Unit converter
Liters to US Fluid Ounces Converter
Convert litres to US fluid ounces when a metric bottle has to match an American serving size. The exact factor is 1 l = 33.814022701843 US fl oz, using the litre as the base volume and the US fluid ounce from `units.ts`. This is useful for large drink bottles, juice cartons, water jugs, punch bowls, and imported beverages where the packaging is metric but the recipe, dispenser, or nutrition comparison is American. It also helps when splitting a 1 litre or 2 litre bottle into US-style portions.
1 liter = 33.814 US fluid ounces
Common liters to US fluid ounces values
| Liters | US fluid ounces |
|---|---|
| 1 l | 33.814 fl oz |
| 2 l | 67.628 fl oz |
| 5 l | 169.07 fl oz |
| 10 l | 338.14 fl oz |
| 20 l | 676.28 fl oz |
| 50 l | 1,690.7 fl oz |
| 100 l | 3,381.4 fl oz |
How to convert
- Take the capacity in litres from the bottle, carton, jug, or batch sheet.
- Multiply that litre figure by 33.814022701843 to express it as US fluid ounces.
- Use the unrounded result for per-serving calculations, especially when comparing nutrition panels.
- If you need the reverse conversion, divide US fluid ounces by 33.814022701843 to return to litres.
- For mental arithmetic, one litre is a bit under 34 US fl oz, so a 2 litre bottle is just under 68 US fl oz.
US fluid ounces = litres * 33.814022701843
A litre is the volume base used here, and a US fluid ounce is 0.0295735295625 litres. Dividing 1 litre by that US fl oz value gives 33.814022701843, so multiplying litres by this number converts the amount to US fluid ounces.
- l
- the starting volume in litres
- 33.814022701843
- US fluid ounces in one litre
Worked example
A 2 litre soft drink bottle is 2 multiplied by 33.814022701843, which gives 67.628045403686 US fl oz. If a party cup is 8 US fl oz, that bottle holds about 8.45 such cups before any foam, ice, or spillage allowance.
Key facts
- A 1 litre carton contains 33.814022701843 US fl oz.
- A 2 litre drink bottle contains 67.628045403686 US fl oz.
- A US cup is 8 US fl oz, so 1 litre is about 4.23 US cups.
- This page uses the US fluid ounce, not the imperial fluid ounce found in older UK measuring charts.
Tips
- For party planning, convert litres to US fl oz before dividing by cup size.
- When comparing juice cartons, convert the whole carton first, then calculate servings from the converted total.
- Keep litre values as decimals rather than changing 1.5 l to 1500 ml unless the rest of your worksheet uses ml.
Frequently asked questions
How many US fluid ounces in 1 litre?+
One litre is 33.814022701843 US fl oz with the factor used by this calculator.
How many US fl oz are in a 1.5 litre bottle?+
A 1.5 litre bottle is 50.7210340527645 US fl oz, so it is a little more than six 8 fl oz servings.
Is a US fl oz larger than a millilitre?+
Yes. One US fl oz is 29.5735295625 ml, so a litre contains just over thirty-three and a half US fluid ounces.
Can I call one litre 34 ounces on packaging?+
For informal serving estimates, 34 US fl oz is close. For a label, recipe card, or nutrition calculation, keep 33.814022701843 until the final rounding step.
Things to watch
- Rounding one litre to 34 US fl oz is fine for a shelf estimate, but it can distort cost-per-ounce figures.
- US fluid ounces are not imperial fluid ounces, so UK gallon-based references need a different conversion.
Sources
- The International System of Units (SI Brochure) · BIPM
- NIST Guide for the Use of the International System of Units, SP 811 · NIST
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.