VAT & Reverse Sales Tax Calculator
Gross-to-Net & Net-to-Gross Breakdown • Multi-Region Compliance
🧾 VAT & Sales Tax Calculator
Tax Amount
$20.00
Gross Amount (Incl. Tax)
$120.00
🛡️ 100% Client-Side Privacy Protection
All financial calculations and numerical conversions execute strictly within your local browser JavaScript engine. No figures or queries are ever transmitted over the network.
⚡ Instant Zero-Latency Execution
Direct IEEE-754 floating point arithmetic with zero server roundtrip latency for immediate reactive feedback.
Mathematical Specifications & Technical FAQ
How do I reverse calculate tax from a gross total?
Net Amount = Gross / (1 + Tax Rate / 100), and Tax Due = Gross - Net.
What is the standard formula for forward sales tax?
Gross = Net * (1 + Tax Rate / 100), and Tax Due = Net * (Tax Rate / 100).
Can custom tax rates be entered?
Yes, any percentage (e.g. 7.5%, 19%, 20%, 21%) can be entered with instant computation.