US Cups to Puncheons (cup to pun)

1 US cup equals 0.000744047619 puncheons (rounded).

1 US cup = 0.000744047619 puncheons

How to convert US cups to puncheons

To convert US cups to puncheons, multiply the number of US cups by 0.000744047619. The factor is rounded to 10 significant digits. To go the other way, multiply puncheons by 1,344.

puncheons = US cups × 0.000744047619

Example: 10 US cups = 0.00744047619 puncheons.

Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.

About these units

US Cup (cup)

US customaryCurrent unit

One sixteenth of a US gallon, 236.588 mL (8 US fluid ounces). The standard US recipe cup.

Cups began as household drinking vessels, not scientific units, which is why they remain the messiest measures in the kitchen. The US customary cup was defined by slicing up the gallon: half a pint, or eight US fluid ounces, about 236.6 milliliters. Unlike the larger units, nobody ever fixed it to a physical vessel, so it exists only as a fraction of the gallon.

The customary cup is not the only American cup. For nutrition labels, US regulation defines a cup as exactly 240 milliliters, a rounder figure that sits slightly above the customary size. Packaged foods therefore list a serving in the legal cup while a measuring cup from the hardware store follows the customary definition. The gap is 3.4 milliliters, which hardly matters for soup but can matter in baking. Cup measures also hide the weight of dry ingredients, since a cup of sifted flour and a cup of packed flour differ substantially, which is why much of the world prefers grams.

1 US cup = 0.2365882365 liters (exactly).

Sources: Wikipedia: Cup (unit); NIST SP 811, Appendix B.8: conversion factors for volume; 21 CFR 101.9: nutrition labeling household measures

Puncheon (pun)

US customaryHistorical unit (no longer in standard use)

84 US gallons (318 L), two tierces. A cask for rum and wine.

Richard III is named as having set the wine puncheon at 84 gallons, a size that works out to about 318 litres (317.97 L as used here) in US wine gallons, or 70 imperial gallons. Wikipedia notes the US puncheon is four thirds of a hogshead, so it also equals two tierces.

Unlike the neat wine figure, the puncheon was a loose term in practice. British usage for beer, wine and spirits placed it anywhere between 70 and 120 imperial gallons, roughly 318 to 546 litres, so a puncheon of rum could be markedly larger than one of wine. Any stated size therefore depends on the trade and the period.

Within the English wine ladder it falls between the 63 gallon hogshead and the 126 gallon butt, a third of a tun. The ratios are exact in US gallons: it equals two tierces and four thirds of a hogshead.

1 puncheon = 317.9745899 liters (approximately).

Sources: Wikipedia: Puncheon (unit); Wikipedia: Tun (unit)

Related conversions

See all volume units.