Toolzie

Percentage Calculator

What is X% of Y?

What is % of ?

X is what % of Y?

is what % of ?

% Increase / Decrease

From to ?

X is Y% of What?

is % of what?

How to Use the Percentage Calculator

Choose calculation type. Enter values. Get result instantly. Multiple calculation types.

Percentages constant—discounts, tips, grades, returns. Never memorize formulas.

Frequently Asked Questions

Types?

X% of Y, what% is X of Y, percent change, original before %.

Change?

Enter original and new, gets percent increase/decrease.

Decimals?

Yes, precise results.

Formula?

((New-Original)/Original) × 100.

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About This Tool

The Toolzie Percentage Calculator handles all common percentage problems: find what percent X is of Y, calculate percentage increase or decrease, find the original value before a percentage change, and more.

How to Use

  1. Select the type of percentage calculation you need.
  2. Enter the known values into the fields.
  3. Click Calculate to see the result instantly.
  4. Use the other modes to solve different percentage problems.

Frequently Asked Questions

How do I find what percentage 25 is of 200?

Select 'What percent is X of Y?', enter 25 for X and 200 for Y. The answer is 12.5%.

How do I calculate a 15% tip on $85?

Enter 85 as the original value and 15 as the percentage. The tip amount is $12.75.

How do I calculate percentage increase?

Select 'Percentage change', enter the original value and the new value — the calculator shows the percentage increase or decrease.

How do I find the original price before a discount?

Select 'Original value from percentage', enter the final value and the percentage off to find the original price.