Help & support
Frequently Asked Questions
Quick answers to common questions about the Discount calculator.
What is 20% off $100?
The savings are $20 and the sale price before tax is $80.
Is tax calculated before or after the discount?
This tool calculates tax from the discounted price. Local tax rules can differ.
Do 20% off and 10% off equal 30% off?
No. Applied successively, they produce a 28% total discount because the second discount uses the reduced price.
Can a discount exceed 100%?
No. The calculator accepts discount rates from 0% through 100%.