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What is GST Calculator?
Calculate Goods and Services Tax (GST) instantly. Whether you need to add GST to a price or work backwards to find the pre-GST amount, our GST Calculator handles both inclusive and exclusive calculations across all GST slabs — 5%, 12%, 18%, and 28%.
Key Features
How to Use GST Calculator
Enter the base amount or total amount
Select the applicable GST rate
Choose inclusive or exclusive calculation
Click Submit to see GST amount, CGST, SGST, and total
Common Use Cases
Tips & Best Practices
For invoicing, use exclusive GST to add tax on top of your price
For reconciling received payments, use inclusive GST to extract the base amount
The 18% slab covers most professional services
Frequently Asked Questions
What is the difference between inclusive and exclusive GST?
Exclusive: GST is added ON TOP of the price. Inclusive: GST is already INCLUDED in the price and you want to find the base amount.
What is CGST and SGST?
GST is split into CGST (Central GST) and SGST (State GST), each at half the total GST rate for intra-state transactions.
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GST Calculator is part of our Finance & Calculators tools collection at AllInAOne. Use our free online tools for all your finance & calculators needs — no registration required.