Percent Off Calculator

Worked example

Example: 30% off a $120 item saves $36—you pay $84 before tax and shipping.

When to use this

• Comparing coupon codes at checkout.
• Verifying retailer discount claims.
• Planning Black Friday or clearance purchases.

Common examples

• What is 15% of 200? → 30 (discount or tip on a subtotal).
• 45 is what percent of 180? → 25% (test score or completion rate).
• Price rose from $80 to $100 → 25% percent increase.
• Sale price $89 with 30% off → $62.30 before tax.
• Team finished 18 of 24 tasks → 75% completion for status report.

Common mistakes

• Adding multiple discounts instead of multiplying remaining price.
• Forgetting tax applies after discount in most regions.
• Using post-tax price as the original.

How it works

Supports five percentage modes: find X% of Y, find what percent X is of Y, percent change between two values, increase Y by X%, and decrease Y by X%.

Limitations

Handles common percentage math only. Rounding differences may appear when chaining multiple percentage operations.

Privacy and file handling

Your data stays on your device and is not uploaded.