Exact P&L for leveraged longs and shorts — position size, dollar profit, ROE and taker fees, computed the same way the exchange does it.
Leverage multiplies your position size, not your prediction. A $100 margin at 10x controls a $1,000 position, so a 5% price move becomes a 50% return on your margin — in either direction. Fees are charged on the full position value twice (entry and exit), which is why high leverage makes small scalps surprisingly expensive.
On spot you own the coins, so profit is simply the price change times your quantity. On futures your margin controls a larger position (margin times leverage), so the same price move produces a proportionally larger profit or loss relative to what you actually put up. The dollar P&L formula is identical — only the position size changes.
Live positions also pay funding (exchanged between longs and shorts every 8 hours) and may fill at slightly worse prices than requested (slippage). This calculator covers position P&L and taker fees, which are the two dominant components on most trades.
Return on equity — your net profit divided by the margin you committed, as a percentage. It is the number leaderboards and P&L tickets usually show, because it measures how hard your actual capital worked, not the notional position.
Free, no signup, runs entirely in your browser. Educational tool — not financial advice. Practice the setup risk-free on the MarginPad paper-trading terminal before putting real money behind it.