Percentage Calculator
Handle the most common percentage tasks in one place: A as % of B, percentage change, discounted price, VAT, and original price recovery.
Quick calculation
Choose a mode, enter two values, and get the result right away. You can also load an example first.
Enter values first, or load one of the examples.
Three practical uses
- E-commerce and retail: calculate the discounted price first, then add VAT so the quote stays consistent.
- Operations and marketing: compare this week against last week with a quick percentage change.
- Reports and slides: turn part-to-whole numbers into readable metrics quickly.
Percentage Calculator FAQ
Which value is used as the base for percentage change?
The original value is the denominator, so the formula is (new - original) / original.
Is it easy to mix up discounts and VAT?
Yes. The safer order is to calculate the discounted price first, then apply VAT.
How do I work back to the original price?
If you know the sale price and the discount rate, use sale price / (1 - discount rate).
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