Fraction ↔ Decimal ↔ Percent
Convert fractions and mixed numbers to decimals and percentages, or any decimal to its simplest fraction and the nearest 1/8, 1/16 or 1/32 inch.
Decimal
0.375
Percent
37.5%
Simplest fraction
3/8
Nearest ruler fraction
3/8 (exact)
Fraction to decimal
Divide the top number by the bottom: 3/8 = 3 ÷ 8 = 0.375. For a mixed number such as 2 3/4, add the whole number: 2 + 0.75 = 2.75. Multiply by 100 for a percentage.
Decimal to fraction
The converter finds the simplest fraction that equals the decimal, using continued fractions, so 0.333333 becomes 1/3 rather than 333333/1000000.
For tape measures and drill bits it also rounds to the nearest 1/8, 1/16 or 1/32 inch and tells you how far off that is.
Frequently asked questions
What is 0.625 as a fraction?
5/8.
What is 3/16 as a decimal?
0.1875.
How do I turn a decimal into a fraction of an inch?
Multiply the decimal part by 16 and round: 0.39 × 16 = 6.24 ≈ 6/16, which simplifies to 3/8 inch.
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