GST formulas
- Add GST: GST = amount × rate ÷ 100; total = amount + GST.
- Remove GST: base = total ÷ (1 + rate ÷ 100); GST = total − base.
- Intra-state: CGST = SGST = GST ÷ 2. Inter-state: IGST = GST.
GST 2.0 slabs at a glance
| Rate | Typical items |
|---|---|
| 0% | Fresh food, milk, education, healthcare services, many life-saving drugs |
| 5% | Daily essentials, many packaged foods, some medicines, small hotels |
| 18% | Most goods and services: electronics, appliances, restaurants in hotels, professional services |
| 40% | Luxury and sin goods such as tobacco, aerated drinks, large cars and bikes above 350 cc |
Examples are indicative. The legally applicable rate depends on the HSN/SAC code; check the CBIC notification.
How to use the GST Calculator tool
- Enter the amount.
- Pick Add GST (amount excludes GST) or Remove GST (amount includes GST).
- Choose the rate: 5%, 18%, 40% or a custom rate.
- Read the base price, GST and CGST/SGST or IGST split.
Why SaralKit?
- Free forever: no "credits", no trial, no premium tier, no watermark and no daily limit.
- No account, ever: nothing to sign up for. Just open the page and use it.
- No data stored: your files and the numbers you type are processed by your own browser. We never upload, store or see them.
- Works offline: once the page has loaded, most tools keep working without internet.
- Open source: anyone can read the code on GitHub.
Frequently asked questions
What are the GST rates in 2026?
Since GST 2.0 (22 September 2025) most goods and services fall under two main slabs, 5% and 18%, with 40% for luxury and "sin" goods. Some items are exempt (0%), and special rates such as 3% (gold) and 0.25% (rough diamonds) remain. Check the CBIC rate notification for a specific item.
How do I remove GST from a price (reverse GST)?
Choose Remove GST. Base price = inclusive price ÷ (1 + rate/100). For example, ₹1,180 including 18% GST has a base price of ₹1,000 and GST of ₹180.
What is CGST, SGST and IGST?
For a sale within the same state, GST is split equally into CGST (central) and SGST (state). For a sale to another state, the full GST is charged as IGST.
How do I add 18% GST?
Choose Add GST and 18%: total = amount × 1.18. ₹10,000 + 18% GST = ₹11,800.