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Fluid Ounces to Pounds Converter

Wondering what a volume in fluid ounces weighs in pounds? Volume becomes weight only once you know the liquid, so pick a substance below.

Fluid Ounces ⇄ Pounds
fl oz
=
lb
Substance:
Result16 fl oz = 1.043 lb (Water)
Quick answer
The old saying "a pint's a pound" is nearly true for water: 16 fluid ounces of it weigh about 1.04 lb. Other liquids break the rule, honey is heavier for the same volume, oil lighter, so the answer depends on what is in the glass. Choose the substance and the tool weighs it correctly.

Conversion table

Fluid ounces (fl oz)Pounds (lb)
1 fl oz0.065
2 fl oz0.13
4 fl oz0.261
8 fl oz0.522
16 fl oz1.043
32 fl oz2.086
64 fl oz4.173
128 fl oz8.345

How to convert fl oz to Pounds

lb = fl oz × (per-ounce weight)water ≈ 0.0652 lb per fl oz · reverse: fl oz = lb ÷ that figure
fl oz
the volume in fluid ounces
lb
what it weighs, in pounds
per-ounce weight
pounds one fluid ounce weighs for the chosen liquid

These are fluid ounces (volume), so weight depends on the liquid. That differs from weight ounces, where 16 oz is a pound by definition, no substance needed.

Frequently asked questions

What does 16 fl oz of water weigh?

About 1.04 lb. A US pint of water is a little heavier than a pound.

Why does the liquid matter for pounds?

Fluid ounces measure space and pounds measure weight. A dense liquid weighs more per ounce, so the substance sets the result.

How many fluid ounces of water make a pound?

Around 15.3 US fluid ounces, since a pound of water is roughly 453.6 mL.

Is a pint really a pound?

For water it is close, hence "a pint's a pound the world around", though a US pint of water is nearer 1.04 lb.

Quick facts
16 fl oz water
≈ 1.04 lb
Honey
heavier per ounce
Oil
lighter per ounce
Measures
Volume to weight