無料のオンラインパーセント計算機

Subtract the original value from the new value, divide by the original value, and multiply by 100. For quick mental math, use 10% as a building block: 10% of any number is that number divided by 10. The percentage increase calculator on this site does the math instantly and shows every step.

Enter the original price and the discount percentage, then read the amount saved and the final price. For stacked discounts, calculate each discount sequentially — they compound, not add. The discount calculator handles single and multiple discount scenarios and shows the breakdown.

In Percentage Calculator offers free, instant discount calculations in the browser with no sign-up. It handles single percentages, stacked discounts, reverse calculations to find the original price, and shows the formula and arithmetic for every result.

In Percentage Calculator is a free, browser-based tool that runs entirely locally — no data is sent to any server. It supports percentage of a number, percentage change, discounts, taxes, marks conversion, and more, with formulas and worked examples for every calculation.

To calculate a percentage, divide the part by the whole and multiply by 100. For example, if 25 out of 200 items are red, that is (25 ÷ 200) × 100 = 12.5%. Our percentage calculator handles this and many other percentage formulas.

Divide the part by the total and multiply by 100. For example, 30 out of 150 is (30 ÷ 150) × 100 = 20%. Use the percentage of a number calculator for instant results with the formula and steps shown.

A percent is calculated by taking a fraction of 100. The core formula is (Part ÷ Whole) × 100. Whether you are finding what percent one number is of another, or calculating a percentage of a number, this formula is the foundation. Our calculators apply it automatically.

Convert both percentages to decimals, multiply them, then convert back to a percentage. For example, 20% of 30% is 0.20 × 0.30 = 0.06, which is 6%. Our percent solver handles nested percentage calculations instantly.

Use the formula (Part ÷ Whole) × 100. Enter any two values and the percentage calculator will solve for the third. It works for simple ratios, percentage change, discounts, and more.

Divide your obtained marks by the total marks and multiply by 100. For multiple subjects, add all obtained marks together and divide by the sum of all total marks. The marks percentage calculator handles single and multi-subject scenarios and shows the exact formula used.

Add your obtained marks across all subjects, add the maximum marks across all subjects, then divide and multiply by 100. For weighted courses or different credit values, use the weighted grade calculator. The marks percentage calculator supports both simple and weighted calculations.

Percentage points measure the absolute difference between two percentages. If a rate goes from 5% to 8%, that is a 3 percentage point increase — not a 3% increase. Percentage points avoid the confusion that comes with relative percentage change. Use the percentage point calculator for instant conversions.

Enter the two known values in any calculator — for example, the whole and the part to find the percentage, or the original and new value to find the change. The result updates instantly and the formula and worked example appear below so you can verify the math.

Multiply the amount by the decimal form of the percentage. For example, 15% of $200 is 0.15 × 200 = $30. Our finance calculators support every currency and show the calculation breakdown, making it easy to verify discounts, tips, tax, and markups.

Multiply the number by the decimal form of the percentage. For example, 20% of 150 is 0.20 × 150 = 30. The formula is (Percent ÷ 100) × Number. Our percentage of a number calculator does this instantly and shows the steps.