MR. BLINDBANDIT / EVERYDAY UTILITIES
Percentage calculator
Calculate a percentage, a percentage change, or a sale discount.
Use the tool
This tool runs on your device. Information entered here is not submitted to Blindbandit Records.
More practical resources
Use these utilities for planning and everyday calculations, then explore the artist and label resources when you are ready.
Browse all resources ↗About this tool
The percentage calculator answers the three percentage questions people ask most: what is X percent of a number, how much did a value change in percent, and what is the price after a discount.
How to use it
- Choose the type of calculation from the Calculation list.
- For “Percentage of a number”, enter the percentage first and the number second. For example, 20 and 150 gives 20% of 150 = 30.
- For “Percentage change”, enter the old value first and the new value second. The result shows the change as a positive or negative percentage.
- For “Price after discount”, enter the original price first and the discount percentage second.
- Choose Run tool to see the answer.
Screen-reader and keyboard tips
Results appear in a live region, so VoiceOver, NVDA, JAWS and TalkBack read the answer as soon as it is ready without moving your focus. Press Tab to move between fields and Shift+Tab to go back. On an iPhone or iPad, swipe right with one finger to move through the form and double-tap to activate a button.
- The Calculation list is a standard select menu. On a Mac with VoiceOver, press Control-Option-Space to open it; on Windows screen readers, use the Up and Down arrow keys.
- The result repeats the question in words, such as “20% of 150 = 30”, so you can confirm the values you entered.
Ways people use it
- Checking a sale price before buying.
- Working out how much a streaming count or follower number grew from one month to the next.
- Calculating a songwriter’s or producer’s percentage of a fee.
Questions and answers
Why does percentage change say it cannot start from zero?
A change from zero has no defined percentage, because any increase from nothing is infinitely large in percentage terms.
Can I use decimals?
Yes. Both fields accept decimal values, such as 7.5 percent.
Privacy
All calculations run on your device. Values are not saved or submitted. Read the Privacy Policy for details.
These tools were made by Mr. Blindbandit, a blind musician and screen-reader user, so they are designed to work with a keyboard and screen reader first. Found a problem or have an idea? Email business@mrblindbandit.net or browse all tools.