Percentage Difference Calculator
Calculate relative percentage difference between two positive values.
Last reviewed by the myCalculator Editorial Team
Input Parameters
Calculation Results
Next: related Percentages calculators
Percentage Change Calculator
Compute percentage change, growth rate, and price variations.
Discount & Sale Price Calculator
Compute sale discount percentage savings on retail items.
Tip & Bill Split Calculator
Split restaurant bills and total tip among guests instantly.
Formula & How Percentage Difference Calculator Works
Percentage difference compares two values when neither one is the clear starting point. It divides the absolute difference by the average of the two values: |V1 − V2| ÷ ((V1 + V2) ÷ 2) × 100. For 80 and 120 the difference is 40, the average is 100, and the percentage difference is 40%. This is not the same as percentage change, which treats the first value as the base: going from 80 to 120 is a 50% increase, while going from 120 to 80 is a 33% decrease. Use percentage difference to compare two items side by side, such as quotes from two suppliers, and percentage change when something has moved over time.
- Enter First Value (V1): Input your target parameter value.
- Enter Second Value (V2): Input your target parameter value.
- Apply Formula: Calculate using
Diff % = (|V1 - V2| / ((V1 + V2) / 2)) × 100. - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
Need this calculator for your blog, publication, or client portal?
Get pre-formatted embed codes, Markdown citations for forums (Reddit/Whirlpool), or HTML anchor tags free.
Frequently Asked Questions (FAQs)
When to use percentage difference instead of change?
Use difference when comparing two static values without a clear start or finish.
Embed Percentage Difference Calculator on Your Site
Offer your readers, students, or clients interactive calculations. Fast, responsive, and 100% free with no login required.
Widget Customizer
Recommended for publishers & educational portals to provide source citation.
Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
Open government data, scientific datums, and public sector mathematical reference datasets.
Australia's national authority on physical, chemical, and biological metric measurement standards.
Dedicated Australian home loans, borrowing capacity, mortgage repayments & refinance modeling.