Trading Calculators
Break-even Calculator
A -50% loss needs a +100% gain. See at a glance the gain required to break even for each loss rate.
Enter your values and press Calculate
Gain needed to break even
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The asymmetry of losses
A −50% loss is not recovered by +50%
The bigger the loss, the more steeply the gain needed to break even grows. That is why your stop-loss rule matters.
Enter the loss rate
Enter your current loss rate or move the slider.
Calculate by price
Enter your average price and the current price to see the recovery price and required gain right away.
Recovery time
Assume an annual return and see how many years it takes to break even.
−10% needs +11.1%, −30% needs +42.9%, −50% needs +100% and −80% needs +400%.
FAQ
Why does recovering a loss need a bigger percentage gain?
Because the gain is calculated on the reduced amount. If KRW 1 million falls to KRW 500,000, it must rise 100% of KRW 500,000 to get back to KRW 1 million.
Does averaging down reduce the gain needed?
When your average price falls, the gain needed to break even shrinks. In exchange, the amount you have invested grows. Check both in the Averaging-down Calculator.
How much are selling costs?
As of 2026, the securities transaction tax (including the Special Tax for Rural Development) on selling Korean stocks is 0.20% for both KOSPI and KOSDAQ, plus brokerage commissions on top.
Results are estimates based on your inputs and simplified assumptions, and are for reference only, not a basis for investment decisions.
Tools that work well together
Averaging-down (Average Price) Calculator
Calculate your new average price after buying more, and how many shares you need to reach a target average price.
Position Sizing Calculator
Calculate the right number of shares for this trade from your acceptable loss relative to your account and your stop-loss price.
Leveraged ETF Negative Compounding Simulator
Simulate for yourself why 2x and 3x leveraged ETFs lose money in a sideways market.