Inches To Fraction Calculator

Math Tool

Inches to Fraction Calculator

Convert decimal inches to the nearest common fraction with selectable precision.

Main Calculator

Enter a decimal inch value.
Fractional Result
No result yet

What the Precision Means

The precision setting picks the nearest allowed denominator before the fraction is reduced to lowest terms.

Worked Example

3.375 in at 1/16 in precision becomes 3 3/8 in.

0.375 x 16 = 6, and 6/16 reduces to 3/8.

How It Works

1. Separate the whole number from the decimal remainder.
2. Multiply the remainder by the selected denominator.
3. Round to the nearest numerator.
4. Reduce the fraction to lowest terms.

Frequently Asked Questions

What if the input is already exact?

Whole numbers are returned unchanged, such as 4.0 in becoming 4 in.

Does it reject negative numbers?

Yes. This calculator is intended for lengths, so negative inputs are rejected explicitly.

Related Tools