Daily Figures Edition No Sign-Up • Free Forever Vol. XII — No. 204
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Percentage Increase Calculator

Increase a value by a percentage to get the new value and the amount added.

Filed by The Statistics Desk  |  Method: start × (1 + percent)
New value
—
After the increase.
Also
Amount added—
Starting value—
Percent used—
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How the Percentage Increase Calculator Works

To increase a number by a percentage, work out the percentage of the starting value and add it on. This calculator multiplies your starting value by the percentage to get the amount added, then adds that to the original to give the new value — useful for markups, raises, tax, tips and price rises.

A shortcut gives the same answer in one step: multiply by (1 + percent ÷ 100). Increasing 80 by 15% is 80 × 1.15 = 92.

new = start × (1 + percent ÷ 100)

Frequently Asked Questions

How do I increase a number by a percentage?

Multiply the number by the percentage to get the amount to add, then add it. For example, 80 increased by 15% is 80 + (80 × 0.15) = 92. Or multiply directly by 1.15.

What is the quick way to add a percentage?

Multiply by 1 plus the percentage as a decimal. A 15% increase means × 1.15; a 7% increase means × 1.07.

How is this different from percent change?

Here you know the percentage and want the new value. Percent change works the other way — you know the old and new values and want the percentage between them.

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