Sales Tax Calculator

Need a quick way to figure out the price after tax—or back into the pre-tax price from a receipt? This Sales Tax Calculator lets you do both in seconds. Enter a price and tax rate to get the tax amount and total after tax, or switch modes to solve for the price before tax or the tax rate from a known total. It’s fast, accurate, and works with multiple currencies.

What this calculator does

• Total after tax: Input the price before tax and your tax rate. You’ll see the tax amount and final total.
• Price before tax: Know the final total and tax rate? We’ll reverse-calculate the original pre-tax price.
• Tax amount only: Quickly find just the tax for a line item.
• Find the tax rate: Enter a pre-tax price and final total to compute the implied percentage.

Formulas (kept simple)

• Tax amount = Price × (Tax rate ÷ 100)
• Total after tax = Price + Tax amount
• Price before tax = Total ÷ (1 + Tax rate ÷ 100)
• Tax rate % = (Total − Price) ÷ Price × 100

The tool shows these steps in the solution panel so you can audit the math or paste into an email or estimate.

Quick example

Suppose a jacket costs $79.99 and your tax rate is 8.25%:

• Tax = 79.99 × 0.0825 = $6.60
• Total = 79.99 + 6.60 = $86.59

If you only know the $86.59 total and the 8.25% rate, switch to “Price before tax” and the calculator returns $79.99 and $6.60 automatically.

Practical tips

• Rounding: Retailers often round at the line or invoice level. If you’re matching a receipt, round your inputs the same way.
• Tax-inclusive pricing: Some countries display prices with tax included. Use “Price before tax” mode to extract the base price.
• Shipping & fees: Tax rules vary—sometimes shipping or handling is taxable. Add those amounts to the pre-tax price if your jurisdiction requires it.
• Discounts: Apply discounts before you compute tax to avoid over-collecting.
• Multiple rates: If an order spans items taxed differently, run each line through the calculator and then sum the results.

Why use this tool

• Accuracy without a spreadsheet: Perfect for customer quotes, invoices, and POS checks.
• Clarity for clients: Copy or select the answer block to drop clean math into emails or proposals.
• Flexible workflows: Calculate forward or backward depending on what you know—price, tax rate, or final total.

Whether you’re pricing a single product, validating a receipt, or preparing a quick quote, this Sales Tax Calculator gives you the right numbers with clear steps to back them up.