Oz to mL Calculator

Q: How many mL is one shot of liquor?

A standard US shot is 1.5 fluid ounces, which equals about 44.36 mL . Many bars pour 44 mL and call it good. Other sizes you may see: 1 oz pony shot = 29.57 mL 2 oz double = 59.15 mL UK single measure = 25 mL or 35 mL by law

Q: Is a 3.4 oz travel bottle the same as 100 mL?

Yes, close enough. 3.4 US fluid ounces equals 100.55 mL . Airport rules set the real limit at 100 mL, and 3.4 oz is the rounded label used in the United States. Bottles are printed with both numbers so one container works worldwide.

Q: How many ounces is a 500 mL water bottle?

500 mL equals 16.91 US fluid ounces , or 17.6 UK fluid ounces. That is why many bottles are labeled 16.9 fl oz. It is just a 500 mL bottle with US units printed on it.

Q: How many ounces are in a 750 mL bottle of wine?

A 750 mL wine bottle holds 25.36 US fluid ounces (26.4 UK fluid ounces). That is about five 5 oz glasses of wine, or roughly 17 standard 1.5 oz shots if the bottle holds spirits.

Q: How many mL are in a tablespoon and a teaspoon?

In US cooking: 1 tablespoon = 0.5 fl oz = 14.79 mL (usually called 15 mL) 1 teaspoon = 0.167 fl oz = 4.93 mL (usually called 5 mL) Metric spoons are made at exactly 15 mL and 5 mL, so the tiny gap does not matter in most recipes.

Q: How many fluid ounces are in a liter?

One liter equals 33.81 US fluid ounces or 35.20 UK fluid ounces . A liter is 1,000 mL, so divide 1,000 by 29.5735 for US ounces or by 28.4131 for UK ounces.

Q: How many mL is 2 oz of baby formula?

2 US fluid ounces equals 59.15 mL , which bottles usually mark as 60 mL. Other common feeds: 4 oz = 118.3 mL (marked 120 mL) 6 oz = 177.4 mL (marked 180 mL) 8 oz = 236.6 mL (marked 240 mL) Always use the mL marks on the bottle itself for mixing.

Q: How much is 30 mL in ounces?

30 mL equals 1.01 US fluid ounces or 1.06 UK fluid ounces. That is why people say one ounce is "about 30 mL." To convert any mL amount, divide by 29.5735 for US ounces.

Oz To mL Calculator

Updated Sep 8, 2026 By Jehan Wadia

Introduction

This Oz to mL Calculator changes fluid ounces into milliliters in one step. Type a number, pick your ounce type, and the result appears as you type. You can also flip it around and turn mL into fl oz.

There are two kinds of fluid ounces. A US fluid ounce is 29.5735 mL. A UK (Imperial) fluid ounce is 28.4131 mL. That small gap matters when you cook, mix drinks, or measure medicine, so this tool lets you choose the one you need.

You can also show your answer in mL, cL, or L, and set how many decimal places you want. The calculator shows each step of the math, a chart that compares US and UK results, and quick charts for common sizes like 1 oz, 8 oz, 16 oz, and 32 oz. Tap any row in a chart to load that value.

How to use our Oz to mL Calculator

Enter a fluid ounce amount and pick your options, and the calculator shows the same volume in milliliters (or centiliters or liters) with the steps used to get there.

Conversion direction: Choose the "fl oz → mL" tab to change ounces into milliliters. Choose the "mL → fl oz" tab to go the other way.

Ounce standard: Pick "US fl oz" for American recipes and bottles (29.5735 mL). Pick "UK / Imperial fl oz" for British measures (28.4131 mL). Tap the info button if you want a quick note on the difference.

Metric unit: Select mL, cL, or L. This sets the unit for your answer in ounce-to-metric mode, or the unit you type in for metric-to-ounce mode.

Decimal places: Choose 2, 3, 4, or 5 decimals. This sets how many digits show after the decimal point.

Value to convert: Type your number in the input box. It must be zero or more. The answer updates as you type, so you do not need to press anything.

Calculate button: Press it to refresh the result and the step-by-step solution at any time.

Clear All button: Press it to reset the input back to 1 and start again.

Copy Result button: Press it to copy your converted value and unit to the clipboard.

Conversion charts: Click or press Enter on any row in the US or UK table to load that ounce amount straight into the calculator.

Ounces to Milliliters (mL) Conversion

A fluid ounce (fl oz) is a unit of volume used in the United States and the United Kingdom. A milliliter (mL) is a metric unit of volume used in most of the world. Converting fl oz to mL lets you follow recipes, read medicine labels, and measure drinks no matter which system the numbers come in.

The Conversion Formulas

There are two kinds of fluid ounces, and they are not the same size:

US fluid ounce: 1 fl oz = 29.5735 mL
UK (Imperial) fluid ounce: 1 fl oz = 28.4131 mL

To change ounces into milliliters, multiply by the factor:

mL = fl oz × 29.5735 (US) or mL = fl oz × 28.4131 (UK)

To go the other way, divide instead:

fl oz = mL ÷ 29.5735 (US) or fl oz = mL ÷ 28.4131 (UK)

US vs UK Fluid Ounces

The UK ounce is about 3.9% smaller than the US ounce. That gap seems tiny, but it grows with bigger amounts. A US pint holds 16 fl oz (473 mL), while a UK pint holds 20 fl oz (568 mL). Always check which country a recipe or bottle comes from before you measure.

