Percent Calculator

Quickly calculate N% of a number, discounted price, markup, tax, percent change, and the difference between two numbers.

For this tool, processing runs locally in your browser and data is not sent to the server.

Percent Calculator helps calculate N% of a number, discounted price, markup, margin, tax, increase, decrease, and percent change between two values. It is useful for shopping, reports, retail, marketing, finance, study, and everyday calculations. All calculations run locally in your browser, and data is not sent to the server.

What it does

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How to use

Choose the mode you need: percent of a number, discount, markup, or percent change.
Enter the number and percent, or two values to compare.
Use quick presets such as 5%, 10%, 15%, 20%, or the slider.
The result updates automatically.
Copy the result, formula, or full calculation.

More about this tool

The Percent Calculator helps you quickly find a percent of a number, a discounted price, a price with markup, tax, increase, decrease, and percent change between two values. It is useful for shopping, reports, retail, marketing, finance, study, and everyday tasks. Enter a number and percent, choose a mode, and the result updates automatically. All calculations run locally in your browser, and your data is not sent to the UtiLab server.

Runs in the browser
Data is not sent to the server
Calculates N% of a number
Calculates discounts and final price
Calculates markup and margin
Shows percent change
Quick percent presets and formula view
No registration required

Frequently Asked Questions

How do I calculate a percent of a number?

Enter the number and percent in "Percent of number" mode. For example, 10% of 1000 = 100.

How do I find what percent one number is of another?

Choose "What percent" mode and enter the part and the whole. Formula: part / whole × 100.

How do I calculate a discounted price?

Choose "Discount" mode, enter the original price and discount percent. The calculator shows the final price and savings.

How do I add a percent to a number?

Choose "Add percent" mode and enter the number and percent. For example, 1000 + 10% = 1100.

How do I subtract a percent from a number?

Choose "Subtract percent" mode and enter the number and percent. For example, 1000 − 10% = 900.

How do I calculate percent change?

Choose "Percent change" mode and enter "Before" and "After". The calculator shows growth or decline in percent.

How is markup different from margin?

Markup is calculated from cost, while margin is calculated from the final price. That is why 30% markup and 30% margin give different results.

Can I use decimal numbers?

Yes. You can enter numbers with a dot or comma, for example 1000.5 or 1000,5.

Is my data sent to the server?

No. All calculations run locally in your browser and are not sent to the UtiLab server.

Do I need to register?

No. The tool works immediately without registration.

More about this tool

Runs in the browser
Data is not sent to the server
Calculates N% of a number
Calculates discounts and final price
Calculates markup and margin
Shows percent change
Quick percent presets and formula view
No registration required

Frequently Asked Questions

How do I calculate a percent of a number?

Enter the number and percent in "Percent of number" mode. For example, 10% of 1000 = 100.

How do I find what percent one number is of another?

Choose "What percent" mode and enter the part and the whole. Formula: part / whole × 100.

How do I calculate a discounted price?

Choose "Discount" mode, enter the original price and discount percent. The calculator shows the final price and savings.

How do I add a percent to a number?

Choose "Add percent" mode and enter the number and percent. For example, 1000 + 10% = 1100.

How do I subtract a percent from a number?

Choose "Subtract percent" mode and enter the number and percent. For example, 1000 − 10% = 900.

How do I calculate percent change?

Choose "Percent change" mode and enter "Before" and "After". The calculator shows growth or decline in percent.

How is markup different from margin?

Markup is calculated from cost, while margin is calculated from the final price. That is why 30% markup and 30% margin give different results.

Can I use decimal numbers?

Yes. You can enter numbers with a dot or comma, for example 1000.5 or 1000,5.

Is my data sent to the server?

No. All calculations run locally in your browser and are not sent to the UtiLab server.

Do I need to register?

No. The tool works immediately without registration.