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Frequently Asked Questions
Select "Add GST" mode, enter your base amount, choose the GST rate (5%, 18%, or 40%), and click Calculate. The tool shows the GST amount, total price, and CGST/SGST breakdown instantly.
Select "Remove GST" mode, enter the GST-inclusive amount, choose the applicable GST rate, and click Calculate. The tool calculates the original base price and GST amount from the inclusive total.
Under GST 2.0 (effective September 22, 2025), India has three main slabs: 5% (essential goods like food, medicine), 18% (most services, electronics, restaurants), and 40% (luxury and sin goods like aerated drinks, tobacco, luxury vehicles). The old 12% and 28% slabs have been removed.
CGST (Central GST) and SGST (State GST) are two halves of intra-state GST. For example, 18% GST = 9% CGST + 9% SGST. For inter-state transactions, IGST applies instead (equal to the full GST rate).
The calculator supports all current GST 2.0 slabs (5%, 18%, 40%) as well as a custom rate field for special cases like 0.25%, 3%, or any other applicable rate.
Yes, CodBolt's GST calculator is completely free — no signup, no subscription, no ads. Just enter your amount, select the rate, and get instant results.