How to Calculate the Average Growth Rate in Excel

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Average Growth Rate (CAGR) Calculator

Calculate the Compound Annual Growth Rate for any timeframe

The Average Growth Rate is:
0%

How to Calculate Average Growth Rate in Excel

Calculating the average growth rate is essential for understanding performance over time, whether you are analyzing business revenue, stock prices, or website traffic. In Excel, the most accurate way to calculate this is using the Compound Annual Growth Rate (CAGR) formula.

Method 1: Using the RRI Function (Simplest)

The RRI function returns an equivalent interest rate for the growth of an investment. It is the most direct way to find the average growth rate in modern versions of Excel.

=RRI(nper, pv, fv)
  • nper: The number of periods (years, months, etc.).
  • pv: The present value (starting amount).
  • fv: The future value (ending amount).

Method 2: The Manual Formula

If you prefer to understand the math behind the calculation, you can use the mathematical formula for CAGR directly in a cell:

=((Ending_Value / Starting_Value)^(1 / Periods)) – 1

Example Scenario

Suppose you had the following data:

Data Point Value
Initial Users (2018) 10,000
Current Users (2023) 25,000
Time Elapsed 5 Years

The Excel formula would be =RRI(5, 10000, 25000), which results in 20.11%. This means your user base grew by an average of 20.11% every year for five years.

Important Tips

  • Ensure your Starting Value is never zero, as this will cause a #NUM! or #DIV/0! error.
  • The number of periods should be the total gaps between data points (e.g., from 2020 to 2025 is 5 periods, even though there are 6 years of data).
  • Format the result cell as a "Percentage" in Excel for easier reading.
function calculateGrowthRate() { var start = parseFloat(document.getElementById('startingValue').value); var end = parseFloat(document.getElementById('endingValue').value); var nper = parseFloat(document.getElementById('periods').value); var resultArea = document.getElementById('resultArea'); var finalRate = document.getElementById('finalRate'); var resultText = document.getElementById('resultText'); if (isNaN(start) || isNaN(end) || isNaN(nper) || nper <= 0 || start <= 0) { alert("Please enter valid positive numbers. Starting value and periods must be greater than zero."); return; } // CAGR Formula: ((FV / PV)^(1 / n)) – 1 var growthRate = (Math.pow((end / start), (1 / nper)) – 1) * 100; finalRate.innerHTML = growthRate.toFixed(2) + "%"; resultText.innerHTML = "Based on a starting value of " + start + " and an ending value of " + end + " over " + nper + " periods."; resultArea.style.display = 'block'; }

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