🛍️ Discount & SST Calculator

Calculate sale price, SST, and split by quantity

Final Price
RM 80.00
You Save: RM 20.00

Discount & SST Calculator Guide

This Discount & SST Calculator is a simple, free tool that helps Malaysians work out the real price after discounts, SST tax, and bulk-quantity purchases. Whether you are shopping during mega sales like 11.11, Hari Raya, or Black Friday, this tool gives you a fast answer on exactly how much you will pay and how much you will save.

Using it is straightforward. Pick one of three modes at the top: 'Normal Discount' to calculate the price after a single discount, 'Find Original Price' to work backward from a sale price, and 'Stacked Discount' for combining two discount percentages. Enter the price, choose a discount percentage (or tap a preset such as 10%, 20%, or 50%), and the result appears automatically in the coloured card below.

The normal discount calculation is simple: the original price is multiplied by the discount percentage to get the discount amount, which is then subtracted from the original price. If you tick the 'Add SST 6%' box, the calculator adds a 6% service tax on top of the discounted price — following the common practice where tax is applied after the discount is given. You can also choose a quantity to see the grand total for several units.

One of the most common mistakes shoppers make is assuming that stacked discounts can be added together. A '20% + 10%' discount is NOT the same as 30% off. Instead, 20% is subtracted first, then 10% is taken off the remainder. For a RM100 item, this gives a final price of RM72 — an effective discount of only 28%, not 30%. The 'Stacked Discount' mode shows the true effective discount so you are not misled by deals that look better than they really are.

The 'Find Original Price' mode is useful for checking whether a deal is genuine. If a merchant claims an item is '20% off' and now sells for RM80, you can confirm the original price should have been RM100. This helps you avoid being fooled by a falsely inflated 'original' price marked up just before a discount is applied — a tactic sometimes used during sales.

Keep in mind that SST rates and tax rules in Malaysia can change over time, and not all goods or services are taxed at the same rate. This calculator uses the common 6% rate as a general reference. For official totals, always refer to your receipt or the merchant. That said, for quick estimates while shopping and planning your budget, this tool gives accurate and reliable answers.

Frequently Asked Questions

How do I calculate the price after a discount?+

Multiply the original price by the discount percentage to get the discount amount, then subtract it from the original price. For example, RM100 with a 20% discount means a RM20 reduction (100 × 20%), so the final price is RM80. The calculator above does this automatically.

What is SST and what is its rate in Malaysia?+

SST (Sales and Service Tax) is a tax applied to certain goods and services in Malaysia. This calculator uses a common 6% service-tax rate. The actual rate can vary depending on the type of goods or service, so check your receipt or the merchant for the exact rate.

How do I calculate stacked discounts (e.g. 20% + 10%)?+

Stacked discounts are applied one after another, not added together. A 20% then 10% discount is NOT the same as 30% off. First subtract 20% from the original price, then subtract 10% from the remainder. For RM100: RM100 → RM80 (after 20%) → RM72 (after 10%), which is an effective discount of only 28%.

How do I find the original price from a sale price?+

Use the 'Find Original Price' mode. If an item sells for RM80 after a 20% discount, the original price is the sale price divided by (1 minus the discount percentage): RM80 ÷ (1 − 0.20) = RM100. This is handy for verifying whether an advertised discount is genuine.

Is the discount applied before or after SST?+

In most cases, the discount is applied to the original price first, then tax is calculated on the discounted price. This calculator follows that order: it subtracts the discount first, then adds 6% SST to the discounted price. Some merchants may do it differently, so check your receipt.

Is this calculator free and accurate for shopping?+

Yes, this calculator is completely free and uses standard mathematical formulas for discounts, stacked discounts, reverse pricing and SST. It is great for quick estimates while shopping, during mega sales, or when comparing deals. For official totals or exact tax, confirm with the merchant as rates and rules can change.