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Sales Tax Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Sales tax
₹80.00
- Total (with tax)
- ₹1,080.00
- Amount before tax
- ₹1,000.00
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Sales Tax Calculator
The Sales Tax Calculator works out your sales tax, along with 2 related figures in an instant. Enter amount (before tax) and sales tax rate and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the amount (before tax).
- Enter the sales tax rate.
- Read off your sales tax, together with total (with tax) and amount before tax — the calculator updates automatically, with no button to press.
Formula
The Sales Tax Calculator uses the formula:
Sales tax = Amount (before tax) × Sales tax rate ÷ 100
Worked example
For example, with amount (before tax) of ₹1,000 and sales tax rate of 8%, the sales tax is ₹80.00.
| Amount (before tax) | ₹1,000 |
|---|---|
| Sales tax rate | 8% |
| Sales tax | ₹80.00 |
|---|---|
| Total (with tax) | ₹1,080.00 |
| Amount before tax | ₹1,000.00 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Multiply the pre-tax amount by the tax rate and divide by 100 to get the tax, then add it to the amount for the total. For example, 8% sales tax on 1,000 is 80, for a total of 1,080.
Use the rate that applies where you are buying. Rates vary by country, state and sometimes city, and some goods are taxed at reduced or zero rates. Enter your local rate for an accurate result.
Divide the total by (1 + rate ÷ 100). For example, with 8% tax a total of 1,080 came from 1,080 ÷ 1.08 = 1,000 before tax.
They are similar consumption taxes but applied differently. This calculator adds a single flat percentage; for India's GST with its slab rates, use the dedicated GST calculator.
Enter the amount (before tax). Enter the sales tax rate. Read off your sales tax, together with total (with tax) and amount before tax — the calculator updates automatically, with no button to press.
Related guides
Sales Tax Table: Sales tax by Amount (before tax)
Reference table of sales tax for Sales Tax across a range of amount (before tax) values — exact, engine-computed figures you can read off at a glance.
How to Calculate Sales Tax: Formula, Steps & Examples
Learn how to calculate Sales Tax — the formula explained step by step, with worked examples and a free calculator to check your answer.