Calculate tax and total from a net amount

When values need comparing or a one-off calculation needs checking, this helps students, individuals and professionals. Calculate tax and total from a net amount.

Calculate tax and total from a net amount. The result appears instantly in your browser, ready to copy, with no account, upload or storage involved.

How to use

Enter the net amount, then type the VAT rate to apply on the next line.
Run the calculation to get the tax amount and the gross total.
Read the result and copy the figures you need for an invoice, quote or quick check.
Clear the fields before moving on to another amount or rate.
Confirm that the rate you typed matches the one you are required to use before reusing the total.

Example

With the sample values, the calculator takes the net amount and the rate you provide, then shows the tax and the total separately. Look at both figures to confirm that the tax matches the rate and that the total includes it. This helps avoid a copy error in a quote or an expense note.

Input

100
20

Output

HT: 100
TVA (20%): 20
TTC: 120

Limits and formats

The tool only applies the rate you type; it has no built-in knowledge of country or product VAT rules.
Always confirm the current rate before relying on the figure.
Decimal values must be entered in a way the field accepts.
It does not handle multiple invoice lines, discounts or rounding policies.
A rounding difference from your accounting software can produce a small gap.

Where processing happens

The arithmetic happens directly in your browser. The amount and rate you type are not sent to an external service and are not stored after you leave the page.

Frequently asked questions

Can I enter a VAT rate with decimals?

Yes, you may use a decimal rate if the field accepts it. The calculator will apply the exact percentage you provide when working out the tax and total.

Does it calculate VAT for several amounts at once?

No, each calculation handles one entry. To compare several amounts, erase the fields and run the tool again, or keep a separate list in a spreadsheet.

How can I check that the gross total is right?

Multiply the net amount by the rate to see the expected tax, then compare it with the displayed tax. The gross total should equal the net amount plus that tax.