Work & Business · How to use
VAT, GST & Sales Tax Calculator
Follow the steps to enter your numbers and check the limits.
Updated 2026-10-25 · ThinkVault Tools
Get started in three steps
- 1
Step 1
Prepare your amounts, terms and applicable rates or prices.
- 2
Step 2
Open the tool, check the units and compare scenarios.
- 3
Step 3
Read the results and notes. Check official documents and sources before deciding.
Method and common questions
Purpose and inputs
Add a user-specified tax or extract it from a gross amount, showing net, tax and gross.
Method and assumptions
Add mode: gross=net×(1+rate/100). Extract mode: net=gross/(1+rate/100). Tax is the difference. The chosen rate and shortcut values do not assert current law in any jurisdiction. Compound taxes, exemptions and line-by-line rounding are excluded.
FAQ
- What are the limitations?
- User-defined rate; shortcuts do not declare current tax law.
Method
Add mode: gross=net×(1+rate/100). Extract mode: net=gross/(1+rate/100). Tax is the difference. The chosen rate and shortcut values do not assert current law in any jurisdiction. Compound taxes, exemptions and line-by-line rounding are excluded.
Last checked: 2026-10-19
Before you begin
Tax, lending, holiday and protection rules vary by place and date. Check current local rules and provider terms. Results are estimates.