L (liter) | 33.8 | 22.5 | 27.1 | 16.9 |
| 1.75 L (“handle”) | 59.2 | 39.4 | 47.3 | 29.6 |
drinks = adult guests × share drinking cocktails × drinks each bottles = drinks ÷ (bottle size ÷ pour) × (1 + extra), split across spirits and rounded up
Worked examples
- How many bottles of liquor for 100 guests — a wedding or party bar with three spirits.
- How many shots in a fifth — and in a liter and a handle.
Stocking the bar
- Fewer spirits, better stocked. Two or three spirits plus beer and wine covers most guests; every extra bottle you open is one more to finish.
- Mixers run out before liquor. Plan about 4 oz of mixer per drink — tonic, club soda, cola, ginger ale, cranberry — and plenty of ice; the ice calculator covers it.
- A signature cocktail made in batches is easier to pour consistently for a crowd than a full bar.
- Unopened bottles keep. Round up, and ask whether the store takes back unopened bottles.
What you’ll need
- Bar jigger (1½ oz / ¾ oz)Budget price
Measured pours make the bottle count match the plan, and keep drinks at a known strength.
See options on Amazon (opens in a new tab) - Plastic party cups (16 oz)Budget price
Guests lose track of their cup, so plan two or three per person. A marker by the stack helps.
See options on Amazon (opens in a new tab)
As an Amazon Associate we earn from qualifying purchases. Links to products are affiliate links — they cost you nothing extra and help keep these calculators free.
Frequently asked questions
How many drinks are in a 750 ml bottle of liquor?
About 17 at a 1.5 oz pour — 750 ml is 25.4 fl oz. NIAAA counts 1.5 fl oz of 40% spirits as one standard drink.
How many shots are in a handle?
A 1.75 L handle holds 59.2 fl oz: about 39 shots of 1.5 oz.
How many bottles of liquor for a party of 50?
If 40% drink cocktails, three each, that is 60 drinks: about four 750 ml bottles with 10% extra — more once they are split across several spirits.
How many bottles of each liquor for a party?
Divide the total by the number of spirits, then adjust for your crowd: more vodka and whiskey for some groups, more tequila for others. The calculator splits evenly and rounds each up.
Related guides
Sources
- NIAAA — What is a standard drink? (opens in a new tab) — One standard drink holds 0.6 fl oz (14 g) of pure alcohol: 12 fl oz of regular beer (about 5%), 5 fl oz of table wine (about 12%), or 1.5 fl oz of distilled spirits (about 40%).
- eCFR 27 CFR 5.203 — Standards of fill for distilled spirits (Cornell LII copy) (opens in a new tab) — Authorized spirits sizes include 750 mL, 1 L and 1.75 L.
- USDA/HHS — Dietary Guidelines for Americans, 2025–2030 (opens in a new tab) — “Limit Alcoholic Beverages”: consume less alcohol for better overall health; pregnant women, people recovering from alcohol use disorder or unable to control how much they drink, and people on interacting medications should avoid alcohol completely. No daily drink numbers are given.
- CDC — Moderate alcohol use (page dated January 14, 2025) (opens in a new tab) — Defines moderate drinking for adults of legal drinking age as two drinks or less in a day for men and one drink or less for women, citing the 2020–2025 Dietary Guidelines.
- NIAAA — Understanding the dangers of alcohol overdose (opens in a new tab) — Blood alcohol can keep rising after drinking stops; coffee, cold showers and walking do not reverse it; if you suspect an overdose, call 911 and do not leave the person alone.