Oz to Liter Converter

Common Oz to Liter Conversions

These are the most frequently needed oz to liter values. Whether you're reading a water bottle label, following a metric recipe, or converting liquid ounces for international use, these results cover the most common everyday needs:

• 1 oz to liter: 1 × 0.0296 = 0.0296 L (29.57 mL)
• 8 oz to liter: 8 × 0.0296 = 0.237 L (237 mL)
• 12 oz to liter: 12 × 0.0296 = 0.355 L (355 mL)
• 16 oz to liter: 16 × 0.0296 = 0.473 L (473 mL)
• 16.9 fl oz to liter: 16.9 × 0.0296 = 0.500 L (500 mL)
• 24 oz to liter: 24 × 0.0296 = 0.710 L (710 mL)
• 32 oz to liter: 32 × 0.0296 = 0.946 L (946 mL)
• 40 oz to liter: 40 × 0.0296 = 1.183 L
• 64 oz to liter: 64 × 0.0296 = 1.893 L
• 128 oz to liter: 128 × 0.0296 = 3.785 L (1 gallon)

To convert gallons instead of liters, use our oz to gallon converter. For quart-based conversions, see our oz to quart tool.

Oz to Liter Conversion Chart

This complete oz to liter conversion chart covers single ounces through a full US gallon. Popular water bottle sizes — including 16.9 fl oz (500 mL) and 33.8 fl oz (1 L) — are highlighted for quick reference:

For a mirror of this chart — liters to fluid ounces — see our full guide: Oz to Ml Conversion Chart. For gallon equivalents, see the gallon to oz converter.

How to Convert Ounces to Liters (Formula)

The oz to liter conversion uses one precise multiplication factor. The full formula is:

Step-by-Step Calculation Examples

• 6 oz to liter: 6 × 0.0295735 = 0.1774 L (177 mL)
• 16.9 oz to liter: 16.9 × 0.0295735 = 0.5000 L (500 mL)
• 33.8 fl oz to liter: 33.8 × 0.0295735 = 1.000 L
• 50 oz to liter: 50 × 0.0295735 = 1.479 L
• 100 oz to liter: 100 × 0.0295735 = 2.957 L

Where Does 0.0295735 Come From?

The conversion factor is derived directly from the gallon-to-litre relationship. Since 1 US gallon = 128 fl oz and 1 US gallon = 3.78541 liters, dividing: 3.78541 ÷ 128 = 0.0295735 liters per fl oz. This is the exact, internationally recognised value.

Quick Mental Estimate

For fast mental maths without exact precision, use 0.03 as the multiplier. The result will be within about 1.5% of the exact value — accurate enough for everyday use. Example: 32 oz × 0.03 = 0.96 L (exact: 0.946 L).

How Many Ounces in a Liter

The answer to "how many oz in a liter" or "how many fluid ounces in a liter" is always the same: 1 liter = 33.814 US fluid ounces. This is the standard ratio used on all US product labels that display both units. Here are the most searched variations:

• How many oz in 1 liter? → 33.814 fl oz
• How many fluid ounces in a liter? → 33.814 fl oz
• How many oz in 1.5 liters? → 50.72 fl oz
• How many oz in 2 liters? → 67.63 fl oz
• How many oz in 3 liters? → 101.44 fl oz
• Oz per fluid liter (per fluid)? → 33.814 fl oz per litre

Note that this is the US fluid ounce per litre. The UK imperial fluid ounce is slightly different (1 UK fl oz = 28.4131 mL), so 1 litre equals 35.195 UK imperial fl oz. All values on this page use the US fl oz.

What Is a Fluid Ounce?

A fluid ounce (fl oz) is a unit of liquid volume in the US customary measurement system. It measures space occupied by a liquid — not its weight. This is why it's called a "fluid" ounce: it distinguishes the volume unit from the dry ounce, which measures mass.

One US fluid ounce equals exactly 29.5735 millilitres. It is 1/128th of a US gallon, 1/32nd of a quart, and 1/8th of a cup. The fluid ounce appears on nearly every liquid product sold in the United States — from 12 fl oz soda cans to 128 fl oz (one-gallon) water jugs.

There are two types of fluid ounce in use globally: the US fl oz (29.574 mL) and the UK imperial fl oz (28.413 mL). They differ by about 4%. This page uses the US fl oz throughout.

What Is a Liter?

A liter (L) is the primary unit of liquid volume in the International System of Units (SI) — the globally accepted metric system used by virtually every country in the world. One liter equals exactly 1,000 millilitres (mL) or 1 cubic decimetre (dm³).

The liter is used across science, medicine, food labelling, and everyday commerce worldwide. In the United States, most liquid products show both fl oz and mL/L, for example: "16.9 fl oz (500 mL)" on a standard water bottle, or "128 fl oz (3.79 L)" on a gallon jug.

For the official SI definition of the litre, the National Institute of Standards and Technology (NIST) provides authoritative reference documentation.

Practical Use Cases for Oz to Liter Conversion

Water Bottles and Daily Hydration

The most common reason people convert oz to liter is understanding water bottle sizes. A standard US water bottle is labelled 16.9 fl oz — which is exactly 500 mL (0.5 L). Knowing this ratio makes it easy to count litres consumed per day when using US-labelled bottles. Eight 16.9 fl oz bottles = approximately 4 liters of water.

Cooking with International Recipes

Recipes from the UK, Europe, and Australia measure liquids in millilitres and litres. When a metric recipe calls for 250 mL of milk, that's 8.45 fl oz — just over one US cup. Converting between oz and liters fluently lets you follow any recipe without stopping to look up every measurement.

Comparing Beverage Products

US products list volumes in fl oz; imported products use mL or L. When comparing price-per-unit across brands from different countries, converting to a common unit — either oz or liters — is the only way to make a fair comparison. A 1 L bottle (33.8 fl oz) vs a 32 oz bottle: the liter bottle contains 1.8 fl oz more liquid.

Travel and Airport Security

Airport carry-on liquid limits are set at 100 mL per container in most countries. In US fluid ounces, 100 mL = 3.38 fl oz — just over 3 oz. Knowing this conversion is essential when packing liquids and checking against the 3.4 fl oz / 100 mL TSA rule.

For gallon-scale conversions, see: How Many Oz in a Gallon? | How Many Water Bottles Make a Gallon?

Frequently Asked Questions — Oz to Liter