BUSINESS
VAT calculator
Add VAT, remove VAT from an inclusive price and calculate VAT totals for multiple items.
Neutral presentation is active.
No regional currency, unit or language profile is applied. This choice does not convert values or change formulas, results, routes or legal guidance.
VAT-inclusive price
$115.00VAT amount: $15.00 at 15%.- Excluding VAT
- $100.00
- Reverse VAT net price
- $100.00
- Total VAT for quantity
- $45.00
- Total including VAT
- $345.00 for 3 item(s)
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Verification and calculation details
- Purpose
- VAT calculator
- Variables and units
- Use the labelled fields and units shown in the calculator. Results use those units unless a conversion is stated.
- Formula and method
- The exact formula and worked example are shown below. Deterministic formula executed locally in the browser.
- Assumptions
- Only entered values and stated assumptions are included. Local fees, rules and professional requirements are excluded unless explicitly shown.
- Engine version
- 1.0.0
- Production verification baseline
- Release 63 · source
998803f - Verification run
release-v63-2026-09-20- Last verified
- — Automated release checks passing
Read the Calculation Standard · Report a calculation or source issue
How this calculator works
VAT amount = excluding price × VAT rate ÷ 100. Inclusive total = excluding price + VAT amount. Excluding price from inclusive total = inclusive price ÷ (1 + VAT rate ÷ 100).
Variables and inputs
- Price excluding VAT
- Required numeric input. finite numeric value; calculator-specific validation applies.
- VAT rate
- Optional numeric input. finite numeric value; calculator-specific validation applies.
- Price including VAT to reverse
- Optional numeric input. finite numeric value; calculator-specific validation applies.
- Quantity
- Optional numeric input. finite numeric value; calculator-specific validation applies.
How to interpret the result
The calculator returns VAT amount, VAT-inclusive price, VAT-exclusive price from an inclusive amount, quantity VAT total, quantity total including VAT. Read each output against the assumptions you entered, compare alternatives one variable at a time, and use the result as an estimate rather than a promise.
Common mistakes to avoid
- Mixing units or entering a rate as a decimal when the field requests a percentage.
- Rounding intermediate values instead of the final displayed result.
- Leaving out a cost, timing rule or local requirement listed in the assumptions below.
Practical uses
Use the vat calculator to check a real scenario, compare a changed assumption and explain the arithmetic before relying on a quote, specification or decision.
Worked example
For a price of $100 excluding VAT and a 15% rate, VAT is $15 and the inclusive total is $115. For 3 items, total VAT is $45 and the total including VAT is $345.
Assumptions and limitations
- one user-entered VAT rate applies uniformly to the entire entered amount
- the calculator does not infer country, registration status, exemptions, zero-rating or filing treatment
- results are estimates; confirm rates, prices, units and professional requirements that apply
Important notes
Results are estimates based on the values entered. Confirm rates, prices, units and professional requirements that apply in your location. Review the Answer Atlas Calculation Standard and corrections policy for formula, privacy and correction rules.
Frequently asked questions
Can I use this VAT calculator in any country?
Yes, if you enter the correct local rate. Confirm exemptions, reduced rates and whether the original price includes or excludes VAT.
How do I remove VAT from a VAT-inclusive price?
Divide the inclusive price by 1 plus the VAT rate as a decimal. For example, at 15%, divide the inclusive price by 1.15.
Is VAT the same as sales tax?
No. Both are consumption taxes, but collection methods, exemptions and reporting rules differ by jurisdiction.