Decimal to fraction conversion is the process of expressing a decimal number as a ratio of two integers (a fraction). Every terminating decimal can be converted to an exact fraction, while repeating decimals can also be expressed as fractions using algebraic methods. For example, 0.75 equals 3/4, and 0.333... (repeating) equals 1/3.

This conversion is useful in many contexts, including cooking measurements, construction calculations, and mathematical problem-solving where fractions provide more precise or intuitive representations than decimals. Understanding both forms helps in choosing the most appropriate representation for any given situation.

Enter any decimal number (positive, negative, or zero) into the input field. The calculator will automatically convert it to a fraction in lowest terms. You can also see the mixed number representation when applicable (e.g., 7/4 = 1 3/4).

For very long decimals or irrational approximations like pi (3.14159...), you can set a maximum denominator to get a practical approximation. For example, limiting the denominator to 100 for pi gives you 22/7, a famous approximation used throughout history.