Calculateur de VAT
Add or estimate VAT from a net amount and VAT rate.
Formula and method
This calculator computes VAT amount, Gross amount directly in your browser without sending data to an external server.
Mathematical formula
- VAT amount:
net × vat ÷ 100 - Gross amount:
net × (1+vat ÷ 100)
Variables and parameters
- Net amount (net): default value 100 $.
- VAT rate (vat): default value 20 %.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does VAT Calculator use?
VAT Calculator evaluates outputs such as <strong>VAT amount, Gross amount</strong> based on inputs including Net amount, VAT rate. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into VAT Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in VAT Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is VAT Calculator free to use?
Yes. VAT Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does VAT Calculator store or upload my data?
No. VAT Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is VAT Calculator?
VAT Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed VAT Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of VAT Calculator to your own blog post or page.