Enter amount and rate to get started
Try an example, or enter your own values above.
How to use the GST / VAT Calculator
- Pick Add GST (exclusive amount) or Remove GST (inclusive amount).
- Enter the amount and the GST/VAT rate percentage.
- Click Calculate to see the tax amount and total.
- Use the Copy or Share buttons to save or send your result.
Tip: Use "Remove GST" when your amount already includes tax and you need to find the original pre-tax price.
Common mistakes to avoid
- Using "Add GST" on an amount that already includes tax.
- Entering the wrong GST/VAT rate for your region.
- Forgetting rates can differ by product/service category.
Add vs. Remove GST
Two different calculations
Add GST: Tax = (Amount × Rate) ÷ 100, Total = Amount + Tax — use this when your amount excludes tax. Remove GST: Net = Amount ÷ (1 + Rate/100), Tax = Amount − Net — use this when your amount already includes tax.
When to use this tool
Useful for invoicing, price comparisons, and checking whether a quoted price includes tax.
✓ Pros
- Works instantly, right in your browser
- Handles both add and remove GST calculations
- No sign-up, no ads blocking the result
✕ Limitations
- Single flat rate only, no mixed-rate items
- Doesn’t account for region-specific exemptions
- Not a substitute for official tax software
Common GST/VAT Rates
Reference rates commonly used in different regions (verify current local rates before filing).
| Rate | Common Use | Example |
|---|---|---|
5% | Reduced/essential rate | 1000 → 50 tax |
12% | Standard reduced rate | 1000 → 120 tax |
18% | Common standard rate | 1000 → 180 tax |
Rates vary by country and product category — always confirm the current official rate for your situation.
Features
Add or remove GST
Instant results
No data stored
Mobile friendly
How TickmarkTools compares
An honest, feature-by-feature look at browser-based finance tools.
| Feature | TickmarkTools | Typical free sites | Premium suites |
|---|---|---|---|
| Price | Free | Free / freemium | Free tier + paid plans |
| Sign-up required | No | Often yes | Yes |
| Data leaves your device | Never | Usually | Usually |
| Watermark on export | None | Sometimes | On free tier |
| Mobile friendly | ✓ | Varies | ✓ |
| Works without account | ✓ | Varies | ✗ |
These are general, illustrative observations about common patterns across free online calculator tools as a category — not verified or benchmarked data about any specific named competitor or product. Individual sites vary and may differ from what's shown here.
Why you can trust this tool
No data stored
Your input is never saved or logged.
Secure processing
All processing happens client-side in your browser.
Fast processing
Results render in milliseconds, no waiting.
Mobile friendly
Use this tool from any device.
No sign-up
No account, no email, no watermark.
Works offline*
Once loaded, this tool needs no internet connection.
Accuracy & limitations
This calculator is built for speed and accuracy, but it's worth understanding what it does and doesn't account for:
- Single flat rate. This tool applies one rate at a time and doesn’t split mixed-rate invoices.
- No regional exemptions. Some goods/services are exempt or zero-rated in certain regions — this tool doesn’t know your local exemption rules.
- Not official tax software. For filing purposes, always double-check with official government tax tools or an accountant.
GST / VAT Calculator FAQ
Yes, the GST / VAT Calculator is completely free with no sign-up required.
No — all calculations happen locally in your browser.
Add GST calculates tax on top of a tax-exclusive amount; Remove GST extracts the tax already included in a tax-inclusive amount.
The default is just a common example — change the rate field to match your local GST/VAT rate.
Yes, the calculation is the same regardless of whether your region calls it GST or VAT.
No. All calculations run entirely in your browser, and nothing you enter is ever sent to a server or stored.
💡 Quick Help
Tap a common question below for an instant, pre-written answer. This is a deterministic help widget, not a live AI assistant.
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