Percentage Calculator

The universal tool for proportional math and growth analysis.

What is X% of Y? Portion
%
A is what % of B? Ratio
% Change from A to B Growth
Math Quick-Reference
Core Concepts

A percentage is simply a fraction with a denominator of 100. 50% is the same as 0.50 or 1/2.

Common Equivalents
10%1/10 (0.1)
25%1/4 (0.25)
33.3%1/3 (0.33)
75%3/4 (0.75)
Financial Tip

When calculating tips or sales tax, remember that 10% is just moving the decimal point one place to the left. 15% is 10% plus half of that 10%.

Expert Math

Percentages are reversible. X% of Y is always equal to Y% of X. For example, 8% of 50 is the same as 50% of 8 (which is 4). This can often make mental math much easier!

Calcuvo

Calcuvo.com sole focus is to provide fast, comprehensive, convenient, free online calculators in a plethora of areas. Currently, we have around 200 calculators to help you "do the math" quickly in areas such as finance, fitness, health, math, and others, and we are still developing more. Our goal is to become the one-stop, go-to site for people who need to make quick calculations. Additionally, we believe the internet should be a source of free information. Therefore, all of our tools and services are completely free, with no registration required.

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