Percentage Calculator

Calculate percentages instantly — find X% of a number, percentage change, or what percent one number is of another.

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Free · Instant · No Signup

Percentage Formula

Formula

Percentage = (Part ÷ Whole) × 100

To find X% of Y: multiply Y by X/100. To find % change: (New−Old)/Old × 100. To find what % A is of B: A/B × 100.

What is 15% of 200?+

15% of 200 = (15/100) × 200 = 30. Use the X% of Y mode above.

How do I calculate percentage increase?+

Percentage increase = ((New Value - Old Value) / Old Value) × 100. Use the % Change mode above.

What is the percentage formula?+

Percentage = (Part ÷ Whole) × 100. For example, 30 out of 200 = (30/200) × 100 = 15%.

Is this percentage calculator free?+

Yes, completely free with no signup required.