Percentage Calculator
Calculate percentages easily. Find what % of a number is, calculate % change, percentage increase/decrease, and more.
Quick answer:Three percentage formulas: (1) X% of Y = (X/100)×Y. (2) X is what % of Y = (X/Y)×100. (3) % change = ((New-Old)/Old)×100. Most common use: calculating discounts, tax, tip, exam scores, and salary increments. Enter any two values to find the third.
Azam Sharieff· Finance & Tools Reviewer
Last reviewed:
Math Made Effortless
Percentages dictate our entire adult lives-from calculating the interest rate on a mortgage, figuring out a 20% tip at a restaurant, or determining if a '30% Off' retail sale is actually a good deal.
While the basic formula (part / whole x 100) is taught in elementary school, performing mental gymnastics with large, complex decimal numbers is incredibly frustrating. This utility acts as a translation layer, turning conversational questions like 'What is 14.5% of $3,200?' into instant, accurate answers.
Understanding Growth and Margins
For small business owners and marketers, calculating percentage growth is critical. If your website traffic went from 4,500 visitors to 6,200 visitors, you need to know the exact percentage increase to report to investors.
Our calculator removes the risk of Excel formula errors. It accurately computes 'Percent Change', giving you a crystal-clear understanding of whether your metrics are scaling upward or contracting.