Cubic Kilometers to US Gallons (km³ to gal)
1 cubic kilometer equals 264,172,052,358 US gallons (rounded).
How to convert cubic kilometers to US gallons
To convert cubic kilometers to US gallons, multiply the number of cubic kilometers by 264,172,052,358. The factor is rounded to 10 significant digits. To go the other way, multiply US gallons by 3.785411784×10⁻¹².
US gallons = cubic kilometers × 264,172,052,358
Example: 10 cubic kilometers = 2,641,720,523,581 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
Cubic Kilometer (km³)
One billion cubic meters (a trillion liters). Used for very large volumes.
Picture a cube one kilometer on every edge: that is a cubic kilometer, equal to 1,000,000,000 cubic meters, or a trillion liters. The same volume is also called a teralitre, a name that follows the liter prefix system. Wikipedia converts it to about 810,713 acre-feet, or 0.2399 cubic mile.
Its scale places it among the largest everyday SI volumes. A cubic hectometer, the cube with 100 meter edges, equals one gigalitre, and a thousand of those make one cubic kilometer, which leaves the unit well above anything handled in tanks or reservoirs of ordinary size. The figure used here is 1,000,000,000,000 liters. Because one cubic mile is about 4.168 cubic kilometers, a figure in km3 is always smaller than the same volume in mi3, by that ratio.
1 cubic kilometer = 1,000,000,000,000 liters (exactly).
Sources: Wikipedia: Cubic metre; Wikipedia: Cubic kilometre
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 cubic kilometers (reverse)
- Cubic kilometers to liters
- Cubic kilometers to milliliters
- Cubic kilometers to US cups
- Cubic kilometers 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.