Rate Calculator in Excel

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Excel Growth & Rate Calculator

Calculate Percentage Change and CAGR like a Pro

Calculated Results

Total Percentage Growth: 0%
CAGR (Periodic Rate): 0%

Excel Syntax:
Total Growth: =(End-Start)/Start
Rate (RRI): =RRI(Periods, Start, End)

How to Calculate Rate in Excel

Calculating the rate of growth or the average periodic rate in Excel is a fundamental skill for data analysis, finance, and project management. Whether you are tracking population growth, website traffic, or production efficiency, Excel provides several ways to determine the "Rate."

1. Basic Percentage Change Formula

If you want to know the total percentage increase or decrease between two numbers, the mathematical logic is simple: subtract the old value from the new value, then divide by the old value.

Excel Formula: =(B2 – A2) / A2

Pro Tip: Remember to format the cell as a "Percentage" in the Excel Ribbon to see the result correctly.

2. The RRI Function for CAGR

The RRI function is the easiest way to calculate the Compound Annual Growth Rate (CAGR) in Excel. It returns an equivalent interest rate for the growth of an investment or value over a specific period.

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

Excel Formula: =RRI(nper, pv, fv)

Example Calculation

Suppose you started a project with 1,000 users and after 5 years, you have 2,500 users. To find the annual growth rate:

  1. Initial Value: 1,000
  2. Final Value: 2,500
  3. Periods: 5
  4. Result: Your total growth is 150%, but your annual rate (CAGR) is approximately 20.11%.
function calculateExcelRate() { var start = parseFloat(document.getElementById('startValue').value); var end = parseFloat(document.getElementById('endValue').value); var periods = parseFloat(document.getElementById('periodCount').value); var resultDiv = document.getElementById('rateResult'); if (isNaN(start) || isNaN(end) || isNaN(periods) || start === 0 || periods <= 0) { alert('Please enter valid positive numbers. Starting value cannot be zero.'); return; } // Total Growth Calculation: ((End – Start) / Start) * 100 var totalGrowthPct = ((end – start) / start) * 100; // CAGR / RRI Calculation: ((End / Start)^(1 / Periods) – 1) * 100 var cagr = (Math.pow((end / start), (1 / periods)) – 1) * 100; // Update UI document.getElementById('totalGrowth').innerText = totalGrowthPct.toFixed(2) + '%'; document.getElementById('cagrRate').innerText = cagr.toFixed(2) + '%'; resultDiv.style.display = 'block'; // Apply color coding based on positive or negative growth if (totalGrowthPct < 0) { document.getElementById('totalGrowth').style.color = '#d32f2f'; } else { document.getElementById('totalGrowth').style.color = '#2e7d32'; } if (cagr < 0) { document.getElementById('cagrRate').style.color = '#d32f2f'; } else { document.getElementById('cagrRate').style.color = '#2e7d32'; } }

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