Discount Calculator
Quickly calculate the final price of an item on sale. Factor in multiple stacked discounts, local sales tax, and explore interactive savings visualizers instantly.
₹80
After 20% discount
Pricing & Discount Parameters
Synchronized SlidersYou are saving ₹20 (20.00% overall) on this purchase!
Proportional Price & Savings Breakdown
Visualizing where every unit of the original ₹100 goes
Did You Know? Financial & Retail Facts
Stacking two 50% discounts does NOT make an item free (100% off). The secondary 50% applies to the remaining half, yielding a total savings of 75% (1,000 → 500 → 250).
Common Stacked Discounts Reference Table
See how compounding markdowns compare against naive linear addition across common retail promotional tiers:
| Primary (D1) | Stacked (D2) | Naive Sum (Myth) | True Effective Off | Retail Margin Gap | $100 Item Pays |
|---|---|---|---|---|---|
| 20% | +10% | 30% | 28.00% | +2.00% | $100 → $72.00 |
| 30% | +20% | 50% | 44.00% | +6.00% | $100 → $56.00 |
| 40% | +15% | 55% | 49.00% | +6.00% | $100 → $51.00 |
| 50% | +20% | 70% | 60.00% | +10.00% | $100 → $40.00 |
| 50% | +50% | 100% | 75.00% | +25.00% | $100 → $25.00 |
| 60% | +10% | 70% | 64.00% | +6.00% | $100 → $36.00 |
| 70% | +30% | 100% | 79.00% | +21.00% | $100 → $21.00 |
Why Use Our Free Online Discount Calculator?
Whether you are shopping during Black Friday, calculating markdowns for your store, or applying tax to an invoice, this tool provides an instant and accurate breakdown.
- Stacked Discounts: Full support for "Take an extra X% off" clearance sales.
- Tax Integration: Easily add sales tax or GST to see your true out-of-pocket cost.
- Visual Segment Bar: See exactly what percentage of the price goes to payment vs savings.
- One-Click Receipt Copy: Get a line-by-line itemized receipt ready for sharing or printing.
- 100% Private & Secure: All calculations happen locally in your browser memory.
How to Use
Find your final price in seconds:
- Original Price: Enter or slide the sticker price of the item.
- Discount 1: Select the primary sale percentage.
- Discount 2 (Optional): Add a stacked coupon (e.g., clearance bonus).
- Tax (Optional): Enter your local sales tax or GST percentage.
- Explore Visualizers: Review the proportional segment bar and margin gap simulator.
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Frequently Asked Questions
A stacked discount (like taking an extra 10% off a 20% clearance item) applies the second discount to the ALREADY discounted price, not the original price. For example, 20% off $100 makes it $80. Taking an extra 10% off applies to the $80, making the final price $72 (a total effective discount of 28%, not 30%).
In almost all regions, sales tax is calculated AFTER the discounts have been applied to the item's price. Our calculator follows this standard rule by calculating the tax on the final discounted subtotal.
The effective discount represents the total actual percentage you saved off the original price, before tax. It is calculated by dividing your total savings by the original price.
No! Mathematically, (1 - D1) × (1 - D2) = (1 - D2) × (1 - D1). Whether a 20% coupon is applied first or a 10% coupon is applied first, the final subtotal and total savings are exactly the same.
No. This discount calculator works entirely in your web browser. Your numbers and calculations are never sent to our servers, ensuring complete privacy and blazing fast performance.