Tuns to US Gallons (tun to gal)
1 tun equals 252 US gallons exactly.
How to convert tuns to US gallons
To convert tuns to US gallons, multiply the number of tuns by 252. This factor is exact. To go the other way, multiply US gallons by 0.003968253968 (rounded).
US gallons = tuns × 252
Example: 10 tuns = 2,520 US gallons.
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
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
US Gallon (gal)
Exactly 231 cubic inches or 3.785411784 liters (128 US fluid ounces). About 17% smaller than the imperial gallon.
The US gallon is a survivor of English wine trade. Around 1706, a statute in Queen Anne's reign fixed the wine gallon at exactly 231 cubic inches, settling confusion among the competing gallons for wine, ale and corn. British colonies in North America used that wine gallon, and in 1824 Britain replaced all its gallons with a new imperial one while the United States kept the old measure. It was adopted as the legal US standard in 1836 and is still defined as exactly 231 cubic inches, or 3.785411784 liters.
That makes the US gallon about 17 percent smaller than the imperial gallon, a difference that explains why American and British fuel-economy figures cannot be compared directly. Everyday uses are milk jugs, paint cans and gasoline pumps. One gallon divides evenly into four quarts, eight pints, sixteen cups and 128 fluid ounces. A gallon of water weighs a little over 8 pounds, an easy figure to remember when loading a car with water jugs.
1 US gallon = 3.785411784 liters (exactly).
Sources: Wikipedia: Gallon; NIST SP 811, Appendix B.8: conversion factors for volume
Related conversions
- US gallons to tuns (reverse)
- Tuns to liters
- Tuns to milliliters
- Tuns to US cups
- Tuns to US fluid ounces
- Liters to US gallons
- Milliliters to US gallons
- US cups to US gallons
- US fluid ounces to US gallons
- Cubic meters to US gallons
- Cubic centimeters to US gallons
- US quarts to US gallons
- US pints to US gallons
- US tablespoons to US gallons
- US teaspoons to US gallons
- Metric cups to US gallons
- Metric tablespoons to US gallons
See all volume units.