Calculator
Percentage Calculator
Calculate percentages, percentage increase/decrease, and percentage of values.
Where percentage math actually appears
Discounts, tax estimates, margin calculations, and grade weights all rely on the same few percentage patterns. A calculator is helpful when the mental model is not obvious—like computing “what percent is A of B” versus “A increased by 12% to what new value,” which are different questions.
Use the tool
Clarify the question before you type
Write down whether you are dealing with a simple ratio, a percentage change, or a compound effect over multiple periods. If a loan or tax scenario has caps, special brackets, or rounding rules, a basic calculator will not know those business rules. Use the result as a quick estimate when appropriate.
Not financial advice
Percent results here are only as good as the inputs. They are not a substitute for professional accounting or legal review when money is at stake.