VAT / GST Calculator — Add or Extract Tax
Add VAT/GST to a net amount or extract tax from a gross amount. Sample: net 100 at 20% → gross 120. Enter your own rate — no country tax matrix. Browser-only Calculate VAT/GST add or extract with your rate; example net 100 at 20% → gross 120.
How it works
Choose add or extract, enter amount and rate. No per-country rate pages — you supply the percent.
Formula
Gross = net × (1+r); net = gross / (1+r); tax = gross − net. Notes:
- r is a decimal from the percent you enter.
- Multi-rate invoices and exemptions are not modeled.
- Not a filing or compliance tool.
Example
Example: net 100, 20% → gross 120, tax 20.
When to use it
- Homework VAT add/extract.
- Quick check before bookkeeping.
- Pair with discount/tip pages for receipt math.
Frequently asked questions
Sample?
Net 100 at 20% → gross 120.
Country rates?
Enter your rate; we do not ship a matrix.
Filing help?
No — educational arithmetic only.
GST vs VAT?
Same add/extract math; labels differ by region.
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Questions or feedback
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