Indian GST Calculator
Calculate GST amount instantly. Enter any one amount and the other two will auto-calculate.
Enter any of the three amounts and the other two will auto-calculate.
How to use this calculator?
Select the GST rate from the given options.
If you want to calculate GST amount from the amount, then enter amount in Amount excluding GST.
If you have amount including GST then enter amount in Amount including GST and Amount excluding GST & GST amount will be auto-calculated.
If you have GST amount then enter amount in GST amount and Amount excluding GST & Amount including GST will be auto-calculated.
There is a tick on right side of Amount excluding GST, Amount including GST or GST amount. It will show you which amount is entered by you and thus used as basis for calculation.
How GST is Calculated?
GST can be calculated simply by multiplying the Taxable amount by GST rate. If CGST & SGST/UTGST is to be applied then CGST and SGST both amounts are half of the total GST amount.
GST = Taxable Amount x GST Rate
If you have the amount which is already including the GST then you can calculate the GST excluding amount by below formula:
GST excluding amount = GST including amount / (1 + GST rate/100)
For example: GST including amount is Rs. 1,180 and GST rate is 18%.
GST excluding amount = 1180 / (1 + 18/100) = 1180 / 1.18 = 1000
What are the GST rates in India?
GST rates are as under:
- 0% (necessity items like milk, wheat flour)
- 0.25% (rough diamonds)
- 3% (gold, silver etc.)
- 5%, 12%, 18%, 28%
Most of the goods fall in the category of 5%, 12% and 18%, while most of the services fall in the category of 18%. GST of 28% is applicable on some items like cement, car, tobacco. There is also a Cess which is applicable only on a handful of goods like car, tobacco, pan masala.
There are also goods/services on which GST is applicable at NIL rate or which are exempted.
GST inclusive vs GST exclusive
An amount is GST exclusive when the tax has not been added yet — the taxable value on which GST is still to be charged. It is GST inclusive when the tax is already sitting inside the figure, as it is in an MRP or a quoted all-in price.
Going from exclusive to inclusive means adding the tax; going the other way means extracting it, which is the calculation people mean by a reverse GST calculator.
Exclusive → inclusive: Inclusive = Exclusive × (1 + Rate/100)
Inclusive → exclusive: Exclusive = Inclusive / (1 + Rate/100)
The mistake to avoid is subtracting the rate from the inclusive amount. Taking 18% off ₹1,180 gives ₹967.60, which is wrong — the GST-exclusive value is ₹1,180 ÷ 1.18 = ₹1,000. The percentage was charged on the smaller number, so it has to be divided out, not subtracted.
This calculator handles both directions. Enter a figure in “Amount excluding GST” to add tax, or in “Amount including GST” to strip it out. The tick marks which box you typed in, so you always know which way the calculation ran.
18% GST kitna hoga? (18% GST कितना होगा?)
18% GST nikalne ka formula seedha hai: amount ko 18 se multiply karke 100 se divide kar dijiye. Yaani GST = Amount × 18 ÷ 100. Total amount jaanne ke liye us GST ko original amount mein jod dijiye.
Example: ₹1,000 par 18% GST = 1,000 × 18 ÷ 100 = ₹180. Total = ₹1,000 + ₹180 = ₹1,180. Agar aapke paas total (GST included) amount hai, toh use 1.18 se divide kijiye — ₹1,180 ÷ 1.18 = ₹1,000.
| Amount (GST excluding) | 18% GST | Total (GST including) |
|---|---|---|
| ₹499 | ₹89.82 | ₹588.82 |
| ₹550 | ₹99 | ₹649 |
| ₹1,000 | ₹180 | ₹1,180 |
| ₹3,000 | ₹540 | ₹3,540 |
| ₹3,500 | ₹630 | ₹4,130 |
| ₹15,000 | ₹2,700 | ₹17,700 |
| ₹16,000 | ₹2,880 | ₹18,880 |
| ₹24,000 | ₹4,320 | ₹28,320 |
| ₹25,000 | ₹4,500 | ₹29,500 |
| ₹27,000 | ₹4,860 | ₹31,860 |
| ₹68,000 | ₹12,240 | ₹80,240 |
Intra-state sale par yeh 18% do hisson mein banta hai — 9% CGST aur 9% SGST. Inter-state sale par poora 18% IGST hota hai. Dono soorat mein total tax wahi rehta hai.
Kisi bhi doosri rate ya amount ke liye upar calculator mein rate select karke amount daal dijiye — 5%, 12%, 18% aur 28% sabhi rates support hain.
Frequently asked questions
How do I calculate GST from an amount?
Multiply the taxable (GST-exclusive) amount by the GST rate. For example, on ₹1,000 at 18%, GST is 1,000 × 18% = ₹180, and the total invoice value is ₹1,180.
How do I remove GST from a GST-inclusive amount?
Divide the inclusive amount by (1 + GST rate ÷ 100). For ₹1,180 at 18%, the GST-exclusive amount is 1,180 ÷ 1.18 = ₹1,000, so the GST component is ₹180. The calculator does this reverse calculation automatically.
What is the difference between CGST, SGST and IGST?
For sales within the same state, GST is split equally into CGST and SGST. For sales between two states, the full amount is charged as IGST instead. The total GST is the same in both cases.
Is this GST calculator free to use?
Yes, it is completely free, works instantly in your browser, and needs no login or sign-up.
Which GST rate applies to my product or service?
India has five main GST slabs — 0%, 5%, 12%, 18% and 28% — and the correct rate is decided by the HSN or SAC code of the item. Confirm the official rate for your goods or services before billing; 18% is the most common rate.
Is GST charged on top of the MRP?
No. The MRP (maximum retail price) is the highest price payable inclusive of all taxes, so GST is already built into it and cannot be added on top. Use the GST-inclusive (reverse) mode to find the tax already contained in an MRP.
How do I calculate the GST percentage from an amount?
Divide the GST amount by the taxable value and multiply by 100. If you only have the inclusive and exclusive figures, the difference between them is the GST. For example, an exclusive amount of ₹1,000 and an inclusive amount of ₹1,180 means ₹180 of GST, so the rate is 180 ÷ 1,000 × 100 = 18%.
What is the difference between GST inclusive and GST exclusive?
A GST exclusive amount is the taxable value before tax is added. A GST inclusive amount already contains the tax, as an MRP or an all-in quoted price does. To go from exclusive to inclusive, multiply by (1 + rate/100); to go the other way, divide by (1 + rate/100).
How do I calculate an amount excluding GST?
Divide the GST-inclusive amount by (1 + rate/100). At 18%, an inclusive amount of ₹1,180 gives 1,180 ÷ 1.18 = ₹1,000 excluding GST, so the tax component is ₹180. Do not subtract 18% from the inclusive figure — that gives ₹967.60, which is wrong, because the rate was charged on the smaller base amount.
1000 ka 18% GST kitna hoga?
₹1,000 par 18% GST = 1,000 × 18 ÷ 100 = ₹180, aur total amount ₹1,180 ho jayega. Intra-state sale par yeh 9% CGST aur 9% SGST mein banta hai; inter-state par poora 18% IGST hota hai. Kisi bhi amount ke liye formula wahi hai: Amount × 18 ÷ 100.
How is GST rounded on an invoice?
Under Section 170 of the CGST Act, the total tax payable is rounded to the nearest rupee: 50 paise or more is rounded up and less than 50 paise is rounded down.