Core concept
A loss rate and its recovery rate are not equal
A 30% loss from 100 leaves a value of 70. Returning from 70 to 100 requires a gain of 30 divided by 70, or about 42.86%.
A loss is measured from the original value, while recovery is measured from the smaller remaining value. That is why -30% and +30% do not cancel each other out.
Recovery comparison
The required recovery rate accelerates as losses grow
Gaining the same percentage as the loss does not restore the original value. The table shows the gain needed to break even at each loss rate.
| Current loss rate | Gain needed to break even |
|---|---|
| -10% | +11.11% |
| -20% | +25.00% |
| -30% | +42.86% |
| -40% | +66.67% |
| -50% | +100.00% |
| -60% | +150.00% |
| -70% | +233.33% |
| -80% | +400.00% |
| -90% | +900.00% |
Target loss example
You can target a smaller loss instead of full break-even
Suppose the average price is KRW 100,000, the current price is KRW 70,000, and the target loss is -10%. The target price is KRW 90,000, which requires a 28.57% gain or a KRW 20,000 price increase.
Current price-based loss
-30.00%
Target loss rate
-10.00%
Required gain
+28.57%
This calculation shows the values required by your assumptions. It does not predict future prices or recommend an investment decision.
Before using the result
A 100% loss is a separate mathematical case
- At a 100% loss, the remaining value is zero, so no finite gain can restore the original value.
- The target loss must match the current price-based loss or be closer to 0%. A 0% target means breaking even at the average price.
- Displayed prices and rates are rounded for readability, and results are not investment recommendations.
Frequently asked questions
How should I enter a loss rate?
In break-even mode, enter the size of the loss without a minus sign. For a current loss of -30%, enter 30; the result will display -30.00%.
Why does the target loss calculation need both average and current prices?
The calculator derives the current price-based loss from those two prices. It uses the average price to find the target price and the current price to find the required gain and price increase.
Why can the result differ from my brokerage loss rate?
This calculator uses only the entered average and current prices. A brokerage may use internal cost basis, fees, taxes, display precision, or a different calculation method.
What happens if I enter a target loss of 0%?
A 0% target means the break-even price based on the entered average. If the loss rate entered in break-even mode differs from the price-based loss in target mode, the required gains will also differ.
Why is there no recovery rate for a 100% loss?
When the remaining value is zero, there is no nonzero base to which a percentage gain can apply. The calculator presents this as a separate mathematical result instead of an error or infinity.
Related tools
Check how an additional purchase changes your average price
Calculate a new average price after buying more, or find the quantity and investment needed to reach a target average.