Adding a percentage
Multiply the amount before tax by your rate, then add the tax to the original amount.
net × (1 + rate ÷ 100)
Calculator with tax
Add VAT, GST or sales tax, or work backwards from a total. See every number, every step.
Your calculations stay on your device
Enter the rate applicable to your transaction. No official rate is applied automatically. The initial 10% is an illustrative manual input, not an official country rate.
Before tax
Original amount
Tax amount%
Calculated from your rate
Total including tax
Before tax + tax amount
1,000.00 + 100.00 = 1,100.00 GBP
Sources & country guide (EN)
This calculator uses your entered rate. Explore the dedicated country calculators below for reference treatments. Selecting a currency does not convert amounts.
UK VAT calculator (EN)Australia GST calculator (EN)Where the total goes
1,100.00 GBPBefore tax90.91%Tax amount9.09%
See the calculation
The calculation, step by step
Manual example: amounts rounded to 2 decimal places, half up. Legal rounding rules can differ.
Try another amount
Compare amounts
| Input amount | Tax amount | Total including tax |
|---|
This calculator handles a single percentage you enter. It does not determine the legal rate, taxability, exemptions or combined local taxes.
Official tax references
ONE PLATFORM. TWENTY COUNTRIES.
Find your country
Choose a currency and local tax context. All calculations currently use a rate you enter.
No matching countries.
20 / 20 countries shown
A LITTLE CLARITY GOES A LONG WAY.
Know what is in your total.
Finding the amount before tax
Divide the total by one plus your rate. Subtract that amount from the total to find the included tax.
total ÷ (1 + rate ÷ 100)
A clear line between arithmetic and tax advice.
A formula calculates tax; it does not decide which treatment applies. Check the official references and calculation limits for your transaction.
Sources & country guide (EN)Read our calculation methodology