Percentage Calculator — math calculators and step-by-step solvers
The Percentage Calculator answers the five most common percentage questions with two values, A and B: what percent A is of B, what A% of B equals, the percentage change from A to B, B plus A% (increase), and B minus A% (discount). Enter the two values, pick the operation, and read the answer instant
Category: Mathematics
About this tool
What Is Percentage Calculator? Percentage Calculator is a browser-based tool for Calculate percentages, increases, decreases easily. This guide explains the result, the calculation or processing method, and correct usage. Calculation or Processing Method The selected operation determines whether the tool finds a percentage, a part from a whole, or the increase/decrease between two values. Formula or method: Part = whole × percentage / 100. Percentage change = (new − original) / original × 100. Further reading: Wikipedia reference . How to Use It Open the tool and choose the required unit, mode, or options. Enter values or paste text into the input fields. Review the result, copy it, or continue with a related tool. Important Notes Use consistent units and verify values before calculating. Incomplete or invalid input can produce an incomplete result. Related Tools Tools that support the same workflow: Basic Calculator — Full-featured basic calculator with history. Discount Calculator — Calculate discounted price and savings amount. Markup Calculator — Calculate markup percentage and selling price from cost. Frequently Asked Questions How does Percentage Calculator work? The selected operation determines whether the tool finds a percentage, a part from a whole, or the increase/decrease between two values. What formula does Percentage Calculator use? Part = whole × percentage / 10