Common Conversions to Remember

1 US fl oz = 29.57 mL
8 US fl oz (1 cup) = 236.6 mL
12 US fl oz (a soda can) = 354.9 mL
16 US fl oz (1 US pint) = 473.2 mL
33.81 US fl oz = 1 liter (1000 mL)

Fluid Ounces vs Weight Ounces

A fluid ounce measures volume, or how much space a liquid takes up. A regular ounce (oz) measures weight. They are different units, so you cannot swap them. Water is close to 1 fl oz per ounce of weight, but oil, honey, and flour are not. For dry items, use a scale instead.

Where You Will Use It

Cooking and baking with recipes from other countries, mixing drinks, measuring liquid medicine doses, packing travel-size bottles for a flight, and reading nutrition labels all use these conversions. Milliliters are more exact for small amounts, which is why medicine is almost always dosed in mL.

Formulas used

US fluid ounces to millilitres

V_{\mathrm{mL}} = V_{\mathrm{fl\,oz\,(US)}} \times 29.5735295625

UK (Imperial) fluid ounces to millilitres

V_{\mathrm{mL}} = V_{\mathrm{fl\,oz\,(UK)}} \times 28.4130625

Millilitres to fluid ounces (reverse)

V_{\mathrm{fl\,oz}} = \frac{V_{\mathrm{mL}}}{f}, \quad f = 29.5735295625\ (\mathrm{US})\ \text{or}\ 28.4130625\ (\mathrm{UK})

General conversion via SI base (litres)

V_{\mathrm{out}} = \frac{V_{\mathrm{in}} \times k_{\mathrm{in}}}{k_{\mathrm{out}}}

Metric unit factors (litres per unit)

k_{\mathrm{L}} = 1,\quad k_{\mathrm{cL}} = 0.01,\quad k_{\mathrm{mL}} = 0.001

Chart comparison values (multiples of the entered value)

Q_i = V \times m_i, \quad m_i \in \{0.5,\ 1,\ 2,\ 4,\ 8\}

Frequently asked questions

How many mL is one shot of liquor?

A standard US shot is 1.5 fluid ounces, which equals about 44.36 mL. Many bars pour 44 mL and call it good.

Other sizes you may see:

1 oz pony shot = 29.57 mL
2 oz double = 59.15 mL
UK single measure = 25 mL or 35 mL by law

Is a 3.4 oz travel bottle the same as 100 mL?

Yes, close enough. 3.4 US fluid ounces equals 100.55 mL. Airport rules set the real limit at 100 mL, and 3.4 oz is the rounded label used in the United States.

Bottles are printed with both numbers so one container works worldwide.

How many ounces is a 500 mL water bottle?

500 mL equals 16.91 US fluid ounces, or 17.6 UK fluid ounces.

That is why many bottles are labeled 16.9 fl oz. It is just a 500 mL bottle with US units printed on it.

How many ounces are in a 750 mL bottle of wine?

A 750 mL wine bottle holds 25.36 US fluid ounces (26.4 UK fluid ounces).

That is about five 5 oz glasses of wine, or roughly 17 standard 1.5 oz shots if the bottle holds spirits.

How many mL are in a tablespoon and a teaspoon?

In US cooking:

1 tablespoon = 0.5 fl oz = 14.79 mL (usually called 15 mL)
1 teaspoon = 0.167 fl oz = 4.93 mL (usually called 5 mL)

Metric spoons are made at exactly 15 mL and 5 mL, so the tiny gap does not matter in most recipes.

How many fluid ounces are in a liter?

One liter equals 33.81 US fluid ounces or 35.20 UK fluid ounces.

A liter is 1,000 mL, so divide 1,000 by 29.5735 for US ounces or by 28.4131 for UK ounces.

Can I just multiply ounces by 30 to get mL?

For cooking, yes. Using 30 instead of 29.5735 is off by only about 1.4%. For 8 oz, you get 240 mL instead of 236.6 mL, which will not ruin a recipe.

Do not round for medicine doses, lab work, or big batches, where the error adds up fast.

Why do some labels say a cup is 240 mL?

A true US cup is 8 fl oz, or 236.6 mL. But US nutrition labels use a rounded "legal cup" of 240 mL to keep the math simple.

The 3.4 mL difference is small, so both numbers work for everyday cooking.

How many mL is 2 oz of baby formula?

2 US fluid ounces equals 59.15 mL, which bottles usually mark as 60 mL.

Other common feeds:

4 oz = 118.3 mL (marked 120 mL)
6 oz = 177.4 mL (marked 180 mL)
8 oz = 236.6 mL (marked 240 mL)

Always use the mL marks on the bottle itself for mixing.

How much is 30 mL in ounces?

30 mL equals 1.01 US fluid ounces or 1.06 UK fluid ounces. That is why people say one ounce is "about 30 mL."

To convert any mL amount, divide by 29.5735 for US ounces.

Why is liquid medicine measured in mL instead of teaspoons?

Kitchen spoons vary a lot in size, so a "teaspoon" of medicine can be too much or too little. Milliliters are exact, so doses are safer.

Use the syringe or cup that came with the medicine, and read the mL marks, not spoon marks.

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