分数转小数转换器会把 7/12 这样的分数写成小数形式，包括循环数字。输入分子和分母，或输入带分数，就能得到 0.58(3) 这样的精确结果。 The method reduces the fraction, then tracks each remainder during long division. If a remainder appears again, the decimal repeats from that point. The calculation stays on your device.
分数转小数转换器
全程在浏览器中运行，无需上传，无需注册。
Fraction to decimal
Enter a fraction
Use numerator and denominator, or add a whole number for a mixed fraction.
Digits in parentheses repeat forever.
Exact BigInt long division runs in your browser - nothing is uploaded.
什么是分数转小数转换器？
分数转小数转换器会把 7/12 这样的分数写成小数形式，包括循环数字。输入分子和分母，或输入带分数，就能得到 0.58(3) 这样的精确结果。
使用方法
- 1输入分数. Type the numerator and denominator. Use the whole-number field only for a mixed number.
- 2查看小数. The decimal updates live. Parentheses mark the digits that repeat forever.
- 3核对精确分数. The reduced fraction and mixed form remain beside the decimal.
- 4复制结果. Copy the fraction, decimal, and repeat length for notes or calculations.
适用人群
- 学生检查 1/6、5/8 或 7/12 等作业。
- 教师讲解余数重复为什么会产生循环小数。
- 手工和木工把英寸分数转换为小数。
- 任何人都可以一起复制小数和约分后的分数。
常见问题
如何把分数转换成小数？
Divide the numerator by the denominator. Each step multiplies the remainder by 10 to get the next digit. A zero remainder ends the decimal; a repeated remainder starts the repeating part.
括号表示什么？
Parentheses mark the digits that repeat forever. For example, 1/6 is 0.1(6), which means the 6 continues without end.
支持带分数吗？
Yes. Enter the whole number separately from the numerator and denominator. The tool converts it to an improper fraction before dividing.
会使用浮点数吗？
No. It uses BigInt integer arithmetic and remainder tracking, so large fractions stay exact and floating point rounding does not affect the result.
分母为零怎么办？
A denominator of zero is undefined. The tool shows an error and waits until you enter a non-zero denominator.
这个工具免费且私密吗？
Yes. It is free, needs no account, and runs in your browser. The numbers are not uploaded.