How Many Ounces in a Gallon? (128 US, 160 UK)

128 fluid ounces in a US gallon jug

The gallon-to-ounce question trips up everyone at least once, usually while staring at a water jug or a paint can. The answer is simple in America and different everywhere else, and the reason involves medieval wine merchants. Quick Answer: 1 US gallon contains 128 fluid ounces. A UK imperial gallon contains 160 imperial fluid ounces … Read more

How Many Liters in a Gallon? (3.785 US, 4.546 UK)

3.785 liters in a US gallon container

Fuel prices, water jugs, aquariums, paint cans — the gallon-to-liter conversion shows up constantly in a metric world. The catch is that there are two gallons, and mixing them up means a 20% error. Quick Answer: 1 US gallon equals 3.785 liters. 1 UK imperial gallon equals 4.546 liters. US Gallon: 3.785 Liters The US … Read more

How Many Inches in a Foot? (12, and Why)

12 inches in a foot ruler measurement

Twelve is one of the most memorable numbers in measurement, and the foot-inch relationship is the one everyone learns first. But why twelve? The answer stretches back to ancient body-based measuring. Quick Answer: 1 foot equals exactly 12 inches. Why Twelve? Twelve divides evenly by 2, 3, 4, and 6 — far more useful than … Read more

The Complete Guide to Temperature Conversion

Complete guide to temperature conversion - Celsius Fahrenheit Kelvin

Three temperature scales describe the same physical reality — Celsius, Fahrenheit, and Kelvin are just three languages for heat. This guide is written for the switcher: the traveler landing in a Fahrenheit country, the American reading a European recipe, the student meeting Kelvin for the first time. Every formula between the three scales, plus — … Read more