Stock Percentage Gain Calculator
Turn two prices into a percent move, and see why losses hurt more than they look. Enter an old and new price for the percent change, then enter a drawdown to see the gain you'd need just to get back to flat.
Percent change
Percent change = (new − old) ÷ old. The single most-used number in trading — your gain, your loss, or how far a stock has run from a level.
Loss recovery
Losses and gains aren't symmetric. Drop 20% and you need +25% just to get back to flat; a 50% loss needs a 100% gain. It's the math behind cutting losses early — the deeper the hole, the harder the climb out.
How it works
Percent change — (new − old) ÷ old — is the common language of the market: your gain or loss, how far a stock has run off a level, or how big a gap is. Working in percent instead of dollars lets you compare a $3 move on a $20 stock against a $30 move on a $400 one.
The loss-recovery side is the part most traders underestimate. Gains and losses aren't symmetric: a 20% loss needs a 25% gain to break even, a 33% loss needs 50%, and a 50% loss needs a 100% gain. That asymmetry — the math of (loss ÷ (100 − loss)) — is the whole argument for cutting losers early and keeping each loss small.
It's also why StockSetups attaches a stop to every setup. A defined stop caps the drawdown before it reaches the zone where the recovery math turns brutal.
Frequently asked
How do you calculate percentage gain?
Percentage gain = (new price − old price) ÷ old price × 100. A move from $50 to $57 is (57 − 50) ÷ 50 = 14%. A negative result is a percentage loss.
Why does a 50% loss need a 100% gain to recover?
Because the gain is measured against the smaller, post-loss balance. Lose 50% of $100 and you have $50; getting back to $100 from $50 is a 100% gain. The formula is gain needed = loss ÷ (100 − loss).
How much do I need to gain to recover a 20% loss?
About 25%. A 20% drawdown leaves you at 80% of your starting value, and 20 ÷ (100 − 20) = 25%, so you need a 25% gain to get back to break-even.
Let the scan do the math.
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