Increase any number by a percentage in one step.
New Total
230
That's 200 + 30 added.
This tool does the increase and the addition in one step — instead of first working out "what is 15% of 200" and then manually adding it to 200, you get the final increased number directly.
This is the everyday calculation behind adding a tip to a restaurant bill, applying a markup to a wholesale price, or adding service tax on top of a base amount.
Formula
Result = Number × (1 + Percentage ÷ 100)
This gives the new, increased total directly — no separate addition step needed.
Worked Example
Worked example
Restaurant tips, made simple
To add a 10% tip to a ₹640 bill, this tool gives you ₹704 directly in one step, rather than working out 10% of ₹640 (₹64) and then adding it manually.
Stacking multiple percentages
Be careful when applying two percentages in a row — like a markup followed by a tax — because the second percentage applies to the already-increased number, not the original. Run this calculator twice in sequence for an accurate stacked result.
Frequently Asked Questions
How do I add a percentage to a number?
Multiply the number by (1 + the percentage as a decimal). Adding 20% to 150 is 150 × 1.20 = 180.
Is this the same as a percentage increase calculator?
Related but different — the Percentage Increase Calculator finds the percentage between two known numbers. This tool goes the other way: you already know the percentage and want the new total.
How do I add two percentages, like a markup and then tax?
Apply them one at a time — add the markup first to get an intermediate number, then add the tax percentage to that intermediate number, not to the original.
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