Tax changes your real take-home or net return, so ignoring it overstates results.

What are common gst mistakes?

Confusing tax-inclusive and tax-exclusive prices — removing GST is not the same as subtracting the rate.

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100% free · no signupRuns in your browser

GST Calculator

Add or remove GST/VAT from any amount instantly.

Best for: Use it to price products with tax, to extract the taxable value from a GST-inclusive bill, or to split a payment into CGST and SGST for an invoice.

Complete guide

Why this result happened View assumptions

Tax country:

Input

Sales-tax / VAT / GST rates shown are standard national rates for general estimation only — not tax advice. Reduced rates, exemptions, thresholds and local variations may apply.

Figures verified on 16 June 2026. Tax and financial rules change — always confirm the current rules with the official authority or a qualified professional before you act.

Amount

Sales Tax rate

How it's calculated & sources

The GST Calculator uses the standard formula for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Figures are educational estimates, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

Key assumptions

Rate as selected
Inclusive or exclusive as chosen

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

How it works

Add Sales Tax: Total = Net × (1 + rate).
Remove Sales Tax: Net = Total ÷ (1 + rate).

Example

$1,000 net at 7% Sales Tax = $1,070 total.

Frequently asked questions

How do I change country?+

Use the region selector in the top bar — the tax name and default rate update to your country automatically.

Is GST the same as VAT?+

Functionally yes — both are consumption taxes added to the sale price of goods and services.

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Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is GST?: A GST calculator adds or removes India's Goods and Services Tax at the 5%, 12%, 18%, or 28% slab — giving you the tax amount and the gross (inclusive) or net (exclusive) price.
Why does GST matter?: Tax changes your real take-home or net return, so ignoring it overstates results.
How is GST calculated?: To add GST: tax = amount × rate ÷ 100, and gross = amount + tax. To remove GST from a tax-inclusive price: base = gross × 100 ÷ (100 + rate), and tax = gross − base. For intra-state supply the tax splits equally into CGST and SGST. Formula: GST = Amount × Rate ÷ 100 | Base (from inclusive) = Total × 100 ÷ (100 + Rate).
What is a good gst?: Standard slabs are 5%, 12%, 18% and 28%; most services sit at 18%. The correct slab depends on the HSN/SAC classification of the good or service.
What are common gst mistakes?: Confusing tax-inclusive and tax-exclusive prices — removing GST is not the same as subtracting the rate.
When should you use the GST Calculator?: Use it to price products with tax, to extract the taxable value from a GST-inclusive bill, or to split a payment into CGST and SGST for an invoice.

What is the GST Calculator?

A GST calculator adds or removes India's Goods and Services Tax at the 5%, 12%, 18%, or 28% slab — giving you the tax amount and the gross (inclusive) or net (exclusive) price.

How the GST Calculator works

To add GST: tax = amount × rate ÷ 100, and gross = amount + tax. To remove GST from a tax-inclusive price: base = gross × 100 ÷ (100 + rate), and tax = gross − base. For intra-state supply the tax splits equally into CGST and SGST.

GST = Amount × Rate ÷ 100 | Base (from inclusive) = Total × 100 ÷ (100 + Rate)

Understanding the inputs

What each value means, why it matters, and a typical range — so you can fill in the calculator with confidence.

Tax Rate

The percentage of income, profit or a purchase that goes to tax.

Why it matters:: Tax changes your real take-home or net return, so ignoring it overstates results.
Typical range:: Income tax bands commonly range from 0% to about 45% depending on income and country.

How it affects results:

Higher: Less money kept after tax.
Lower: More money kept after tax.

Common mistake: Confusing your marginal rate (on the next dollar) with your effective (average) rate.

What impacts results most

1.
Amount (High impact)The base GST is applied to.
2.
GST rate (High impact)Directly sets the tax.

Key assumptions

Rate as selected
Inclusive or exclusive as chosen

What's a typical value?

Standard slabs are 5%, 12%, 18% and 28%; most services sit at 18%. The correct slab depends on the HSN/SAC classification of the good or service.

India GST — common slabs on a ₹10,000 base value

5%	₹500	₹10,500	₹250 + ₹250
12%	₹1,200	₹11,200	₹600 + ₹600
18%	₹1,800	₹11,800	₹900 + ₹900
28%	₹2,800	₹12,800	₹1,400 + ₹1,400

Worked example

₹1,000 at 18% GST: GST = ₹180 → inclusive price ₹1,180 Reverse: ₹1,180 inclusive at 18% → base ₹1,000, GST ₹180 (CGST ₹90 + SGST ₹90).

Common mistakes to avoid

Confusing tax-inclusive and tax-exclusive prices — removing GST is not the same as subtracting the rate.
Applying the wrong slab; the rate is set by HSN/SAC classification, not guesswork.
Forgetting the CGST/SGST split on intra-state supply versus IGST on inter-state supply.

Related concepts

How GST connects to the concepts around it.

VAT:: A consumption tax charged at each stage of supply.
Income Tax:: Tax on earnings, set by slabs or brackets.

Reviewed sources & methodology

Methodology: Government / Standard · Last reviewed June 2026.

India Income Tax Department · Government / Official

Keywords: gst, vat, tax.

This is an educational estimate, not financial advice. Rates, rules and figures change — verify the latest with the provider or a qualified advisor before you decide.

Sources: CBIC — GST (Government of India)

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the GST Calculator free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the GST Calculator?+

GST Calculator uses the standard gst formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The GST Calculator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the GST Calculator on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

Explore more

Popular calculations

Instant answers with formula, steps and FAQ — or enter your own values above.

GST on ₹10,000GST on ₹50,000GST on ₹1,00,000GST on ₹50,000 at 12%

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Add or remove GST/VAT from any amount instantly.

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Frequently asked questions

Continue your journey

Complete guide

Quick answers

What is the GST Calculator?

How the GST Calculator works

Understanding the inputs

Tax Rate

What impacts results most

Key assumptions

What's a typical value?

India GST — common slabs on a ₹10,000 base value

Worked example

Common mistakes to avoid

Related concepts

Reviewed sources & methodology

Frequently asked questions

Explore more

Popular tools

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Popular calculations

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