TOOLOG / WEB UTILITY
VAT Calculator | Custom Rate, Net-to-Gross & Reverse VAT
Calculate or reverse-calculate VAT from net price or gross total with a custom 0–100% tax rate and selectable whole-unit rounding.
Try the tool
Enter your details below. Results update instantly.
Enter a non-negative whole-unit amount.
The default rate is 10%; enter 0–100% with up to three decimal places. For gross-total calculations, net price is rounded first and VAT is the remaining amount so the total always matches.
VAT calculator for net-to-gross and gross-to-net checks
This free VAT calculator calculates VAT and gross total from a net price, or reverse-calculates net price and VAT from a VAT-inclusive gross total. Use the default 10% or enter a custom 0–100% rate, then select round, floor, or ceil for whole-unit handling.
Supported modes
- Net-based: net price → VAT + gross total
- Gross-based: gross total → net price + VAT
- Custom VAT rate: 10% by default, or 0–100% with up to three decimal places
- Whole-unit handling: round, floor, or ceil
- Copy results: copy a summary of net price, VAT, and gross total
How to use
1. Choose the calculation basis
Select net-based mode when you know the pre-tax amount, or gross-based mode when you know the VAT-inclusive total.
2. Enter the amount
Enter a whole number of zero or more. Results update automatically.
3. Choose rounding and review the result
Enter the applicable VAT rate, choose round, floor, or ceil to match your settlement policy, then review the net price, VAT, and gross total. In gross-based mode, the calculator handles the net price first and assigns the remaining difference to VAT so the entered total stays unchanged.
Typical use cases
- Invoice and quotation drafting
- Payment reconciliation
- Sharing clear tax breakdown with partners
Related tools
- Check the percentage itself: Percent Calculator
- Compare selling price and margin: Profit Margin Calculator
- Verify a discounted price: Discount Calculator
FAQ
What is the difference between net-based and gross-based calculation?
The starting amount is different. Confirm whether you are entering a pre-tax net price or a VAT-inclusive gross total.
Can I calculate a VAT rate other than 10%?
Yes. The default is 10%, and you can enter a rate from 0% to 100% with up to three decimal places. Check the applicable rules and documents separately for zero-rated, exempt, or different-rate transactions.
How are fractional amounts handled?
Choose round, floor, or ceil to match your settlement policy. Before issuing an invoice or signing a contract, confirm the counterparty’s rounding rule and final amount.
Summary
Use the VAT calculator to split net price, VAT, and gross total quickly, compare whole-unit rounding methods, and reduce amount errors in invoices and settlements.