US Cups to Tuns (cup to tun)
1 US cup equals 0.000248015873 tuns (rounded).
How to convert US cups to tuns
To convert US cups to tuns, multiply the number of US cups by 0.000248015873. The factor is rounded to 10 significant digits. To go the other way, multiply tuns by 4,032.
tuns = US cups × 0.000248015873
Example: 10 US cups = 0.00248015873 tuns.
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)
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
Tun (tun)
252 US gallons (954 L), four hogsheads or two pipes.. A very large wine cask, related to the word 'ton'.
From Old English tunne and Medieval Latin tunna, the tun gave English both a cask and, through its close cousin ton, a way of rating ships by how many tuns of wine they could carry. The spellings were once used interchangeably, and a full tun of wine weighs about one long ton of 2,240 pounds.
Its size drifted. The tun began at 256 wine gallons and was cut to 252 before the fifteenth century, a number divisible by seven and many smaller integers. A customs paper of 1507 gives 240 gallons. The Queen Anne gallon of 231 cubic inches, adopted in 1706, made a tun roughly a cylinder 42 inches across and high, and the 1824 imperial system redefined it as 210 imperial gallons.
The US figure of 252 gallons is about 953.9 litres (953.92 L as used here), while the imperial tun is only about 0.08 percent larger. It tops the English wine ladder: two butts, three puncheons, four hogsheads or six tierces, with the same arithmetic working in either gallon.
1 tun = 953.9237696 liters (approximately).
Sources: Wikipedia: Tun (unit); Wikipedia: Hogshead
Related conversions
- Tuns to US cups (reverse)
- US cups to liters
- US cups to milliliters
- US cups to US gallons
- US cups to US fluid ounces
- US cups to cubic meters
- US cups to cubic centimeters
- US cups to US quarts
- US cups to US pints
- US cups to US tablespoons
- US cups to US teaspoons
- US cups to metric cups
- US cups to metric tablespoons
- Liters to tuns
- Milliliters to tuns
- US gallons to tuns
- US fluid ounces to tuns
See all volume units.