📊

Percentage Calculator

Instantly solve the three most common percentage math problems.

1. Find the Percentage of a Number

What is % of ?

Result: --

2. Find the Percentage Ratio

is what percent of ?

Result: --

3. Percentage Change (Increase/Decrease)

Change from to is what %?

Result: --

How to Use the Percentage Calculator?

Our completely free Percentage Calculator is designed to handle everyday math problems without the hassle of setting up complicated formulas. Here is how to use the three tools:

Find the Percentage: Use the first box when you know the total and the percentage, and you want to find the exact amount. (e.g., Calculating a 20% tip on a $150 bill).
Find the Ratio: Use the second box when you have two numbers and want to know the percentage relationship. (e.g., You scored 30 out of 150 on a test).
Calculate Change: Use the third box to find out how much a value has grown or shrunk in terms of percentage. (e.g., A product's price went from $50 to $75).

Frequently Asked Questions (FAQ)

How do you calculate a percentage manually?

To find the percentage manually, divide the part by the whole amount, and then multiply the result by 100. For example, to find what percentage 30 is of 150: (30 / 150) = 0.2. Then, 0.2 × 100 = 20%.

Is my data tracked or saved?

No. Just like all tools on EverydayTools, this calculator runs locally on your device using client-side JavaScript. No data is sent to our servers, meaning it works instantly and works perfectly even without an internet connection.