The half dollar and the quarter are two of the most common coins in circulation in the United States. While they may look similar, there are some key differences between the two coins. The most obvious difference between a half dollar and a quarter is size. A half dollar is larger than a quarter, measuring 30.6mm in diameter compared to the quarter’s 24.3mm. The half dollar is also thicker than the quarter, measuring 2.15mm compared to the quarter’s 1.75mm. The half dollar also weighs more than the quarter. A half dollar weighs 11.34 grams, while a quarter weighs 5.67 grams. The value of the coins is also different. A half dollar is worth 50 cents, while a quarter is worth 25 cents. Knowing the difference between a half dollar and a quarter can help you when you’re counting coins or making change. It’s important to be able to recognize the difference between the two coins so you can make sure you’re giving the correct amount of change.