Percentage & Discount Calculator
Calculate percentages, percentage increase or decrease, discounts and sale prices, and what percent one number is of another — instantly and for free.
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Percentage of a number
Find the result of a percentage multiplied by a number, such as 15% of 80.
Percentage increase / decrease
See exactly how much a value has grown or dropped, in percent and in absolute terms.
Discount & sale price
Work out how much you save, the final price, and even add sales tax on top.
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Free Online Percentage & Discount Calculator
The DailyOnWeb percentage calculator solves the most searched percent problems in one tool: find a percentage of a number, calculate percentage increase or decrease, work out a discount and sale price, or figure out what percent one number is of another. It's built for shopping discounts, sales tax, tips, salary raises, exam scores, business markups, budgeting, and everyday percent math — all with instant, accurate results.
How to calculate a percentage
To find a percentage of a number, convert the percent to a decimal and multiply it by the number. For example, 20% of 150 is 0.20 × 150 = 30. To find percentage increase or decrease, subtract the original value from the new value, divide by the original value, then multiply by 100.
How to calculate a discount
To calculate a discount, multiply the original price by the discount percentage to get the amount you save, then subtract that from the original price to get the sale price. For example, a $120 item at 30% off saves you $36, making the final price $84. Add sales tax on top if needed for the true out-the-door total.
Common percentage calculations
- Calculate what a percentage of a number is (percent calculator).
- Find percentage increase or decrease between two values.
- Work out a discount, sale price, and savings amount, with optional sales tax.
- Find what percent one number is of another (reverse percentage calculator).
- Compare test scores, prices, salaries, and values over time.
Häufig gestellte Fragen (FAQs)
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