Tax-exclusive quote
Add the selected percentage to a known pre-tax amount.
Confirm whether the displayed price is legally required to include tax in the relevant market.
Free browser tool
Finance
GST Calculator
Add or extract a user-selected GST or VAT percentage, with illustrative country shortcuts and an optional India CGST/SGST split.
- Free public tool
- No sign-up for this tool
- Processing clearly labeled
- Instant results
Content last reviewed
₹
The price before tax is added.GST rate
Buttons are illustrative arithmetic shortcuts, not a complete or authoritative schedule. The rate depends on the item, transaction, place, and effective date. Verify it with the relevant tax authority and type the applicable percentage into the box above when needed.
How it works
To add tax: GST = base × rate ÷ 100. To remove tax from an inclusive total, divide rather than subtract: base = total ÷ (1 + rate ÷ 100). Subtracting the percentage directly is the most common billing mistake.
Overview
Add or extract a tax percentage while keeping rate selection your responsibility
Select a tax label, enter an amount and percentage, and switch between adding tax to a base price or extracting tax from an inclusive total. The country buttons are arithmetic conveniences, not a complete or authoritative rate schedule; classification, location, exemptions, credits, and filing treatment remain outside the tool.
Add and remove modes
Calculate an inclusive total from a base or recover the base and tax from an inclusive amount.
Multiple tax labels
Switch among GST, VAT, and GST/HST labels with matching display currencies and editable rates.
Custom percentage
Enter any non-negative rate when an illustrative shortcut does not match the applicable classification.
Optional India split
For the India view, the tool divides the entered tax equally into CGST and SGST and notes IGST separately.
How it works
Using GST Calculator, start to finish
Three steps, in the order the tool above actually takes them.
- 1
Confirm the applicable rate
Use the current official schedule for the item, place, date, and transaction before entering a percentage.
- 2
Choose add or remove
Use Add for a tax-exclusive base and Remove for a total that already includes the tax.
- 3
Verify the billing treatment
Check rounding, place of supply, exemptions, credits, invoice rules, and filing obligations with an authority or adviser.
Use cases
What people bring here
The jobs this page is usually opened for, and the setting that makes each one quick.
Inclusive-price reconciliation
Extract the base and included tax by dividing through the rate factor.
Subtracting the percentage directly from the total produces the wrong base.
India intra-state illustration
See the entered percentage divided equally between CGST and SGST.
Place-of-supply and invoice classification determine whether that split is actually appropriate.
Correct maths can use the wrong tax rule
The calculator solves a percentage, not a classification
Official tax schedules attach rates to categories, conditions, locations, and effective dates. A clean base-tax-total split is useful only after the applicable rate and treatment have been established independently.
| Tool element | Unsafe conclusion | Responsible interpretation |
|---|---|---|
| Preset button | This rate applies to every sale in that country. | It is a shortcut; verify the item and transaction with the relevant authority. |
| CGST / SGST split | Every Indian invoice should use two equal lines. | It illustrates an intra-state split; inter-state and special cases differ. |
| EU option | The EU has one VAT rate. | Member states set rates and categories; enter the verified percentage. |
| Calculated total | The result is ready for a return or filing. | It excludes credits, exemptions, place-of-supply logic, and reporting rules. |
Preset button
This rate applies to every sale in that country.
It is a shortcut; verify the item and transaction with the relevant authority.
CGST / SGST split
Every Indian invoice should use two equal lines.
It illustrates an intra-state split; inter-state and special cases differ.
EU option
The EU has one VAT rate.
Member states set rates and categories; enter the verified percentage.
Calculated total
The result is ready for a return or filing.
It excludes credits, exemptions, place-of-supply logic, and reporting rules.
Privacy
Where your work is processed
Region, currency, amount, direction, selected rate, and calculated split stay in component memory in the current browser tab. The calculator does not contact a tax authority, validate a registration, save a return, or upload transaction details.
Calculator inputs stay on this device
The arithmetic runs in the browser and does not connect to a bank, lender, fund, tax account, marketplace, payroll system, or credit bureau. Copy and download actions occur only after you choose them.
Local saving is limited and explicit
Most Finance tools keep values only in the open tab. Profit scenarios are saved to localStorage only when you select Save, while the Invoice Generator autosaves its draft, business profile, invoice number, and embedded logo in localStorage.
Outputs are planning aids
Results follow the entered assumptions and published formulas. They are not quotes, forecasts, filings, affordability decisions, accounting records, or financial, tax, legal, lending, or investment advice.
One aggregate page view may be counted
The page shell can send the tool slug, never calculator inputs, invoice fields, saved products, or results. The endpoint is rate-limited with a transient requesting address and is skipped for Do Not Track or Global Privacy Control.
More detail in how processing works and our privacy policy.
Limits
Arithmetic and regulatory boundaries
The values this tool actually enforces, not a rounded-up version.
- Directions
- Add / extract
- Inclusive tax is recovered by division, not direct subtraction.
- Rate input
- 0 to 100%
- The user remains responsible for selecting the applicable rate.
- India display
- CGST + SGST
- An equal intra-state illustration; IGST is noted but not classified.
- Not modeled
- Filing rules
- No HSN/SAC lookup, credits, thresholds, exemptions, or registration logic.
No rate classification, place-of-supply decision, exemption check, input-credit calculation, or filing advice
The calculator does price arithmetic for the rate you select — it does not classify goods or services, track effective dates, or handle filing concepts such as input tax credits and place of supply. Buttons are illustrative shortcuts rather than an official schedule, and the EU option requires a verified member-state rate. The CGST/SGST display illustrates equal halves for an Indian intra-state scenario. Confirm the applicable rate, treatment, and filing requirements with the relevant authority or a qualified adviser.
FAQ
GST and VAT arithmetic questions
The ones that actually come up.