Hi, I'm Lance, and I created the Sales Tax Reverse Calculator to allow users to calculate how much they really paid for a purchase based on their receipt. The NY Sales Tax Calculator allows you to enter your total, and it will instantly reverse engineer the total into the subtotal before taxes using New York state sales tax rates, which include 8.875% in NYC. Consumers use it to verify purchases, while businesses use it to reconcile expenses. It’s completely free and doesn’t require registration.