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Discount Calculator

ছাড় ক্যালকুলেটর

Find the final price after a discount, how much you save, and the true total when two discounts are stacked.

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Your final price will appear here

Enter the price and the discount, then select Calculate discount.

How a discount is calculated

Final price = original price × (1 − discount ÷ 100)

You save = original price − final price

Worked example

A shirt costs ৳2,500 with 20% off: 2,500 × (1 − 0.20) = ৳2,000. You save ৳500.

Two discounts: why 20% + 10% is not 30%

With an extra discount, the second percentage is taken off the price that is already reduced:

Final price = original × (1 − first ÷ 100) × (1 − extra ÷ 100)

On ৳1,000, 20% off leaves ৳800. An extra 10% off is 10% of ৳800, which is ৳80, so you pay ৳720. You save ৳280, which is 28% of ৳1,000, not 30%.

The total discount is always a little below the two percentages added together. The order doesn’t matter: 10% then 20% gives the same ৳720.

How to use the calculator

  1. Enter the original price in Taka.
  2. Enter the discount percentage, from 0 to 100.
  3. If the offer has a second discount, tick “Add an extra discount” and enter it.
  4. Select Calculate discount to see the final price, the amount saved and the total discount.

Amounts are rounded to the nearest paisa. Whole-Taka amounts are shown without paisa, and other amounts with two decimals.

Frequently asked questions

How do I calculate the price after a discount?

Multiply the price by (1 − discount ÷ 100). For ৳2,500 with 20% off: 2,500 × 0.80 = ৳2,000, so you pay ৳2,000 and save ৳500.

What does “extra discount” mean?

It is a second percentage taken off the price that is already reduced, for example “20% off, plus an extra 10% off”. The calculator applies it to the discounted price, not to the original.

Why are 20% and an extra 10% off not 30% off?

The second 10% is worked out on the lower price. On ৳1,000, 20% off leaves ৳800, and 10% of ৳800 is ৳80, not ৳100. You pay ৳720, so the total discount is 28%.

Does the order of two stacked discounts matter?

No. Each one multiplies the price by a factor, and multiplication gives the same result in either order. 10% then 20% off also leaves ৳720 on ৳1,000.

How are paisa shown?

Amounts are rounded to the nearest paisa. If an amount is a whole number of Taka, it is shown without paisa (৳800); otherwise it is shown with two decimals (৳849.15).

Can I calculate the original price from a sale price?

Not with this calculator. To work backwards, use the “Find the whole” option in the Percentage Calculator: a price after 20% off is 80% of the original.

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