What it is
The gain and loss percentage calculator measures the relative price change or account equity change between a starting value and an ending value, expressing it as a clear percentage.
Why it matters
Percentages normalize performance. Knowing you made $200 sounds good, but whether that represents a 2% gain or a 20% gain completely changes the context of your risk and skill.
It also helps compare different trade sizes on an equal footing.
Why traders use it
Traders use it to quickly evaluate trade returns, portfolio monthly performance, or asset price swings without manual percentage formulas.
How important is it?
It is a simple mathematical helper that ensures accuracy when reviewing performance statistics.
Worked example
With default values: start value is $1,000 and end value is $1,200. The change is $200, which is a 20.00% gain ((1200 - 1000) / 1000 * 100). If the value drops to $800, the change is -20%, and the calculator shows you need a 25% gain to return to start.
Common mistakes
- Confusing percentage gain with absolute monetary profit.
- Forgetting that percentage recoveries require higher relative gains after drawdowns.
Frequently asked questions
How is percentage gain or loss calculated between two prices?
Subtract the starting price from the ending price, divide by the starting price, and multiply by 100: ((End - Start) / Start) * 100.
Why does a 20% loss require a 25% gain to get back to break-even?
Because after a 20% drop from $1,000 to $800, recovering the lost $200 is measured against $800 ($200 / $800 = 25%).
Does this work for crypto, stocks, and trading account balances?
Yes, you can enter either asset prices (such as Bitcoin or stock entry and exit prices) or your starting and ending account equity.
Related trading guides
What Is Drawdown and Why Recovery Gets Harder
See how a trading drawdown is measured, why the gain needed to recover grows faster than the loss, and how to limit deep drawdowns.
Risk-Reward Ratio Explained With Examples
Understand the risk-reward ratio, the win rate you need to break even, and why a good ratio alone does not make a good trade.
This page is for education only and is not financial advice. See our disclaimer.