An eighth is simply one part out of eight equal parts of something. If you slice a pizza into eight identical slices, one slice is “an eighth” of the whole pie.
People use the word every day when they talk about portions. In the kitchen, you might pour an eighth of a cup of milk. At the gym, someone might say they just hit an eighth of their daily goal. In music, an eighth note lasts an eighth of a whole beat. It’s a quick way to say “a small but exact piece.”
Meaning & Usage Examples
• “Cut the cake into eighths so everyone gets an equal piece.”
• “I ran an eighth of a mile to warm up.”
• “Add an eighth of a teaspoon of salt.”
Context / Common Use
You’ll hear “an eighth” most often when people want to divide something fairly or measure small amounts—whether it’s food, distance, time, or even cannabis (where “an eighth” means 3.5 grams). The phrase keeps things short and clear.
How much is an eighth in grams?
For cannabis, an eighth is 3.5 grams. For other items, it’s one-eighth of the total weight.
Is an eighth the same as 12.5 percent?
Yes. One divided by eight equals 0.125, which is 12.5 %.
Can I use “an eighth” for time?
Sure. Musicians talk about an eighth note, and athletes might speak of an eighth of an hour—about 7.5 minutes.
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