Sales tax calculator
Calculate tax and a total from a tax-exclusive subtotal.
Formula
Tax = subtotal × rate / 100; total = subtotal + tax
Sales tax ≈ (100)×(8)÷100 · Total including tax ≈ (100)+(8)
How to use
- Enter the taxable subtotal after discounts.
- Enter the applicable combined tax rate.
- Read tax and total price.
Examples
- 100 plus 8% tax gives 108.
- 80 plus 7.5% tax gives 86.
Frequently asked questions
Does this find my local tax rate?
No. Enter the rate that applies to your purchase.
Are exempt items included?
Leave exempt amounts out of the taxable subtotal.
Why might a receipt differ?
Taxability and per-item rounding rules vary; this tool taxes the subtotal once.
Sources
Updated: