How much could slippage cost me on this trade based on my order size and the bid-ask spread?
Enter Your Order Details
Your Result
Fill in your order size and the bid-ask spread, then click Estimate to see the projected round-trip slippage cost.
How this is calculated
This estimate assumes you cross roughly half the quoted bid-ask spread on entry, and half again on exit, which is a common simplification for a market order or an aggressively priced limit order.
Wider spreads, thinner order books, and fast-moving stocks can all push actual slippage above the quoted spread. Use the extra slippage field to account for that on lower-liquidity names.
This is an estimate, not a live fill price. Your actual fill depends on order type, order book depth at the moment you trade, and market conditions.
Pair this with the Commission Cost Calculator to see your full trading cost picture: commissions and slippage together.
Pair this with the Average Daily Volume Liquidity Calculator before sizing into a position on a lower-volume stock, since order size and slippage move together on thin names.
Risk & liability disclaimer: This calculator produces a mathematical estimate based on the numbers you enter. It is not financial advice and does not guarantee any trading outcome. Trading involves risk of loss, and past results do not predict future performance. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. We do not guarantee this tool is error-free or suitable for your situation. Always verify results independently and consult a licensed professional before making any trading or financial decision. You could lose some or all of the capital you trade with.
Know Your True Cost Before You Click Buy
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