The Arbitrage Calculator turns a spread into a concrete profit number for your position size. Enter the trade details and it applies the real exchange fees to tell you what you actually keep — before you commit capital.

• Spread — the gross percentage gap you see on the scanner.
• Buy / Sell exchange — the two venues (their fees are pulled from the Fees table).
• Type — spot or futures (fees differ).
• Amount — your position size in USD.

• Net spread — the gap that survives after both exchanges' fees.
• Net profit — the actual dollars you keep on the amount you entered.

If Net profit is negative, the fees outweigh the spread at that size — increase the edge or skip it.

• Sanity-check any spread before trading it — a 1% gross gap can be near-zero after fees on small size.
• Compare venues: the same spread nets differently depending on each exchange's fee tier.
• Use it to find your minimum viable size where profit clears the fixed transfer costs.