Discount, sale price and GST calculator
Check sale prices before you buy, and work out sales tax for quotes and invoices. Use the Discount tab for "30% off" or "50% + 10% extra" sales, Sales tax to add 18% GST to a price or find the tax inside a price, and Discount + tax for a full bill.
Questions
How do I calculate 18% GST on a price?
Multiply the price by 0.18 for the tax, or by 1.18 for the total. Rs 1,000 + 18% = Rs 1,180.
How do I remove GST from a total?
Divide by 1.18. Rs 1,180 ÷ 1.18 = Rs 1,000, so the tax was Rs 180.
Is 50% + 20% off the same as 70% off?
No. 20% is taken off the reduced price, so the total discount is 60%.