Quartile Calculator
Q1, median, Q3 and interquartile range using linear interpolation.
Results and explanation
Enter your inputs to get started.
Numbers are processed locally. Results use floating-point arithmetic and up to 10 significant digits. List fields accept commas, spaces or line breaks.
How to use this calculator
This tool sorts values and uses linear interpolation at the 25th, 50th, and 75th percentiles.
Worked example
For 1, 2, 3, 4, and 5, Q1 = 2, median = 3, Q3 = 4, and IQR = 2. Other quartile conventions can differ.
Check the units and assumptions before using your result. Explore related calculators or read our statistics guides.