Example 1 — Service quote at 23%
- Direction: net → gross
- Net amount: 1000
- Rate: 23%
Tax 230
Gross 1230
Typical pre-tax quote: the client pays 1230, while your invoice lines show net 1000 plus tax 230.
VAT / sales tax — net, tax and gross
Type in an amount and a rate, and we'll do the rest — either direction, net to gross or gross to net. You'll always see all three numbers side by side.
We split your amount into net, tax, and gross at whatever rate you pick — handy for quotes, invoices, or reversing a total off a receipt. It's pure rate arithmetic, with no tax ID, filing period, or jurisdiction rules attached. The presets (23/8/5/0) are just common example rates — swap in whatever applies where you are. Change currency in the header if you need another one.
Result
Enter data and click Calculate.
How results are calculated
The formula depends on which way you're converting:
Net → gross: tax = net × rate/100; gross = net + tax.
Gross → net: net = gross ÷ (1 + rate/100); tax = gross − net.
How to use the calculator
- Choose direction: net → gross or gross → net.
- Enter the amount in the header currency.
- Set the tax rate (%) — optional presets help for 23/8/5/0.
- Click Calculate or watch the live result as you type.
- Use the stacked bar diagram to compare net, tax, and gross.
Usage examples
Example 2 — Reverse from gross
- Direction: gross → net
- Gross amount: 2460
- Rate: 23%
Net 2000
Tax 460
When you only know the payable total, dividing by 1.23 separates the base from the tax wedge.
Example 3 — Reduced 8% rate
- Direction: net → gross
- Net amount: 500
- Rate: 8%
Tax 40
Gross 540
At a reduced rate the gross–net gap shrinks — useful before comparing “tax included” vs “tax excluded” offers.
FAQ
How do net and gross differ with VAT/sales tax?
Net is the amount before the tax is added. Gross = net + tax. Invoices usually show all three: net, tax amount, and gross payable.
When should I start from net vs gross?
Use net → gross when you know the pre-tax price. Use gross → net when you only have the total on a receipt or quote.
Can I use a rate other than 23%?
Yes. The rate field is free-form. The optional presets are convenience shortcuts for common example rates; change them anytime to match your jurisdiction.
Does 0% mean no tax?
Mathematically yes: tax = 0 and gross = net. Legally, a 0% rate and a full exemption are different regimes — this tool only does the arithmetic.
How do I recover net from a gross amount?
Net = gross ÷ (1 + rate/100). At 20%, divide by 1.20. Tax is gross − net.
Is this a bookkeeping tool?
Not really — it's just a quick amount converter. Filing, invoices, and tax returns call for real accounting software or a professional; there's no invoice date, tax ID, or transaction type here.
Where does the currency come from?
Calcboxer sticks to one currency across the whole page, so switching it in the header instantly reformats the result — no mixing PLN and EUR in the same view.
What else is useful alongside this?
Net ↔ gross pay for take-home estimates, simplified income tax for annual brackets, and the emergency fund for cash buffers.