Sales Tax Calculator
Calculate sales tax from a subtotal, discount, shipping, one or two tax rates, or extract tax from tax-inclusive prices.
Tax result
Result appears after calculation.
No calculated receipt yet
Pick a receipt scenario or enter custom amounts, then calculate to see tax, total, and the API response summary.
Posts subtotal, tax rates, discount, shipping, and inclusive mode.
Shows subtotal, tax amount, total, and the split-tax details.
API errors are returned in place without changing the route.
Discount Calculator
Calculate discount savings, tax, and final price from an original amount.
openLoan Payment Calculator
Estimate monthly loan payments, total interest, and payoff timing.
openPay Decay Calculator
Choose your country to automatically load its yearly inflation rates and measure their effect on your pay.
openSavings Goal Calculator
Estimate how long it takes to reach a savings target.
open