Add the requested inputs
Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Money & business · Free online tool
Percentage difference calculator
Compare two values with a symmetric percentage difference and absolute difference. Measure how far two values differ relative to their average, without treating one value as the baseline.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Percentage difference calculator workspace
Runs locally in your browser
This is a symmetric comparison, not a directional increase or decrease.
Result
Percentage difference—
Absolute difference—
Average of magnitudes—
Direction—
Comparison summary
Use it with confidence
How to use the percentage difference calculator.
Calculate and review
Use the main action when needed. Percentage difference = |a − b| ÷ ((|a| + |b|) ÷ 2) × 100, using absolute values so the denominator stays positive.
Try a worked example
Comparing 100 and 80 gives a percentage difference of about 22.2% relative to the average of the two values.
Check the assumptions
This is a symmetric comparison, not a directional increase or decrease. Use percentage change when an old value is the baseline, and check the zero-average case explicitly.
Helpful answers
Percentage difference calculator FAQs.
Is the percentage difference calculator free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this percentage difference calculator work?
Percentage difference = |a − b| ÷ ((|a| + |b|) ÷ 2) × 100, using absolute values so the denominator stays positive.
What should I check before using the result?
This is a symmetric comparison, not a directional increase or decrease. Use percentage change when an old value is the baseline, and check the zero-average case explicitly.