Number of decimals in results.
Shown after the amount (optional).
To pay:
Number of decimals in results.
Shown after the amount (optional).
Resulting percentage:
Note: your selected operation doesn't match the direction of change. The sign shown reflects the actual change.
Original price:
How do I calculate a discount?
Use the free discount calculator from Cogitans: enter the price and discount percentage to see the final price and savings. After a discount: final price = original price * (1 - rate / 100). After an increase: final price = original price * (1 + rate / 100). Relative change divides the difference between two prices by the original price. Original price: EUR 50. Discount: 20%. The final price is EUR 40, saving EUR 10.
Practical questions
How can I tell which discount is the better deal?
Compare final prices for the same quantity and comparable products. The Cogitans discount calculator gives the price to pay for each offer: EUR 50 with 20% off costs EUR 40; EUR 55 with 30% off costs EUR 38.50. Include any extra charges when comparing the total cost.
How can I work out a price increase?
Compare the new price with the old one using Compute a percentage in the Cogitans calculator. A rise from EUR 80 to EUR 100 adds EUR 20, or 25% of the original price. This helps you compare price changes that start from different amounts.
Are percentages and percentage points the same?
No. A rate rising from 20% to 25% gains 5 percentage points. Compared with the original rate of 20%, that rise is a 25% increase.
A percentage change from zero is undefined. Display rounding can differ from an invoice.
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