Free GST Calculator Online

To calculate GST in a calculator, use these simple steps:

1. To Add GST (Exclusive GST): Multiply the net amount by the GST rate, then divide by 100.
Formula: GST Amount = Net Amount × (GST Rate ÷ 100)
Example: For ₹1,000 at 18% GST, calculate 1000 × 18 ÷ 100 = ₹180 GST. Total amount is ₹1,180.

2. To Remove GST (Inclusive GST): Divide the total amount by (1 + (GST Rate ÷ 100)).
Formula: Original Value = Total Amount ÷ (1 + (GST Rate ÷ 100))
Example: For a total amount of ₹1,180 with 18% GST, calculate 1180 ÷ 1.18 = ₹1,000 original price.

To calculate GST on a standard calculator, you can use the percentage (%) button or basic multipliers:

• Add GST (e.g., 18%): Enter the base amount, press +, type 18, and press %. Alternatively, multiply the base amount by 1.18.
• Find GST Amount Only: Enter the base amount, press ×, type 18, and press % (or multiply by 0.18).
• Remove GST: Divide the total inclusive price by 1.18 (for 18% GST), 1.12 (for 12%), or 1.05 (for 5%).

To remove GST from a total amount on a calculator, apply the reverse GST formula:

Base Price = Total Amount ÷ (1 + (GST Rate ÷ 100))

For example, if you want to remove 18% GST from a total of ₹5,900:
1. Calculate the divisor: 1 + (18 ÷ 100) = 1.18.
2. Divide the total: 5900 ÷ 1.18 = ₹5,000 (pre-tax base price).
3. Subtract to find the tax removed: 5900 - 5000 = ₹900.

To calculate 18% GST on any amount:

• Exclusive GST (Add 18%): Multiply the base amount by 0.18.
Example: For ₹10,000 base value, GST is 10,000 × 0.18 = ₹1,800. Total is ₹11,800.
• Inclusive GST (Extract 18%): Divide the total price by 1.18 to find the original amount, then subtract it from the total.
Example: For ₹11,800 total price, base is 11,800 ÷ 1.18 = ₹10,000. GST amount is ₹1,800.

To remove 18% GST from a total inclusive amount, divide the amount by 1.18. This reverses the tax addition and gives you the original value.

• Formula: Original Value = Total Amount ÷ 1.18
• Example: If the invoice total is ₹23,600, the pre-GST base price is 23,600 ÷ 1.18 = ₹20,000. The GST amount removed is 23,600 - 20,000 = ₹3,600.

The GST amount on 1 lakh (₹1,00,000) depends on the GST slab rate and whether the amount is GST-exclusive or GST-inclusive:

• At 5% GST: ₹5,000 (Exclusive) or ₹4,761.90 (Inclusive)
• At 12% GST: ₹12,000 (Exclusive) or ₹10,714.29 (Inclusive)
• At 18% GST: ₹18,000 (Exclusive) or ₹15,254.24 (Inclusive)
• At 28% GST: ₹28,000 (Exclusive) or ₹21,875.00 (Inclusive)

To calculate 5 percent GST:

• GST Exclusive (Add 5%): Multiply the base amount by 0.05.
Example: For ₹50,000 base value, GST is 50,000 × 0.05 = ₹2,500. Total is ₹52,500.
• GST Inclusive (Extract 5%): Divide the total amount by 1.05 to find the pre-tax amount.
Example: For ₹52,500 total, base is 52,500 ÷ 1.05 = ₹50,000. GST amount is ₹2,500.

GST (Goods and Services Tax) is an indirect tax levied on the supply of goods and services in India. It was introduced on 1 July 2017 and replaced multiple central and state taxes like VAT, service tax, and excise duty.

India has five main GST slabs: 0%, 5%, 12%, 18%, and 28%. Essential goods like unprocessed food are exempt (0%), while luxury or demerit goods attract the highest rate of 28%.

Exclusive GST means the price you see does not include GST — the tax is added on top. Inclusive GST means the quoted price already contains the tax. Use the reverse mode to extract the taxable value from an inclusive amount.

For intra-state transactions (within the same state), GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions (between states), the combined tax is called IGST (Integrated GST), which the central government collects and distributes.

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