.sgr-calculator-wrapper {
max-width: 800px;
margin: 0 auto;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
background: #fff;
border: 1px solid #e2e8f0;
border-radius: 8px;
padding: 20px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.sgr-input-group {
margin-bottom: 20px;
}
.sgr-label {
display: block;
font-weight: 600;
margin-bottom: 8px;
color: #2d3748;
}
.sgr-input {
width: 100%;
padding: 12px;
border: 1px solid #cbd5e0;
border-radius: 6px;
font-size: 16px;
box-sizing: border-box; /* Important for padding */
}
.sgr-input:focus {
border-color: #4299e1;
outline: none;
box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
}
.sgr-button {
background-color: #48bb78;
color: white;
border: none;
padding: 14px 20px;
font-size: 16px;
font-weight: bold;
border-radius: 6px;
cursor: pointer;
width: 100%;
transition: background-color 0.2s;
}
.sgr-button:hover {
background-color: #38a169;
}
.sgr-result-box {
margin-top: 25px;
padding: 20px;
background-color: #f7fafc;
border-radius: 8px;
border-left: 5px solid #4299e1;
display: none;
}
.sgr-result-title {
font-size: 14px;
text-transform: uppercase;
letter-spacing: 1px;
color: #718096;
margin-bottom: 10px;
}
.sgr-result-value {
font-size: 32px;
font-weight: 800;
color: #2d3748;
margin-bottom: 5px;
}
.sgr-result-detail {
font-size: 16px;
color: #4a5568;
}
.positive-growth {
color: #38a169;
}
.negative-growth {
color: #e53e3e;
}
.sgr-content-section {
margin-top: 50px;
line-height: 1.6;
color: #2d3748;
}
.sgr-content-section h2 {
font-size: 24px;
margin-top: 30px;
margin-bottom: 15px;
color: #1a202c;
border-bottom: 2px solid #edf2f7;
padding-bottom: 10px;
}
.sgr-content-section h3 {
font-size: 20px;
margin-top: 25px;
margin-bottom: 12px;
color: #2c5282;
}
.sgr-content-section p {
margin-bottom: 15px;
}
.sgr-content-section ul {
margin-bottom: 20px;
padding-left: 20px;
}
.sgr-content-section li {
margin-bottom: 8px;
}
.formula-box {
background: #ebf8ff;
padding: 15px;
border-radius: 6px;
font-family: monospace;
font-size: 16px;
text-align: center;
margin: 20px 0;
border: 1px dashed #4299e1;
}
function calculateSalesGrowth() {
var priorInput = document.getElementById('priorSales').value;
var currentInput = document.getElementById('currentSales').value;
// Validation
if (priorInput === "" || currentInput === "") {
alert("Please enter both Prior Period Sales and Current Period Sales.");
return;
}
var prior = parseFloat(priorInput);
var current = parseFloat(currentInput);
if (isNaN(prior) || isNaN(current)) {
alert("Please enter valid numeric values.");
return;
}
var resultBox = document.getElementById('resultBox');
var rateDisplay = document.getElementById('growthRateResult');
var absDisplay = document.getElementById('absChangeResult');
var interpretation = document.getElementById('interpretation');
// Logic
var absoluteChange = current – prior;
var growthRate = 0;
var isInfinity = false;
// Handle division by zero
if (prior === 0) {
if (current > 0) {
isInfinity = true; // Infinite growth
} else if (current === 0) {
growthRate = 0; // 0 to 0 is 0%
} else {
// 0 to negative? Rare in sales revenue but math logic handles it
isInfinity = true;
}
} else {
growthRate = (absoluteChange / prior) * 100;
}
// Display Settings
resultBox.style.display = "block";
// Format Absolute Change as Currency
var currencyFormatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
});
absDisplay.innerHTML = currencyFormatter.format(absoluteChange);
// Styling based on result
if (isInfinity) {
rateDisplay.innerHTML = "∞ (Infinite)";
rateDisplay.className = "sgr-result-value positive-growth";
interpretation.innerHTML = "Sales have started from zero. This represents infinite percentage growth.";
} else {
rateDisplay.innerHTML = growthRate.toFixed(2) + "%";
if (growthRate > 0) {
rateDisplay.className = "sgr-result-value positive-growth";
absDisplay.style.color = "#38a169";
interpretation.innerHTML = "Congratulations! Your sales have increased compared to the prior period.";
} else if (growthRate < 0) {
rateDisplay.className = "sgr-result-value negative-growth";
absDisplay.style.color = "#e53e3e";
interpretation.innerHTML = "Sales have decreased. Review your strategy to address the decline.";
} else {
rateDisplay.className = "sgr-result-value";
absDisplay.style.color = "#4a5568";
interpretation.innerHTML = "Sales have remained exactly the same.";
}
}
}
function resetCalculator() {
document.getElementById('priorSales').value = '';
document.getElementById('currentSales').value = '';
document.getElementById('resultBox').style.display = 'none';
}
Understanding Sales Growth Rate
The Sales Growth Rate is a critical performance metric (KPI) used by businesses to measure the percentage increase or decrease in revenue over a specific period. Whether you are tracking Month-over-Month (MoM), Quarter-over-Quarter (QoQ), or Year-over-Year (YoY) performance, understanding this metric is essential for strategic planning, forecasting, and gauging the health of your company.
A positive growth rate indicates that your sales strategies are working and the business is expanding. Conversely, a negative growth rate alerts management to potential issues in the sales funnel, market conditions, or product competitiveness.
The Formula
The calculation is straightforward. It compares the revenue generated in the current period against the revenue generated in a previous period.
((Current Sales – Prior Sales) / Prior Sales) × 100 = Sales Growth Rate (%)
Input Definitions
- Prior Period Sales: The total revenue (or unit sales) generated in the baseline period (e.g., Last Year's Q1 sales).
- Current Period Sales: The total revenue generated in the specific period you are analyzing (e.g., This Year's Q1 sales).
Step-by-Step Calculation Example
Let's say you want to calculate the Year-over-Year growth for a retail store.
- Last Year's Revenue (Prior): $50,000
- This Year's Revenue (Current): $65,000
Step 1: Determine the absolute difference.
$65,000 – $50,000 = $15,000 increase.
Step 2: Divide by the prior period.
$15,000 / $50,000 = 0.30
Step 3: Convert to percentage.
0.30 × 100 = 30%
The business experienced a 30% sales growth rate.
Why is Sales Growth Rate Important?
Investors, executives, and small business owners rely on this metric for several reasons:
- Trend Analysis: It helps identify seasonal trends or long-term shifts in consumer behavior.
- Forecasting: Historical growth rates are the foundation for projecting future revenue and setting budgets.
- Benchmarking: It allows you to compare your performance against industry standards or competitors.
- Valuation: For startups and public companies, high sales growth rates often lead to higher company valuations.
Interpreting the Results
Positive Growth
Generally seen as a sign of health. However, rapid growth (hypergrowth) can sometimes strain operations, inventory, and cash flow. It is important to ensure that sales growth is profitable and sustainable.
Negative Growth (Contraction)
A decline in sales isn't always a disaster—it could be due to seasonal factors or a deliberate shift in strategy (e.g., dropping low-margin products). However, consistent negative growth requires immediate investigation into pricing, marketing effectiveness, and customer retention.
Zero Baseline Limitation
If your prior period sales were $0 (for example, if you are a new startup), the standard growth rate formula cannot be calculated mathematically (division by zero). In this scenario, you look at absolute revenue numbers rather than percentages.