We built SquareFeeCalculator.online for one reason — Square’s fee structure is confusing, and the official dashboard doesn’t show you profit or margin before a sale happens. Our tool fills that gap. Enter your sale amount, pick your transaction type (swiped, keyed, online, or invoice), and instantly see the Square fee, your net payout, and your real profit margin. No signup. No fluff. Just math that matches Square’s current 2026 rates.