Percentage Increase Calculator
Last updated: July 2026
Calculate percentage increase or decrease, absolute change and change factor between two values.
Percentage change
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- Absolute change: —
- Change factor: —
- Direction: —
On this page
Quick summary: Calculate percentage increase or decrease, absolute change and change factor between two values. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator estimates
Calculate percentage increase or decrease, absolute change and change factor between two values. It is designed for fast planning and comparison in the United States. The output is an estimate, not a binding quote, approval, tax determination, insurance offer, legal conclusion, medical recommendation or professional advice.
How to use it
Enter the requested values using a single consistent time period and currency. Select Calculate, review the headline result and supporting figures, then change one assumption at a time to compare another scenario.
How the calculation works
Percentage change is the difference between the new and original values divided by the absolute original value.
Important limitations
An original value of zero has no defined percentage change.
Frequently asked questions
Is the result exact?
No. It is a planning estimate based on the assumptions entered.
Can I compare different scenarios?
Yes. Change one input at a time so you can see which assumption changes the result.
Does the calculator store my inputs?
The calculation runs in the browser and does not require an account. Avoid entering unnecessary confidential information.