Percentage Calculator

Calculate the most common percentage problems in one place.

This Percentage Calculator is built for everyday calculations such as finding X percent of a number, checking what percent one value is of another, measuring percentage change, and applying a percentage increase or decrease. It is useful for shopping discounts, tax and tip estimates, salary comparisons, pricing analysis, business metrics, and schoolwork.

Instead of working through formulas manually, you can switch between modes and get the main result, the raw difference, the adjusted value, and a short explanation of what happened. That makes the result easier to verify and easier to use in real decision making.

What can this percentage calculator help with?

• Find a percentage of any number
• Work out what percent one value represents of another
• Measure percent change between an old and new value
• Apply a percent increase or decrease to a starting value
• Check discounts, markups, growth, loss, tax, and commission scenarios

How to use it

1. Select the calculation type that matches your task.
2. Enter the values for that mode.
3. Read the result summary, difference, and explanation.
4. Use the example button if you want to test a ready-made scenario.

FAQ

How do you calculate percentage change?

Subtract the old value from the new value, divide the difference by the old value, and multiply by 100.

How is percentage increase different from percentage of a number?

Finding a percentage of a number gives the partial amount only. Percentage increase or decrease uses that amount to produce a new adjusted total.

Who is this tool useful for?

It is helpful for students, shoppers, analysts, business owners, sales teams, freelancers, and anyone handling everyday number comparisons.

If you want a fast percent calculator that covers discounts, growth, ratios, and change analysis without switching tools, this page is designed for that exact use case.