Fraction & Decimal Converter
Switch between decimals, simplified fractions, mixed numbers, and percentages with smart denominator control, approximation error, and copy-ready results.
We fully support scientific notation (e.g. 1.2e-3), repeating decimals, and negative numbers.
Limit denominator
Tune how simplified the resulting fraction should be. Lower values prefer clean denominators, higher values fit long repeating decimals more closely.
Approximation error: 0.00e+0
Improper fractions are converted to a whole number plus remainder
Original decimal value
Rounded to four decimal places
How this approximation works
We use continued fractions to find the closest rational representation with a denominator capped at 1024. Increase the limit if you are working with long repeating decimals such as 0.3333. Decrease it to prioritise simpler fractions like thirds, eighths, or tenths.