What is a discount calculator?
A discount calculator works out how much a discounted item really costs and how much you save. Give it the original (list) price and the percentage off, and it returns both the final sale price and the dollar amount you keep in your pocket. It is a universal tool that works with any currency — the math is the same whether you are shopping in dollars, euros, or pounds.
How to use it
Enter the original price of the item and the discount percentage being offered (for example, 25 for "25% off"). The calculator instantly shows the sale price you will pay at the register and the amount saved. Use it to compare deals, check a sticker price, or stack a coupon against a marked-down item.
The formula explained
The discount in dollars is simply the price multiplied by the discount fraction: \( \text{Saved} = \text{Price} \times \left( \text{Discount} \div 100 \right) \). Subtract that from the original price and you get the sale price: $$\text{Sale Price} = \text{Price} \times \left(1 - \frac{\text{Discount}}{100}\right)$$ The two are linked — \( \text{Price} = \text{Sale Price} + \text{Saved} \) — so the calculator always stays internally consistent.
Worked example
Suppose a jacket lists for $80 and is marked 25% off. The amount saved is $$80 \times 0.25 = 20$$ The sale price is $$80 - 20 = 60$$ So you pay $60 and save $20.
FAQ
Does this include sales tax? No. It calculates the pre-tax discounted price. Add any applicable tax on top of the sale price afterward.
Can I enter a discount over 100%? The percentage is capped at 100%, which would make the item free. Values above that are not meaningful for a discount.
How do I find the percentage off from two prices? Divide the amount saved by the original price and multiply by 100: \( \left( \text{Price} - \text{Sale Price} \right) \div \text{Price} \times 100 \).
