Position calculator
Stock traders know the line: what decides whether you live or die isn't being right, it's how much you bet each time. That habit carries straight into crypto, and because there are no price limits, it matters more. Decide the most you can lose on this trade first, then back out how much to buy — just four numbers.
For a long the stop sits below entry, for a short above; the direction is read automatically from the two prices.
This is a spot position backed out from a fixed loss per trade, excluding fees, slippage and funding rates, so real execution will differ. With leverage, the capital used is magnified and the liquidation line is calculated separately — don't apply this figure directly. The tool is for educational illustration, not buy or sell advice.
Put the discipline on a real account
Position sizing only counts when you execute it on a real account. If you're opening one, sign up on Binance with our invite code and shave a bit off your fees too. Set the rules first, then place your first order.
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The position logic, carried over from the stock market
Seasoned stock traders control risk mostly not by predicting moves, but by rules: lose at most one to two percent of total capital on any single trade. Keep the losses small and ten wrong calls won't break you; one win covers the earlier losses with room to spare. This logic holds in crypto, and matters more — because here there are no price limits, and a single wick can wipe out anyone without a stop.
This tool turns that rule into concrete numbers. First fix two things: how much you're willing to lose in total (capital × loss %), and the price where you'll admit you're wrong and step out (the stop). Entry minus stop is the risk you take per unit bought; divide the loss amount by it and you get how much to buy. Multiply back by the entry and you have the capital this trade uses. If the capital used exceeds your account, it means the risk you want to take doesn't fit a stop this tight — either widen the stop, or accept the trade shouldn't be this big. That's the nudge it gives you when there's no leverage involved.
We tried a common setup: 10,000 U of capital, willing to lose only 2% per trade, stop placed 5% below entry — and the resulting position was smaller than you'd think. A lot of beginners lose money not because the direction was wrong, but because the order was too heavy — one drawdown and they can't hold on. Enter these few numbers and you'll most likely size lighter than you would by feel, and lighter usually means surviving a few more rounds. Read it alongside the fee calculator and leverage and liquidation, and you've basically got the risk side covered.