Calculate Percentage Growth

Percentage Growth Calculator

Total Percentage Change:

function calculatePercentageGrowth() { var start = parseFloat(document.getElementById('initial_value').value); var end = parseFloat(document.getElementById('final_value').value); var resultDiv = document.getElementById('growth_result'); var container = document.getElementById('growth_result_container'); var summary = document.getElementById('growth_summary'); if (isNaN(start) || isNaN(end)) { alert("Please enter valid numbers in both fields."); return; } if (start === 0) { alert("The Starting Value cannot be zero because growth cannot be calculated from a zero base."); return; } var difference = end – start; var growthPercentage = (difference / Math.abs(start)) * 100; container.style.display = 'block'; resultDiv.innerHTML = growthPercentage.toFixed(2) + "%"; if (growthPercentage > 0) { resultDiv.style.color = "#27ae60"; summary.innerHTML = "This represents an increase of " + Math.abs(difference).toLocaleString() + " units."; } else if (growthPercentage < 0) { resultDiv.style.color = "#e74c3c"; summary.innerHTML = "This represents a decrease of " + Math.abs(difference).toLocaleString() + " units."; } else { resultDiv.style.color = "#2c3e50"; summary.innerHTML = "There was no change in value."; } }

How to Calculate Percentage Growth

Percentage growth is a measure of the relative increase or decrease of a value over time. It is widely used in finance, population studies, and business analytics to track performance trends.

The Percentage Growth Formula

((Ending Value – Starting Value) / |Starting Value|) × 100

Step-by-Step Calculation

1. Identify Values: Determine your starting (initial) value and your ending (final) value.
2. Find the Difference: Subtract the starting value from the ending value. A positive result indicates growth, while a negative result indicates a decline.
3. Divide: Divide that difference by the absolute value of the starting value.
4. Convert to Percent: Multiply the result by 100 to get the percentage growth.

Practical Examples

• Business Revenue: If your store made 1,000 sales last month and 1,250 sales this month, your growth rate is ((1250 – 1000) / 1000) * 100 = 25%.
• Website Traffic: If your blog had 5,000 visitors in January and 4,500 in February, your growth rate is ((4500 – 5000) / 5000) * 100 = -10% (a 10% decrease).
• Social Media: If you started with 200 followers and now have 1,000, your growth rate is 400%.

Why is Growth Calculation Important?

Understanding percentage growth allows you to compare different datasets on equal footing. For instance, an increase of 100 units might be massive for a small business but negligible for a global corporation. Using percentages provides context for the scale of change regardless of the raw numbers.