Percentage Calculator

Percent

Calculate a percentage of a value, what percent one value is of another, and percentage increases or decreases.

Find a % of a value

Example: calculate 15% of 80,000.

Base value Percent

Enter values to calculate. Base value × percent ÷ 100

Value after % increase/decrease

Example: calculate the value after increasing or decreasing 120 by 15%.

Base value Change rate (%)

Enter values to calculate. Base value × (1 ± change rate ÷ 100)

Part as % of whole

Example: calculate what percent 30 is out of 120.

Whole value Part value

Enter values to calculate. Part value ÷ whole value × 100

Increase/decrease rate

Example: calculate the growth rate from 120 to 156.

Previous value Current value

Enter values to calculate. (Current value - previous value) ÷ previous value × 100

When to use this calculator

Calculate a percentage of a value, what percent one value is of another, and percentage increases or decreases.

Checking discounts, score shares, or progress against a total
Comparing an old value with a new value
Finding a value after a planned percentage change

Worked examples

Part of a whole

30 out of 120 is 30 ÷ 120 × 100 = 25%.

Percent of a value

15% of 80,000 is 80,000 × 0.15 = 12,000.

Growth rate

A change from 120 to 156 is a 30% increase.

Frequently asked questions

Are percent and percentage the same?

Percentage describes a share out of 100, while the percent sign is the symbol used to express it.

What should be used as the base?

Use the original or whole value as the denominator. Choosing the wrong base is the most common source of errors.

Is a five percentage-point increase the same as a 5% increase?

No. A move from 10% to 15% is five percentage points but a 50% increase relative to 10%.

How to interpret the result

Results are rounded for display, while calculations use the full numeric value.

For money or official statistics, confirm the required rounding rule before using the result.