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Percentage calculator

Find what percent one number is of another, or the increase or decrease between two values, with the formula shown so you can check the result.

EV-T01

Find the percentage.

Answer “what percent is this?” or measure a percentage change with the same two values.

Formula and assumptions: Part ÷ whole × 100. Percentage change uses (ending − starting) ÷ |starting| × 100; a zero denominator is undefined.

READYEnter a scenario, then calculate.
Method reference: NIST SI unit guidance ↗

COMMON WAYS TO ASK

QUICK ANSWER

What this calculator tells you.

Use part ÷ whole for a share, or compare an ending value with its starting value for a signed change. The calculator keeps those two questions separate.

WORKED EXAMPLE

45 is what percent of 60?

INPUTPart 45 · whole 60
RESULT45 ÷ 60 × 100 = 75%
CHECK THE EDGE CASES

Questions people ask next.

What is the difference between percentage and percentage points?

A percentage describes a share or relative change. Percentage points describe the direct gap between two percentage values, such as 20% to 25% being 5 percentage points.

Why is percentage change undefined from zero?

Percentage change divides by the starting value. When that value is zero there is no finite denominator, so reporting a percentage would be misleading.

CONTINUE CALCULATING

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