Percentage Calculator
Calculate percentage amounts, increases, decreases, discounts, markups, and comparisons for shopping, finance, and work.
Common percentage questions
Percentages come up in discounts, sales tax, price increases, grade changes, growth rates, commissions, margins, and comparison reports.
Avoiding mistakes
A percentage point change is different from a percent change. Moving from 5 percent to 6 percent is a one percentage point increase, but a 20 percent relative increase.
Practical examples
Use the calculator to find 15 percent of a bill, compare old and new prices, calculate a markdown, or estimate markup from cost to sale price.
Decision note
Percent math can clarify a number, but the right decision may also depend on timing, fees, taxes, quality, and risk.
How to use it
- Choose the percentage calculation you need.
- Enter the base numbers.
- Review the result and the wording so you know what the percentage represents.
Related tools
Browse the complete free tools directory for calculators, PDF tools, writing utilities, and business helpers.