Set to "Including GST" already. Enter the total and pick the rate.
A reverse GST calculation starts from the final price, such as an MRP or a bill total, and works out how much of it is tax. The formula is taxable value = total ÷ (1 + rate ÷ 100).
A reverse GST calculation starts from the final price, such as an MRP or a bill total, and works out how much of it is tax. The formula is taxable value = total ÷ (1 + rate ÷ 100).
For example, an MRP of ₹1,180 that includes 18% GST has a taxable value of ₹1,000 and ₹180 of GST. Taking 18% off ₹1,180 would give the wrong answer, because GST was charged on the lower amount.
Also searched as: reverse gst calculator, gst inclusive calculator, remove gst from total, gst reverse calculation formula, mrp to base price calculator.
Divide the total by 1 plus the rate as a decimal. For 18%, divide by 1.18; for 5%, divide by 1.05. The difference between the total and the result is the GST.
Divide the MRP by 1.18. An MRP of ₹590 gives ₹500 before tax and ₹90 of GST.
Divide the total by 1.05. A total of ₹1,050 gives ₹1,000 before tax and ₹50 of GST.
Yes, it is free, with no sign-up. Everything is worked out inside your browser, so nothing you type is sent to a server.