oz to liters and liters to oz converter
oz to liters: one US fluid ounce is 0.0295735 L, so 64 US fl oz = 1.893 L. Choose US or UK ounces, type fluid ounces and the liters appear as you type, with milliliters and cups underneath; liters to oz works in the same box.
Example: Volume 64 · Direction: oz to liters (fl oz → L) · Fluid ounce: US fluid ounce (29.57 mL) → Answer: 64 US fl oz = 1.893 L. Source: NIST SP 811, Appendix B.8 – US fluid ounce = 29.5735295625 mL, US liquid quart = 0.946352946 L, gallon = 3.785411784 L (exact). Updated: .
How it is calculated
The conversion
liters = fluid ounces × 0.0295735295625 (US), and fluid ounces = liters ÷ 0.0295735295625. The US fluid ounce is exactly 1/128 of a gallon of 3.785411784 L. So 128 US fl oz = 3.785 L for a gallon, 33.8 US fl oz = 0.9996 L and, back again, 1 L = 33.814 US fl oz. Switch to UK ounces for imperial sources: 20 UK fl oz = 0.5683 L, the UK pint.
Bottles and cartons
Labels print both numbers, rounded: a “16.9 fl oz” bottle is the 500 mL bottle (0.4998 L), the 33.8 fl oz bottle is 1 L (0.9996 L, strictly 33.814), and a 2 L bottle holds 67.628 fl oz. A 12 oz can is 0.3549 L, i.e. the 355 mL on the label. A half-gallon carton of 64 oz is 1.893 L.
Daily water targets
The popular “eight glasses of eight ounces” rule adds up to 64 oz, which is 1.893 L. A target of 2 L is 67.628 fl oz, close to the 68 oz often quoted. Neither is a medical prescription, only a handy yardstick. To track intake with a 24 oz bottle (0.7098 L), you need about 2.8 refills for 2 L.
US versus UK ounces
The UK fluid ounce is 28.4130625 mL, about 4 % smaller than the US one, but a UK pint has 20 of them while a US pint has 16. So a UK pint of 20 oz is 0.5683 L, and a US pint of 16 oz is 0.4732 L, 17 % less. Recipes and bottles from the UK use the smaller ounce, so pick UK in the selector for them.
Quick estimate
Multiply ounces by 0.03: 50 oz is about 1.5 L (exact 1.479). From liters, divide by 0.03. For milliliters see oz to ml; for quarts see liters to quarts.
Frequently asked questions
How many liters is 64 oz?
64 US fl oz = 1.893 L in US fluid ounces; in UK ounces it is 1.818 L.
How many ounces are in a liter?
1 L = 33.814 US fl oz. In UK fluid ounces, which are smaller, a liter is 35.195 fl oz.
How do I convert oz to liters?
Multiply US fluid ounces by 0.0295735. For 33.8 oz: 33.8 US fl oz = 0.9996 L.
Is 16 oz half a liter?
Almost: 16 US fl oz = 0.4732 L. The common 16.9 oz bottle is 0.4998 L, i.e. 500 mL.
How many oz is a 2 liter bottle?
2 L = 67.628 US fl oz, which bottle labels round to 67.6 fl oz.
Sources and legal basis
- NIST SP 811, Appendix B.8 – US fluid ounce = 29.5735295625 mL, US liquid quart = 0.946352946 L, gallon = 3.785411784 L (exact)
- UK Weights and Measures Act 1985, Schedule 1 – imperial gallon = 4.54609 L, fluid ounce = 1/160 gallon
As of: · Editorial policy
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