GST Calculator: free online, fast and secure
Shop owners, freelancers, accountants and buyers calculate GST every day. This calculator works both ways: add GST to a base price, or find the base price and tax inside a GST-inclusive amount.
It supports all standard slabs plus a custom rate, and shows the split as CGST + SGST for sales within a state, or IGST for inter-state sales.
How to use GST Calculator
- Enter the amount. Base price or GST-inclusive total.
- Choose rate and mode. Pick the slab, add or remove GST, and intra- or inter-state supply.
- Read the breakdown. Net amount, GST, total and CGST/SGST or IGST.
Why use ConvertKaro GST Calculator? Free, fast and secure
Many online tools upload your file to a remote server and make you wait. ConvertKaro is different.
100% Free
Use GST Calculator completely free, every day. No credit card, no “pro” version and no daily cap on files.
Fast results
No waiting for uploads to finish. The work happens on your device the moment you add a file, which makes it noticeably faster than server-based tools.
Secure and private
Your files never leave your device. ConvertKaro does not upload, store or look at your documents and photos, which makes it safe for ID cards, bank statements and private pictures.
No signup, no watermark
You do not need to sign up or log in, and your output is clean, without any logo or branding.
Works on every device
Nothing to install: it runs in any modern browser on phones, tablets and computers.
Both directions
Add GST on top or remove GST from an inclusive price with the same tool.
ConvertKaro vs other websites and apps
| ConvertKaro | Typical website or app | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your data | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
GST slabs at a glance
| Rate | Typical examples |
|---|---|
| 0% / exempt | Fresh fruits and vegetables, milk, unbranded grains |
| 5% | Packaged food items, economy transport, some textiles |
| 12% | Processed foods, some electronics and services |
| 18% | Most services, furniture, electronics, restaurants in hotels |
| 28% | Luxury and sin goods, some automobiles |
Rates change from time to time through GST Council decisions, so always confirm the rate for your HSN or SAC code.
Common uses for GST Calculator
- Making invoices and quotations
- Checking GST on bills and receipts
- Pricing products for online stores
- Freelancer service invoices
- Calculating input tax credit amounts
Tips for the best results
- Within the same state, GST splits equally into CGST and SGST.
- For sales to another state, the full rate is IGST.
- To remove GST: base = amount ÷ (1 + rate/100).
- Check current GST rates for your product with your accountant or the CBIC website.
Good to know
Calculators are only as good as their inputs. Use the exact rate and tenure from your bank or offer letter, and remember that results are estimates for planning. GST Calculator does not store your figures, so you can use real numbers privately. For important financial decisions, confirm the final values with your bank, accountant or financial advisor.
| Price | Free, no limits |
|---|---|
| Processing | In your browser, instant |
| Signup | Not required |
| Watermark | None |
| Works on | Android, iPhone, Windows, Mac, Linux |
| Category | Calculator tools |
How GST Calculator keeps your numbers private
Everything you enter into GST Calculator stays on your device. The tool works offline once the page has loaded, because all the logic is in the page itself rather than on a server. We never receive, log or store your numbers, so you can use it at work, at school or for personal matters without worrying about privacy.
Using GST Calculator on your phone
On a phone, open this page in Chrome or Safari, tap the main button and pick or paste what you need. Results download straight to your phone, usually into the Downloads folder or Files app. You can also add this page to your home screen for one-tap access next time.
Who uses GST Calculator?
You do not need any technical knowledge to use it. It is popular with:
- Salaried people planning loans, savings and investments
- Shop owners and freelancers calculating GST and discounts
- Students solving maths and finance problems
- Families planning budgets and big purchases
- Anyone who wants a quick, accurate answer without a spreadsheet
Supported input: Indian number format (lakh and crore) with ₹ amounts, and standard units.
Frequently asked questions
How do I calculate GST on a price?
Multiply the base price by the GST rate. For ₹10,000 at 18%, GST is ₹1,800 and the total is ₹11,800.
How do I remove GST from a total?
Divide the total by 1 plus the rate. ₹11,800 ÷ 1.18 = ₹10,000 base and ₹1,800 GST.
What is the difference between CGST, SGST and IGST?
CGST and SGST are charged together on sales within a state; IGST is charged on sales between states.
Is GST Calculator really free?
Yes, completely free. You can use it as many times as you want, and every option on the page is included at no cost.
Is it safe to use GST Calculator online?
Yes. Your data are processed inside your own browser and are never uploaded to our servers, so nobody else can see them.
Does GST Calculator work on mobile?
Yes, the tool is built mobile-first. Open this page on your phone, add your data and download the result directly.
Do I need to install anything to use GST Calculator?
No. GST Calculator works in your web browser. There is no app, plug-in or extension to install.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Copy or download the result as it is.
Does GST Calculator work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.
Related free tools
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