Percentage calculator
Quick percent math without opening a spreadsheet.
Type any two numbers and read all three percentage answers at once.
このツールの使い方
- Type the two numbers in any of the three blocks.
- Read the three percentage answers below.
- Adjust the inputs to compare scenarios.
- Copy the figure you need.
代表的な用途
- Calculating retail discounts before checkout.
- Checking tax or tip on a bill.
制限と注意点
- Computations use floating-point math; round the final number where appropriate.
- Educational helper only; for legal taxes, confirm with the official source.
Frequently asked questions
How do I calculate X percent of a number?
Multiply the value by X and divide by 100. Example: 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. Example: 25 is 50% of 50 because 25 ÷ 50 × 100 = 50.
How is percent increase or decrease calculated?
Use (final − initial) ÷ initial × 100. A positive result is an increase; negative is a decrease.
このページのプライバシー
製品分析タグ（後から追加する場合）は同意後にのみ読み込むべきです。本サイトに必須の第三者トラッカーはありません。
Use this percentage calculator for shopping discounts, taxes, tips, statistics homework, or any number you want to grow or shrink by a percent. Numbers are not sent to any server.