Question 1

What is percentage difference?

Accepted Answer

Difference between values divided by their average × 100. For 80 and 100: |100-80|/((80+100)/2) × 100 = 22.2%.

Question 2

When do I use percentage difference vs change?

Accepted Answer

Use change when comparing to a base value. Use difference when neither value is the baseline (comparing two options).

Question 3

How accurate are these calculations?

Accepted Answer

Our calculator uses double-precision floating-point arithmetic, accurate to about 15-16 significant digits for most calculations.

Question 4

Can I use the result in further calculations?

Accepted Answer

Yes, results are calculated to full precision. You can copy the exact value or use the rounded display depending on your needs.

Percentage Difference Calculator

Frequently Asked Questions