Add or remove tax from any amount using a custom tax rate — a general-purpose tax calculator that works for any country's sales tax, GST or VAT.
How It's Calculated
Add Tax: amount after tax = amount × (1 + tax rate ÷ 100). Remove Tax: amount before tax = amount ÷ (1 + tax rate ÷ 100). In both modes, the tax amount is simply the difference between the before-tax and after-tax figures.
Real Example
Example: adding a 10% tax to $200 gives $220, with a tax amount of $20. Removing a 10% tax from a $220 total gives $200 before tax, with the same $20 tax amount.
Notes & Limitations
This is a general-purpose tax calculator for any tax rate and any country — sales tax, GST, VAT, or any other percentage-based tax. For a dedicated Turkish VAT (KDV) calculator with standard rate presets, use the VAT Calculator instead.
Last updated: July 25, 2026
Frequently Asked Questions
Enter the amount before tax and your tax rate, then choose "Add Tax." The calculator multiplies the amount by (1 + rate/100) to give you the total including tax.