Original Price Calculator

How it works

A sale price is only a fraction of the original, so to reverse it you divide rather than multiply. The price you paid represents everything left after the discount, which is (100% − discount), so dividing by that share recovers the full original:

• sale price — what you actually paid
• discount% — the percent off that was applied

With the defaults, paying $60 after 25% off means $60 is 75% of the original, so $60 ÷ 0.75 = $80.00. The markdown was $20.00, the difference between the original and what you paid.

✓ Every result is checked against independent reference math. See how we test the calculators →

A worked example: $60 paid at 25% off

That $60 you handed over at the register was a sale price, and the tag said 25% off. Work backward and the true sticker was $80.00, so the markdown quietly saved you $20.00 on this one item.

The logic runs in reverse of a normal discount. The $60.00 you paid is what was left after a quarter of the price came off, so it stands for 75% of the original. Scale it back to the full price and you land at $80.00, the number the store started from before the sale.

The size of the cut changes that starting number a lot. Pay the same on a 20% off tag and the original was $75.00, but on a 40% off tag it was $100, a $25 spread depending on how deep the discount ran. Plug in your own price and percent to reveal the real starting figure.

Why work backward at all

• Judge whether a deal is real. If the recovered original looks inflated compared to what the item normally sells for, the discount may be less generous than the tag suggests.
• Set a resale or reference price. Knowing the pre-sale price helps when listing an item secondhand or comparing it against full-price rivals.
• Rebuild a receipt. When only the final price and the percent off are known, this fills in the original so your records or expense reports add up.

A second example, reversed

The steps are the same whatever the numbers. Suppose you paid $90 after a 40% discount. That $90 is the 60% left once 40% came off, so divide by 0.60: $90 ÷ 0.60 = $150.00 original, a $60 markdown.

Paid $30 after 25% off? That is 75% of the original, so $30 ÷ 0.75 = $40.00.

• Turn the discount into the share you kept. 40% off means you paid 60%, so the divisor is 0.60. Getting that share right is the whole trick.
• Divide, never multiply. Multiplying the price you paid by the discount adds the wrong amount, because the percent was taken from the larger original, not the smaller sale price.
• Sanity-check the gap. The original minus what you paid should look like a believable markdown for that item. If it does not, re-check the percent you entered.

The mistake that undershoots the original

The most common error is treating the percent off as a slice of the price you paid, then adding it back. That lands short every time. A 25% discount is 25% of the higher original, so the $60 you paid is only 75% of it, and 25% of the original is larger than 25% of $60.

• Wrong way: $60 + 25% of $60 = $75. That treats the discount as a slice of the sale price.
• Right way: $60 ÷ 0.75 = $80. That treats the discount as a slice of the original, where it actually came from.
• The bigger the discount, the bigger the error. At 50% off the two methods diverge sharply, so always divide by the share you kept.

Reversing a stacked or flat discount

This tool reverses a single percentage. Real receipts sometimes involve a flat coupon or two stacked discounts, which need a slightly different unwind. Order matters, because you undo the discounts in the reverse of how they were applied.

• Flat dollars off: if you know the sale price and the dollars saved, just add them for the original. No division needed, because the cut was not a percentage.
• Two stacked percents: divide by the share left from the last discount, then by the share left from the first. Undoing 20% then 30% means dividing by 0.70, then by 0.80.
• A percent then a flat coupon: add the coupon back first, then divide by the share the percent left. Reversing the steps in order keeps the math honest.

Using the original for a price adjustment

One practical reason to recover the original is a price-adjustment claim. Many stores refund the difference if an item you bought drops in price within a set window, and some card benefits do the same. To file one you often need the original price you paid, not just the new lower tag.

• Reconstruct a lost figure. If a receipt survives only as a final total and a percent off, this recovers the pre-discount price the store recorded.
• Compare against a later sale. Knowing the original lets you check whether a fresh markdown truly beats what you already paid, or just matches it.
• Keep tax separate. Price adjustments work off the pre-tax price, so reverse the discount on the item price alone before comparing.