Calculating your final price is straightforward once you know the Discount and Tax formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Discount and Tax Calculator.
What is Discount and Tax?
The Discount and Tax calculation tells you your final price from a few simple inputs. The figure you are solving for here is the final price, expressed in INR.
The Discount and Tax formula
The core formula is:
Final price = Original price × (1 - Discount ÷ 100) × (1 + Tax ÷ 100)Here is what each input means:
- Original price — a money amount. Example: ₹1,000.
- Discount — a percentage, such as an annual rate. Example: 2%.
- Tax — a percentage, such as an annual rate. Example: 18%.
How to calculate it step by step
- Write down the original price (for example, ₹1,000).
- Write down the discount (for example, 2%).
- Write down the tax (for example, 18%).
- Apply the formula above to get your final price.
- Double-check the result with the Discount and Tax Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Original price | ₹1,000 |
| Discount | 2% |
| Tax | 18% |
| Final price | ₹944.00 |
| You save (vs full price + tax) | ₹236.00 |
With original price of ₹1,000, discount of 2% and tax of 18%, the final price works out to ₹944.00.
Example 2
With original price of ₹2,000, discount of 2% and tax of 18%, the final price works out to ₹1,888.00.
| Result | Value |
|---|---|
| Final price | ₹1,888.00 |
| You save (vs full price + tax) | ₹472.00 |
Example 3
With original price of ₹500, discount of 2% and tax of 18%, the final price works out to ₹472.00.
| Result | Value |
|---|---|
| Final price | ₹472.00 |
| You save (vs full price + tax) | ₹118.00 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Discount and Tax Calculator does it instantly, for free, with the formula and a worked example built in.
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