Fraction to Decimal Calculator
Switch between fractions and decimals in both directions. Enter a numerator and denominator to get the decimal, or enter a decimal to get the simplified fraction.
Turning a fraction into a decimal
A fraction is just a division: the numerator divided by the denominator. So 3/4 is 3 ÷ 4 = 0.75, and 1/8 is 0.125. The calculator also shows the fraction in its simplest form and as a percentage.
Some fractions, like 1/3, produce repeating decimals. The result is shown to several decimal places, which is accurate enough for everyday use.
Turning a decimal into a fraction
Converting the other way means finding the simplest fraction that equals the decimal. The calculator uses a continued-fraction method to find the closest neat fraction — so 0.75 becomes 3/4 and 0.625 becomes 5/8, rather than an ugly fraction over a power of ten.
This is useful for cooking measurements, woodworking, and converting tool or drill sizes between systems.
Frequently asked questions
How do I convert a fraction to a decimal?
Divide the top number by the bottom number. For example, 3/4 = 0.75. Enter the fraction above to see the decimal and percentage.
How do I convert a decimal to a fraction?
Switch the tool to 'Decimal → fraction' and type the decimal. It returns the simplest equivalent fraction.