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Home Vegetarian Cooking 101 Cooking Conversions

How Many Ounces Are In A Liter? (+ Conversion Guide!)

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By: Sarah BondUpdated: Mar 29, 2023 3 Comments

This post contains affiliate links.

Everything you need to know about measuring ounces in a liter, from terms and origin to how many ounces are in a liter, and other helpful measurements.

Glass pyrex liter on colorful background.

There are 33.814 fluid ounces in a liter. There are 16.9 fluid ounces in a ½ liter or 0.5 liter bottle.

Why are these numbers not nice and round? Because we’re converting between two systems of measurement! Ounces are an imperial measurement, where liters are a metric measurement.

Since the United States is only one of three nations still using the imperial measurement system and ounces (the other two are Liberia and Myanmar) the conversion of ounces into the metric volume measurement of liters is becoming increasingly important as so many recipes now use metric measurements as does food packaging.

What Is an Ounce?

Ounce comes from the Roman term “uncia.” The uncia was 1/12 of a Roman copper bar used as a tool to measure the length of an inch and the weight of an ounce. Modern ounce weight and volume measurements, however, come from Britain. A fluid ounce is 1/16th of a pint. A dry ounce weighs 1/16 of a pound, or 28.35 grams. A Fluid Ounce is the amount of water that weighs one ounce. Now, strangely the United Kingdom has gone to the metric system, but still measure their beers in pints. A UK pint, however, is 20 ounces. The Brits like their beers large!

What Is a Liter?

The liter was introduced in France in 1795 by the Republican government after overthrowing the monarchy and everything associated with that government, and so began the metric system. In 1901 an international agreement redefined the liter as the space occupied by 1 kg of pure water.

Quick Conversions

While the rest of the world has moved on to the metric system, we still use our pints, quarts, and gallons, so here is a quick conversion chart to assist in metric conversions, but it is important to be able to convert easily between ounces and liters in your cooking, wine making, home brewing, etc.

Fluid Ounces to Liters

Fluid OuncesLitersMilliliters
10.0329.57
20.0659.15
30.0988.72
40.12118.29
60.18177.44
80.24236.59
120.35354.88
160.47473.18
200.59591.47
240.71709.77
320.95946.35
33.8141.001000.00
641.891892.71
962.842839.06
1283.793785.41

Liters to Fluid Ounces

LitersMillilitersFluid Ounces
0.03301.0
0.05501.7
0.11003.4
0.22006.8
0.440013.5
0.550016.9
0.7575025.4
1100033.8
2200067.6
44000135.3
55000169.1
1010000338.1

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  1. Stuart says

    Posted on 9/1 at 9:59 am

    You completely missed the fact that the Imperial ounce (British) is not the same size as the US ounce.

    Reply
  2. Mark Anthony ayala says

    Posted on 9/9 at 2:23 pm

    What would be a good dinner for the family that they would actually sit down to eat together

    Reply
    • Sarah Bond says

      Posted on 9/10 at 12:03 pm

      I have so many I can’t pick! Here are all of my vegetarian dinner recipes šŸ˜€

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