Sales Tax Calculator
Reserved · Sponsored728 × 90 · zero layout shift
Enter an amount and a tax rate to see the tax owed and the final total — or flip to reverse mode when you already know the tax-included total and need to back out the original pre-tax price and the tax portion. Useful for checking receipts, budgeting purchases, or reconciling invoices where tax rates vary by state, county, or product category.
Use Amount → Total when you have a pre-tax price and want the tax and total. Use Total → Amount when you have a tax-included total and want to find the original price.
Type the pre-tax price (forward mode) or the total actually charged (reverse mode).
Enter the combined sales tax rate as a percentage — state, county, and city rates added together if they apply.
The summary cards show the pre-tax amount, the tax amount, and the total, updating live as you adjust either field.
Enter a cart subtotal and your local rate to see roughly what you'll actually be charged before reaching the register.
Check that the tax amount charged on a receipt matches the stated rate applied to the subtotal.
Given a total invoice amount that includes tax, use reverse mode to split it into the pre-tax expense and the tax line item.
Run the same subtotal through a few different rates to see how much a purchase's final cost shifts between locations.
Combined rates typically add state, county, and sometimes city or special district rates together. Check a recent receipt for the exact percentage charged, or look up your jurisdiction's published rate — it can vary block to block in some areas.
If a total already includes tax, the pre-tax amount is total ÷ (1 + rate). For example, a $108 total at 8% tax means the pre-tax price was $108 ÷ 1.08 = $100, and the tax portion was $8.
Because the rate applies to the pre-tax amount, not the total. Multiplying the total by the rate over-counts tax already baked in — dividing by (1 + rate) correctly isolates the original price before tax was added.
Yes — the math is identical for any percentage-based consumption tax. Just enter the applicable VAT/GST rate instead of a US sales tax rate.
No. This assumes a single flat rate applied to the full amount. Some jurisdictions exempt certain goods (groceries, clothing under a threshold) or use tiered rates — check local rules for those cases.