YoY Calculator (Year over Year Growth%)

Calculates the percentage difference in a specified metric between two comparable time periods, usually one year apart.

Input the initial and final values.

(Typically one from this year and one from last year).

It calculates the percentage change between the two numbers.

@Author

What if they’re not a year apart?

@Reader

Doesn’t matter for the calculator!

It simply gives you the raw change between the values regardless of when they occurred.

@Author

YoY Growth Formula

YoY is a way to measure the percentage change in a value, comparing it to the same period typically one year ago. Which is helpful for tracking trends and performance that might be affected by seasonal variations.

YoY = [(Final - Initial) / Initial] * 100

Initial Value: is the value from the previous year’s period that you are comparing against.
Final Value: is the value for the current period you are interested in.
We multiply the result by 100 to convert the proportion (which is a decimal or fraction) into a percentage.

Example

Let’s say Initial Value (Sales Last Year): $100,000. Final Value (Sales in This Year): $120,000. Using the formula:

YoY = [($120,000 – $100,000) / $100,000] * 100
YoY = [($20,000) / $100,000] * 100
YoY = [0.2] * 100
YoY = 20%

Benefits of Year-over-year (YoY)

YoY Calculator helps in identifying long-term trends and patterns.
It provides a clear picture of how a company or metric is performing compared to the previous year.
YOY adjusts for seasonal variations.

YOY is commonly applied to financial metrics such as revenues, profits, and other business performance indicators.

What’s the Difference Between YoY and YtD?

YOY Compares metrics from one year to the same period in the previous year. YTD (Year-To-Date) Compares metrics from the start of the current year to the same date in the previous year.

For less that a year there are:

Month-Over-Month (MOM): Compares metrics from one month to the previous month.
Quarter-Over-Quarter (QOQ): Compares metrics from one quarter to the previous quarter.