Liter to oz converter

Multiply liters by 33.814 to get US fluid oz. The factor is the reciprocal of the fluid oz's definition: one US fl oz is exactly 29.5735295625 ml, so one liter (1, 000 ml) contains 1000 ÷ 29.5735 = 33.814 oz. For imperial oz the divisor is 28.4131 ml, which yields 35.195 oz per liter.

A useful mental shortcut: a liter is about 34 US oz, and every quarter-liter is about 8.5 oz. So 0.5 L ≈ 17 oz, 0.75 L ≈ 25 oz, and 3 L ≈ 100 oz. The converter above keeps the exact decimals when the estimate is not enough.

Hydration targets are usually set in liters by health guidance and in oz by American water bottles. The commonly cited adequate daily intake, about 2.7 liters of total fluids for women and 3.7 for men, works out to roughly 91 oz and 125 oz respectively. A 2-liter daily goal is 67.6 oz, or a bit more than two 32 oz shaker bottles.

For single servings: 0.33 L (a European can) is 11.2 oz, 0.5 L is 16.9 oz, the exact size of the standard US disposable water bottle, and 1 L is just under three 12 oz cans.

British and Commonwealth recipes, older cookbooks, and UK product labels use the imperial fluid oz, which is about 4% smaller than the US one. Converting 1 liter with the wrong standard gives 33.8 oz instead of 35.2 oz, a difference of nearly half a cup across a liter. Use the US/UK toggle on the converter whenever your source is British; the chart below uses US oz.