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Percentage Calculator

100% free — calculate a percentage of a number, percentage change (increase or decrease), tips and discounts. Every answer comes with a clear, step-by-step explanation.

Three simple steps

How to calculate a percentage online

No formulas to memorize. Get the answer and the working out in seconds.

  1. 1

    Choose a calculation

    Pick a tab: percent of a number, X is what percent of Y, percentage change, tip, or discount.

  2. 2

    Enter your numbers

    Type your values into the fields. Everything recalculates instantly as you type.

  3. 3

    Read the result & steps

    See the answer in plain language plus the exact formula used, so you can learn as you go.

Everything you need

Five percentage tools in one calculator

From homework to shopping to restaurant bills — one calculator covers it all.

Percentage of a number

Instantly find what 15% of 200 is, or any percentage of any value.

X is what percent of Y

Turn two numbers into a percentage — perfect for scores, ratios and progress.

Percentage change

Calculate percentage increase or decrease between an old and a new value.

Tip calculator

Work out the tip, the total, and split the bill fairly between any number of people.

Discount calculator

See the sale price and exactly how much you save on any percentage-off deal.

Step-by-step working

Every result shows the formula used, so you understand the math, not just the answer.

The all-in-one percentage calculator

Percentages come up everywhere — a tip at a restaurant, a discount in a sale, a test score, a price rise, or a change in a statistic. This free percentage calculator brings the five most useful percentage calculations together in one place, so you can get an accurate answer in seconds without reaching for a formula or a spreadsheet.

How to calculate a percentage of a number

To find a percentage of a number, multiply the number by the percentage and divide by 100. For example, to work out 15% of 200 you calculate 200 × 15 ÷ 100 = 30. The Percent of tab does this instantly — just enter the percentage and the value.

How to calculate percentage change

Percentage change measures how much a value has gone up or down relative to where it started. Subtract the original value from the new value, divide by the original value, and multiply by 100. A positive answer is a percentage increase and a negative answer is a percentage decrease. This is ideal for price changes, growth rates, and comparing before-and-after numbers.

How to calculate a tip

The tip calculator multiplies your bill by the tip percentage to find the tip amount, adds it to the bill for the total, and divides by the number of people so you know exactly what each person owes. It makes splitting the bill quick and fair, whether you're tipping 15%, 18% or 20%.

How to calculate a discount

The discount calculator shows the sale price and your savings. Enter the original price and the percentage off; it multiplies the price by the discount and divides by 100 to find the saving, then subtracts that from the original price for the final price. It's the fastest way to answer "how much is 25% off?".

Because everything runs on your device, there's nothing to install and nothing is uploaded. Your numbers stay completely private, and the calculator works even when you're offline. This is one of many free browser tools on Uzetool — explore more tools as we add them.

Questions

Frequently asked questions

How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 15% of 200 is 200 × 15 ÷ 100 = 30. In the Percent of tab, enter the percentage and the value and the answer appears instantly.

How do I calculate percentage change?

Subtract the original value from the new value, divide by the original value, then multiply by 100. A positive result is a percentage increase; a negative result is a percentage decrease.

How does the tip calculator work?

Enter the bill amount, tip percentage and number of people. The calculator shows the tip amount, the total including tip, how much each person pays, and the tip per person.

How do I calculate a discount or sale price?

Enter the original price and the discount percentage. The calculator finds your saving (price × discount ÷ 100) and subtracts it from the original price to show the final sale price.

Is the percentage calculator free?

Yes — it's 100% free with no sign-up, watermarks, or usage limits. The tool is supported by unobtrusive ads so it can stay completely free to use.