Amphorae to US Gallons (amphora to gal)
1 amphora equals 6.921307772 US gallons (rounded).
How to convert amphorae to US gallons
To convert amphorae to US gallons, multiply the number of amphorae by 6.921307772. The factor is rounded to 10 significant digits. To go the other way, multiply US gallons by 0.1444813658 (rounded).
US gallons = amphorae × 6.921307772
Example: 10 amphorae = 69.21307772 US gallons.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
Approximate value. Standards for the amphora varied by place and period, so this converter uses the most commonly cited value. Treat results as estimates, not exact figures.
About these units
Amphora (amphora)
The 'amphora quadrantal', defined as one cubic Roman foot (about 26.2 L). The standard Roman liquid measure for wine and oil.
Greek amphoreus, shortened from amphiphoreus, meant carried on both sides, a reference to the two handles of the clay jar that gave the unit its name. The Romans took the word over during the period of Hellenization, and Cato the Younger is the earliest known writer to use it. Amphorae carried wine, olive oil, garum, grain and olives around the Mediterranean, and most stood about 45 cm tall.
As a measure, the Roman amphora is properly the amphora quadrantal, defined as one cubic pes, the Roman foot of roughly 296 mm. Wikipedia's table gives 26.2 L for it, while the text of the same article rounds the cube to about 25.9 L, so the figure used here is 26.2 L and the true value is uncertain by a few percent. It equals 8 congii or 48 sextarii. Another Wikipedia article mentions a wine amphora of about 39 L, which shows that the jar and the legal unit were not always the same size. In modern terms the quadrantal is close to 7 US gallons.
1 amphora = 26.2 liters (approximately).
Sources: Wikipedia: Ancient Roman units of measurement; Wikipedia: Amphora
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 amphorae (reverse)
- Amphorae to liters
- Amphorae to milliliters
- Amphorae to US cups
- Amphorae 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.