Sales Tax Calculator
Calculate sales tax and final totals instantly for invoices, estimates, and checkout totals.
$0.00
Enter amount and tax rate
How sales tax is calculated
If amount excludes tax: tax = amount × rate / 100, total = amount + tax. If amount includes tax: base = amount / (1 + rate / 100), tax = amount - base.
Step 1: Enter pre-tax amount
Add the price before tax to get an accurate base value.
Step 2: Add tax rate
Use your local sales tax percentage for the correct tax amount.
Step 3: Read total
Use the calculated total directly in your invoice or quote.
Sales tax calculator FAQ
Yes. Enter your pre-tax line total and tax rate to get the final invoice total.
Yes. Replace the rate input with any valid percentage.
Yes. The calculator works for quotes, invoices, and checkout totals.
Get started with free invoicing
Use this tax rate in Nexbal and send professional invoices in minutes.