This free online calculator helps you quickly add or subtract a percentage from any amount. It's perfect for calculating discounts, adding VAT, or adjusting prices based on markup or tax rates. Simply enter the original amount, the percentage, and select whether to add or subtract — it does the math instantly.
Clean interface, quick answers — plus a few unobtrusive ads to help keep this tool free forever.
Enter your original amount (e.g. 100), enter 10 as the percentage, and select “Add %”. The tool will calculate the new total, including the added percentage.
To remove VAT, enter the full amount and the VAT rate (e.g. 20%), then choose “Subtract %”. The tool will show the original value before VAT.
Yes, it's perfect for calculating discounts. Enter the price and discount percentage, then subtract it using the tool.
Absolutely. You can use it to apply or remove markups just like VAT or discounts — it works for any percentage adjustment.
Simply multiply the number by the percentage as a decimal. For example, 20% of 50 is 50 Ă— 0.20 = 10. This tool automates that for you instantly.
Yes, just enter the base amount and the tax rate, then select “Add %” to get the final total including tax.
Enter the increased amount and the same percentage, but choose “Subtract %” to estimate the original value before the increase.
This calculator is ideal for quick percentage math and works well for invoices, retail pricing, and budgeting, but it is not a replacement for financial or legal advice.
Yes! You can enter decimal percentages like 7.5 or 2.25, and the calculator will handle them accurately.