Calculate percentages online: what is X% of Y, X as a percent of Y, and percentage increase or decrease between two values. Free percentage calculator.
On this page
About this tool
Calculate a percentage of a value, one value as a percentage of another, or percentage change.
How to use Percentage Calculator
Choose the panel that matches your question.
Enter X and Y, or the From and To values.
Read the result and verify that the baseline is the one you intended.
Worked example
A change from 80 to 100 is a 25% increase, while 20% of 100 is 20.
Are percentage change and percentage points the same?
No. A rate moving from 10% to 15% increases by five percentage points but by 50% relative to the original rate.
What if the baseline is zero?
A relative percentage using zero as the denominator is undefined. Choose another way to describe that change.
Explore Math Calculators · More practical guides
Personalize your experience. Open with Ctrl+U (Option+U on Mac). Preferences stay in this browser when storage is available.
Menu language English (USA) Español اردو Accessibility Profiles Custom settings Vision support Reading support Reduced motion Motor support Focus support Oversized widget
Screen Reader Contrast + Smart Contrast Highlight Links Bigger Text Text Spacing Pause Animations Dyslexia Friendly Cursor Tooltips Page Structure Line Height Text Align Dictionary Saturation
Read aloud assistance Uses browser speech voices to read page text or selected text. This is not a replacement for NVDA, VoiceOver or another full screen reader. Available voices and speech processing depend on your browser and device.
Read page Read selection Pause / resume Stop reading
Reset All Accessibility Settings Move / Hide Widget Widget positionBottom right Bottom left Hide widget for 1 hour Restore at any time with Ctrl+U (Option+U on Mac).
Accessibility statement and help