Fluid Ounces to Pints (fl oz to pt)

Common questions

How many fluid ounces are in a pint?

Twenty, in imperial measure, which is what a pint means in the UK and Ireland: 20 fl oz is 1 pint, 10 fl oz is half a pint and 5 fl oz is a quarter. A US pint is 16 US fluid ounces instead, so 8 US fl oz is half of one. The two pints are not interchangeable: an imperial pint is 568.26125 mL against 473.176473 mL for the US pint, about 20 percent more, which is why a pint poured in London is bigger than a pint poured in Boston.

What is 1 fl oz in pints?

0.05 imperial pints, a twentieth of one. The amounts asked for next most often, all in imperial: 2 fl oz is 0.1 pt, 4 fl oz is 0.2 pt, 8 fl oz is 0.4 pt, 12 fl oz is 0.6 pt, 16 fl oz is 0.8 pt, 25 fl oz is 1.25 pt and 40 fl oz is 2 pt. Type any of them into the From box and the headline changes without pressing anything. In US measure 1 fl oz is 0.0625 pints, because the division is by 16 rather than 20. The Copy result button under the stage copies the headline exactly as printed, without the thousands separators, so it pastes straight into a spreadsheet.

Is this the UK pint or the US pint, and can I switch?

It opens on the imperial pair, Fluid ounce (imperial) into Pint (imperial). Both menus carry the US sizes at all times, so choosing Fluid ounce (US) and Pint (US) divides by 16 instead of 20 and nothing else about the page changes. Mixing the two systems gives a real answer as well, and this is where a bar or a recipe usually goes astray: 1 imperial fluid ounce is 0.0600474962752 US pints, and 1 US fluid ounce is 0.0520421365393 imperial pints. The Swap units button between the two boxes turns this page into a pints to fluid ounces converter without reloading it.

How many millilitres is a pint, and how many is a fluid ounce?

An imperial pint is 568.26125 mL and an imperial fluid ounce is 28.4130625 mL, both exact, because the imperial gallon is defined as exactly 4.54609 litres, a pint is an eighth of that gallon and a fluid ounce is a twentieth of the pint. A US pint is 473.176473 mL and a US fluid ounce is 29.5735295625 mL, which come from the US gallon of exactly 231 cubic inches. Millilitres and litres are the first two rows of the list under the answer, so the metric figure is on screen beside the pints for whatever amount you type.

Why is the pint missing from the list under the answer?

Because this converter counts the imperial units as uncommon and keeps them out of that list by default, so the list stays short for the units most people want. The headline at the top is the imperial pint answer regardless, and ticking the switch marked Show 5 more adds the imperial pint, imperial gallon, cubic inch and cubic foot rows underneath it. The Pint (US) row is there from the start, so 16 fl oz reads 0.8 in the headline and 0.960759940404 in that row at the same time.

What is 16 fl oz in pints, and what about 20 fl oz?

16 imperial fluid ounces is 0.8 of an imperial pint, and 20 imperial fluid ounces is exactly 1. The 16 that people usually have in mind comes from a US cup or can, and 16 US fluid ounces is exactly 1 US pint, so pick the US units in both menus for that reading. In millilitres the two sixteens are far apart: 16 imperial fl oz is 454.609 mL and 16 US fl oz is 473.176473 mL.

Can I type half a pint as a fraction?

Not as a fraction. The From box takes digits, one decimal point and an optional minus sign, so a typed 1/2 raises a message saying it is not a number instead of guessing at what you meant. Use the decimal: 0.5 fl oz is 0.025 imperial pints, 2.5 fl oz is 0.125 pt and 7.5 fl oz is 0.375 pt. Thousands separators are the one extra character the field accepts, so 1,000 is read as a thousand. For an awkward fraction, the fraction calculator turns it into a decimal first.

Is a fluid ounce the same as an ounce on the scales?

No, and the converter keeps them apart: fluid ounces live in Volume and the ounce of weight lives in Mass, so it will not turn one into the other. An imperial fluid ounce is 28.4130625 mL of space, while an ounce of weight is 28.349523125 g. They sit so close together because the imperial fluid ounce was originally the volume of an ounce of water, which is why a pint of water weighs almost exactly 20 ounces, while a US pint of water is a little over 16.5 ounces. Turning cups of flour or sugar into grams is a density question instead, and the grams to cups tool answers that one with the density it used printed beside the result.

Does anything I type leave my browser?

No. The conversion is one division against a table of factors that ships with the page, so there is no upload and no account, and it keeps working with no network connection once the page has loaded. The amount you typed and the uncommon-units switch are kept in your own browser so the field is where you left it next time, and the Start over button at the top of the page clears them. The pair belongs to this page, so it opens on imperial fluid ounces into imperial pints even when the main converter remembers a different pair, and it leaves that memory alone.