.calc-wrapper {
background: #f8f9fa;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
margin-bottom: 40px;
border: 1px solid #e9ecef;
}
.calc-title {
text-align: center;
margin-bottom: 25px;
color: #2c3e50;
font-size: 24px;
font-weight: 700;
}
.input-group {
margin-bottom: 20px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #495057;
}
.input-group input {
width: 100%;
padding: 12px;
border: 1px solid #ced4da;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.2s;
}
.input-group input:focus {
border-color: #007bff;
outline: none;
}
.calc-btn {
width: 100%;
padding: 14px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: 600;
cursor: pointer;
transition: background-color 0.2s;
}
.calc-btn:hover {
background-color: #0056b3;
}
.result-box {
margin-top: 25px;
padding: 20px;
background-color: #ffffff;
border-left: 5px solid #28a745;
border-radius: 4px;
display: none;
}
.result-label {
font-size: 14px;
color: #6c757d;
text-transform: uppercase;
letter-spacing: 1px;
}
.result-value {
font-size: 32px;
font-weight: 700;
color: #28a745;
margin: 10px 0;
}
.result-desc {
font-size: 15px;
color: #555;
line-height: 1.5;
}
.article-content h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
}
.article-content h3 {
color: #34495e;
margin-top: 20px;
}
.article-content p, .article-content li {
line-height: 1.6;
font-size: 17px;
color: #444;
}
.article-content ul {
padding-left: 20px;
}
.example-box {
background: #eef2f7;
padding: 15px;
border-radius: 6px;
margin: 15px 0;
}
function calculateAttachmentRate() {
var primaryInput = document.getElementById('primaryUnits').value;
var secondaryInput = document.getElementById('secondaryUnits').value;
var resultBox = document.getElementById('resultBox');
var rateResult = document.getElementById('rateResult');
var rateExplanation = document.getElementById('rateExplanation');
// Validation
if (primaryInput === "" || secondaryInput === "") {
alert("Please enter values for both primary and secondary units.");
return;
}
var primary = parseFloat(primaryInput);
var secondary = parseFloat(secondaryInput);
if (isNaN(primary) || isNaN(secondary)) {
alert("Please enter valid numbers.");
return;
}
if (primary <= 0) {
alert("Primary units sold must be greater than 0 to calculate a rate.");
return;
}
// Calculation Logic
// Attachment Rate = (Secondary Units / Primary Units) * 100
var ratio = secondary / primary;
var percentage = ratio * 100;
// Formatting
// If the number is an integer, show no decimals. If float, show 2 decimals.
var formattedPercentage = Number.isInteger(percentage) ? percentage : percentage.toFixed(2);
var formattedRatio = Number.isInteger(ratio) ? ratio : ratio.toFixed(2);
// Update UI
rateResult.innerHTML = formattedPercentage + "%";
var explanationText = "For every 1 primary unit sold, you are selling approximately " + formattedRatio + " secondary units (add-ons/accessories).";
if (percentage > 100) {
explanationText += "A rate above 100% indicates that customers are buying multiple add-ons per main product.";
} else if (percentage < 100) {
explanationText += "A rate below 100% indicates that not every customer is purchasing an add-on.";
}
rateExplanation.innerHTML = explanationText;
resultBox.style.display = "block";
}
Attachment Rate Calculator
Attachment Rate
0%
How to Calculate Attachment Rate
Attachment rate is a critical metric in sales and marketing, particularly for businesses that rely on cross-selling or selling an ecosystem of products (such as hardware and software, or razors and blades). It measures the frequency at which secondary products (accessories, warranties, subscriptions, or games) are sold in relation to a primary product.
The Attachment Rate Formula
The calculation is straightforward. It compares the volume of secondary unit sales to primary unit sales over a specific period.
Formula:
Attachment Rate = (Secondary Units Sold / Primary Units Sold) × 100
Attachment Rate = (Secondary Units Sold / Primary Units Sold) × 100
Understanding the Variables
- Primary Units: The main driver of the sale (e.g., a gaming console, a smartphone, a printer, or a car).
- Secondary Units: The add-ons attached to that sale (e.g., video games, protective cases, ink cartridges, or extended warranties).
Real-World Examples
Example 1: Gaming Industry
Suppose a company sells 1,000 gaming consoles (Primary). Over the same period, they sell 3,500 video games (Secondary) compatible with those consoles.
- Calculation: (3,500 / 1,000) × 100 = 350%
- Result: An attachment rate of 350%, or 3.5 games per console.
Example 2: Insurance/Warranty
A retailer sells 500 televisions. Of those 500 buyers, 100 choose to purchase the extended warranty plan.
- Calculation: (100 / 500) × 100 = 20%
- Result: A 20% attachment rate for warranties.
Why is Attachment Rate Important?
Tracking this metric helps businesses understand:
- Customer Lifetime Value (CLV): High attachment rates usually mean higher CLV, as customers are spending more within the ecosystem.
- Product Synergy: It indicates how well your accessories fit the needs of your primary product users.
- Sales Performance: It acts as a KPI for sales teams to measure cross-selling effectiveness.
What is a Good Attachment Rate?
A "good" rate varies heavily by industry. In the gaming hardware industry, a rate above 100% (or 1.0) is expected, as users need software to use the hardware. For optional accessories like phone cases or warranties, a rate between 10% and 30% might be considered excellent performance.