Percent Change & CAGR
Calculate percent change between two values and CAGR over a number of periods
About this calculator
The Percent Change & CAGR Calculator measures how a value moved between two points: the absolute change, the percent change relative to the starting value, and — when you supply a number of periods with positive start and end values — the compound annual growth rate. It labels the move as an increase or decrease, returns null CAGR when the math is undefined (sign crossings or zero periods), and rejects a zero starting value where percent change has no meaning.
How to use the Percent Change & CAGR calculator
- Enter your amounts, rates and terms into the input fields.
- Read the result — it updates instantly as you type.
- Adjust the inputs to compare scenarios side by side.
- Copy the page URL to share the exact calculation.
Common examples
- 80 → 100: +20 absolute, +25.00% change
- 150 → 120: −30 absolute, −20.00% decrease
- 10,000 → 16,000 over 5 years: +60.00% total, CAGR 9.86% per year
- 50 → 75 over 3 periods: +50.00% total, CAGR 14.47%
Frequently asked questions
How does the Percent Change & CAGR calculator work?
Enter your amounts, rates and terms, and the calculator applies the standard financial formulas to show the outcome, including intermediate figures where they help you understand the result. All arithmetic runs at high precision, so rounding errors do not build up across periods.
When would I use the Percent Change & CAGR calculator?
Use it when planning a purchase, loan, investment or budget, to compare options before committing, or to sanity-check figures quoted to you. It is an educational tool, not financial advice — confirm important decisions with your provider or a professional.
How accurate are the results?
The formulas are the standard ones used in finance and run at 30 significant digits internally. Real products may differ in fees, compounding conventions and rounding rules, so treat the result as a close estimate rather than a contractual figure.
Can I share a specific calculation with someone else?
Yes. Every value you enter updates the URL, so copying the address bar and sharing the link reopens the exact same calculation for whoever clicks it.