Round-trip estimate · Reviewed 2026-11-03
Crypto bid-ask spread cost calculator
Estimate the cost of buying at an entered ask and selling at an entered bid, including user-entered trading fees on both sides.
Estimate what a buy at the ask followed by a sale at the bid would cost for one entered quantity. Prices and fees are your assumptions; this page does not fetch a live order book.
Enter the four assumptions and calculate.
The estimate applies the same fee rate to the buy notional and sale notional, with fees charged in quote currency. Enter prices from the same market and moment. A real execution can differ because of order-book depth, slippage, fee tier, order type, fee currency, and price movement. This scenario is not a quote.
Compare this quote-only round trip with the exchange cost guide or the repeated-trade cost calculator, which also accepts withdrawal assumptions. For completed transactions, use the P&L worksheet.
Method and sources
Spread cost = (ask − bid) × quantity. Estimated fees = (ask × quantity + bid × quantity) × fee rate. The total round-trip cost adds those amounts. In this simplified model, break-even sale price = ask × (1 + fee rate) ÷ (1 − fee rate). No withdrawal, network, tax, or other charges are included.
Trading fees are separate from the quoted bid-ask difference. Binance’s fee page lists trading rates by product and account level; check the current rate that applies to your own account and market. This calculator does not use Binance rates.
Sources reviewed 2026-11-03. This tool is an arithmetic scenario, not financial advice.
How it works
Enter the quoted bid and ask, the crypto quantity, and the same assumed fee rate for each trade. The estimate compares quote proceeds after a buy and sell round trip.
Good to know
How is the round-trip cost estimated?
The calculator multiplies the ask-minus-bid difference by the quantity, then adds a fee on the buy notional and a fee on the sell notional. It assumes fees are charged in quote currency as a percentage of each trade's quote notional.
Does this use live prices or fees?
No. Enter the bid, ask, and fee rate from the same market and time. Actual quotes and fees can differ by product, account tier, order role, pair, and fee currency.
What is the break-even sell price?
Under this simplified model, the break-even price equals the buy ask multiplied by (1 + fee rate) divided by (1 - fee rate). It covers only the entered two-side fee and quote spread; it excludes price movement, slippage, taxes, and other charges.
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