This free calculator is handy for determining sales taxes in the U.S. as well as internationally. There are two tabs in this calculator. The first calculates the tax on a subtotal, and gives you the total including tax. The second tab lets you calculate the taxes from a total price including tax, and gives you the subtotal before tax. Handy for figuring out sales taxes if you sell products with "tax included" - or if you want to "extract" tax amounts and subtotals from grand totals.
Please contact us if you have questions about using this software or if you have suggestions about how we can improve it.
Instructions:
To calculate the total amount and sales taxes from a subtotal:
- Ensure that the "Find Invoice Total" tab is selected.
- "Invoice Subtotal (without taxes $)" - Enter the amount on the bill or invoice before taxes.
- "Sales tax rate (%)" - Enter the total effective tax rate in your area. This includes any state and local taxes that apply.
- Press "Calculate" and you'll see the tax amount as well as the grand total (subtotal + taxes) appear in the fields below.
To calculate the subtotal amount and sales taxes from a grand total:
- Ensure that the "Find Subtotal (before tax)" tab is selected.
- "Invoice Total (with taxes $)" - Enter the amount on the bill or invoice after taxes.
- "Sales tax rate (%)" - Enter the total effective tax rate in your area. This includes any federal and local taxes that apply.
- Press "Calculate" and you'll see the tax amount as well as the subtotal (subtotal - taxes) appear in the fields below.