分数→小数変換器
分数を小数に変換します。
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Converting Fractions to Decimals
概要
Turning a fraction into a decimal makes numbers easier to compare, enter into calculators, and use in measurements. This tool converts any fraction to its decimal form instantly in your browser, including repeating decimals.
使い方（ステップ）
- 1
Enter the numerator
The top number of the fraction.
- 2
Enter the denominator
The bottom number — what you divide by.
- 3
Read the decimal
The tool divides and shows the decimal result.
仕組み
A fraction is just a division: the numerator divided by the denominator. So 3/4 becomes 3 ÷ 4 = 0.75. Some fractions produce terminating decimals, while others repeat forever (1/3 = 0.333…); the tool shows the result clearly. This is the same operation a calculator performs, presented for any fraction you enter.
こんなときに使う
Converting a measurement fraction into a decimal for a spreadsheet. Comparing two fractions by their decimal values. Checking homework on fraction-to-decimal conversion.
よくある質問
Divide the numerator by the denominator. For example, 5/8 = 5 ÷ 8 = 0.625.