Percent Decimal Fraction Converter
Convert freely between percentages, decimals and fractions.
Three ways to write a proportion
A proportion can be written as a percentage, a decimal or a fraction — fifty percent, 0.5, one half — and different situations call for different forms. This converts between all three, so you can turn a percentage into the decimal a calculation needs, a decimal into a tidy fraction, or a fraction into a percentage, without juggling the arithmetic.
Enter a value in any form and see the other two.
Which form fits the job
Each form has its moment. Percentages are how people communicate proportions — discounts, statistics, interest. Decimals are what you compute with, since they multiply and add cleanly. Fractions are exact and often clearer for simple ratios, and avoid the rounding that decimals sometimes force, as with a third being 0.333 forever. Being able to move fluidly between them means you can present a figure as a percentage, calculate with it as a decimal, and express it exactly as a fraction, all from the same value.
Common questions
When should I use each form?
Percentages to communicate, decimals to calculate, and fractions for exact simple ratios that decimals would round.
Why is one third awkward as a decimal?
Because it does not terminate — it is 0.333 repeating — so the fraction is exact where the decimal must be rounded.
Is anything uploaded?
No. The conversion happens in your browser.