How many drinks are left in that bottle? That is a question owners and managers of bars often ask themselves when they're trying to figure out just how much inventory they have. The amount of drink left can be difficult to estimate, but there's an easy trick you can use! In this blog post, we will share the secret behind knowing how many drinks are left in a bottle - without even opening it.

We need to know how many ounces are in some of the most common bottles there are, which they can then use to make calculations. We do this by dividing the volume of the bottle by one ounce (in mL)

*Bottle volume* ÷ 1 oz = *Number of 1-oz servings*

Though there are many different bottle sizes, the 750 mL and 1 L bottles are most commonly used by WISK users. Let’s use the 750 mL bottle as example. Yeah it's math. But we're also going to include a calculator at the end of this article so you can rest easy.

A typical drink usually pours 1-ounce the requested spirit. **A U.S. Fluid Ounce (oz.) equals 29.57 mL**.

Let’s say your client ordered a margarita. Your drink requires 3 ounces of tequila making it 88.71 mL. But how many portions are in that bottle?

750mL ÷ 1 oz => 750 mL ÷ 29.57 mL = **25.36 1-oz portions**

That math suggests there are about 25 1-ounce servings in a 750mL bottle (if you round it down).

If you had a bottle of SAUZA - ANEJO BLACK BARREL, it would cost you $3.99 or $1.33/oz.

A tad expensive for a margarita don't you think? Ideally you want to reduce cocktail costs and increase your menu profitability. WISK can help with that.

**How Many Drinks Are Actually in Different Size Alcohol Bottles?**

Let's say you have another bottle but in a different format: Montezuma Tequila 1L.

1000mL ÷ 1 oz => 1000 mL ÷ 29.57 mL = **33.81 portions of 1-oz**

Your drink costs for 3 oz. would be $0.86 or $0.29/oz.

Now that you know how many 1-oz servings are in each of your bottles, it’s time to dig a little deeper. How many shots is the bar pouring in each drink? Is the shot size of .5 oz, 2.5 oz, or 5 oz? Whatever the size of the pour, it’s easy to translate that so bartenders can estimate how many drinks are left in a bottle.

*Ounces in full bottle* ×* remaining % = **Drinks left in partially full bottle*

Going back to that margarita, say that I use a **1-oz pour** of my tequila, and I have **50% of my 1000ml bottle** of tequila ( I have **50% of** **33.81 1-oz portions** in my bottle):

33.81 servings × 50% = 33.81 × 0.5 = **16.90 1-oz servings left**

But what if your cocktail asks for a different amount of spirits? Then we need to know how many servings of that new pour size exist in that bottle. We can find this by dividing the number of remaining 1-oz pours by the new pour size (in ounces):

*Number of 1-oz servings* ÷ *new pour size in ounces = **Portions of new pour size*

Let’s take a **3-oz pour** as the example. After measuring with your scale, WISK shows you that you have 17.27 1-oz portions of liquor left. I just need to divide that by my 3-oz base pour to figure out how many drinks of the new-sized pour remain:

17.27 1-oz portions ÷ 3 oz = **5.76 3-oz servings**

In this case, I have about **5 full drink pours** left in that liquor bottle.

Using a calculator, it's easy to figure out the number of drinks left in different types of bottles. This helps bartenders better stock their bars before shifts and check what they have properly throughout the week, at which point you can increase your business overall profits.

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