GST/Tax Calculator
Calculate GST, VAT, and sales tax amounts instantly. Choose between tax-inclusive and tax-exclusive calculations with step-by-step explanations for better understanding.
➕ Add Tax (Exclusive)
Calculate tax amount and final price when tax is added to the base amount.
➖ Remove Tax (Inclusive)
Calculate original amount and tax when the total already includes tax.
Common Tax Rates (Click to Use)
How to Use the GST/Tax Calculator
Choose Calculation Mode
Select "Add Tax" if you want to calculate tax on a base amount (tax-exclusive), or "Remove Tax" if your amount already includes tax (tax-inclusive) and you want to find the original amount.
Enter Amount & Tax Rate
Input your amount in the currency field and enter the tax rate percentage. Use the common tax rate buttons for quick selection, or enter any custom rate between 0% and 100%.
Get Instant Results
Click Calculate to see the tax amount and final price instantly. The calculator shows separate cards for the original amount, tax amount, and total with tax for clear understanding.
View Detailed Breakdown
Review the step-by-step calculation showing the formula used and each calculation step. Use the Reset button to clear all fields and start a new calculation.
Frequently Asked Questions
What's the difference between tax-inclusive and tax-exclusive calculations?
+Tax-exclusive means the tax is added to the base amount (e.g., $100 + 10% = $110). Tax-inclusive means the total already includes tax, and you need to find the original amount (e.g., $110 includes 10% tax, so the base amount is $100). Our calculator handles both scenarios automatically.
How do I calculate GST backwards from a total amount?
+Use the "Remove Tax" mode. Enter the total amount that includes GST and the GST rate. The calculator will show you the original amount before GST and the GST amount. For example, if you have $110 total with 10% GST, the original amount is $100 and GST is $10.
Can I use this calculator for different types of taxes like VAT or sales tax?
+Yes! This calculator works for any percentage-based tax including GST, VAT, sales tax, service tax, and more. Simply enter the appropriate tax rate for your region or transaction type. The calculation method remains the same regardless of the tax name.
What are the common GST rates in different countries?
+GST rates vary by country: Australia (10%), Canada (5-15%), India (5%, 12%, 18%, 28%), New Zealand (15%), Singapore (7%). VAT rates in Europe typically range from 17-27%. Our calculator includes common rates as quick-select buttons, but you can enter any custom rate.
How accurate are the calculations for business accounting purposes?
+Our calculator uses precise mathematical formulas and handles decimal places accurately, making it suitable for business calculations. However, always verify important financial calculations with your accounting software or tax professional, especially for official tax filings and business records.