Feet Inches Calculator

Feet and Inches Converter

Use this calculator to convert a measurement in feet and inches into total inches, total feet (decimal), and total centimeters.

Conversion Results:

Total Inches:

Total Feet (Decimal):

Total Centimeters:

function calculateFeetInches() { var inputFeet = document.getElementById('inputFeet').value; var inputInches = document.getElementById('inputInches').value; var feet = parseFloat(inputFeet); var inches = parseFloat(inputInches); if (isNaN(feet) || isNaN(inches) || feet < 0 || inches < 0) { document.getElementById('totalInchesResult').innerText = 'Please enter valid positive numbers.'; document.getElementById('totalFeetDecimalResult').innerText = ''; document.getElementById('totalCentimetersResult').innerText = ''; return; } // Calculate Total Inches var totalInches = (feet * 12) + inches; // Calculate Total Feet (Decimal) var totalFeetDecimal = feet + (inches / 12); // Calculate Total Centimeters (1 inch = 2.54 cm) var totalCentimeters = totalInches * 2.54; document.getElementById('totalInchesResult').innerText = totalInches.toFixed(2) + ' inches'; document.getElementById('totalFeetDecimalResult').innerText = totalFeetDecimal.toFixed(2) + ' feet'; document.getElementById('totalCentimetersResult').innerText = totalCentimeters.toFixed(2) + ' cm'; } // Run calculation on page load with default values window.onload = calculateFeetInches; .feet-inches-calculator-container { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f9f9f9; padding: 25px; border-radius: 10px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); max-width: 600px; margin: 30px auto; border: 1px solid #e0e0e0; } .feet-inches-calculator-container h2 { color: #333; text-align: center; margin-bottom: 20px; font-size: 28px; } .feet-inches-calculator-container p { color: #555; line-height: 1.6; margin-bottom: 15px; text-align: center; } .calculator-form .form-group { margin-bottom: 15px; display: flex; align-items: center; justify-content: center; } .calculator-form label { flex: 1; color: #444; font-weight: bold; margin-right: 10px; text-align: right; font-size: 16px; } .calculator-form input[type="number"] { flex: 2; padding: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 16px; width: calc(100% – 120px); /* Adjust width considering label */ max-width: 200px; } .calculator-form input[type="number"]:focus { border-color: #007bff; box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25); outline: none; } .calculate-button { display: block; width: 100%; padding: 14px 20px; background-color: #007bff; color: white; border: none; border-radius: 6px; font-size: 18px; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; margin-top: 20px; } .calculate-button:hover { background-color: #0056b3; transform: translateY(-1px); } .calculate-button:active { background-color: #004085; transform: translateY(0); } .calculator-results { background-color: #eaf6ff; border: 1px solid #b3d9ff; padding: 20px; border-radius: 8px; margin-top: 25px; } .calculator-results h3 { color: #0056b3; margin-top: 0; margin-bottom: 15px; font-size: 22px; text-align: center; } .calculator-results p { font-size: 18px; color: #333; margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; padding: 5px 0; border-bottom: 1px dashed #cce0ff; } .calculator-results p:last-child { border-bottom: none; margin-bottom: 0; } .calculator-results span { font-weight: bold; color: #007bff; text-align: right; flex-grow: 1; } @media (max-width: 480px) { .feet-inches-calculator-container { padding: 15px; margin: 20px auto; } .calculator-form .form-group { flex-direction: column; align-items: flex-start; } .calculator-form label { text-align: left; margin-bottom: 5px; margin-right: 0; } .calculator-form input[type="number"] { width: 100%; max-width: none; } .calculate-button { font-size: 16px; padding: 12px 15px; } .calculator-results p { flex-direction: column; align-items: flex-start; } .calculator-results span { text-align: left; margin-top: 5px; } }

Understanding Feet and Inches: A Guide to Measurement Conversion

The foot and inch are units of length in the imperial and US customary systems of measurement. While many parts of the world use the metric system (meters and centimeters), feet and inches remain standard in countries like the United States, Canada (unofficially), and the United Kingdom for various applications, especially in construction, personal height, and interior design.

What is a Foot?

A foot (plural: feet) is defined as exactly 12 inches. Historically, the length of a "foot" varied, often based on the length of a human foot. Today, it is standardized internationally. One foot is equivalent to 0.3048 meters.

What is an Inch?

An inch is a smaller unit of length, with 12 inches making up one foot. The term "inch" is derived from the Latin word "uncia," meaning "one-twelfth" (of a foot). An inch is precisely 2.54 centimeters.

Why Convert Feet and Inches?

Converting between feet, inches, and metric units is essential for several reasons:

  • International Communication: When working with international partners or traveling, converting measurements ensures everyone understands the dimensions correctly.
  • Construction and Design: Architects, engineers, and builders often need to convert between these units, especially when dealing with materials specified in different systems or when designing for global markets.
  • Personal Measurements: While height is commonly expressed in feet and inches in some regions, it's often needed in centimeters for medical records or international forms.
  • Simplifying Calculations: Sometimes, it's easier to perform calculations with a single unit (like total inches or total feet as a decimal) rather than mixed units.

How the Feet and Inches Calculator Works

Our Feet and Inches Converter simplifies the process of transforming your measurements. Here's the basic math behind it:

  • Feet to Inches: Since 1 foot equals 12 inches, to find the total inches from a given number of feet, you multiply the feet by 12.
  • Inches to Centimeters: Each inch is equivalent to 2.54 centimeters. So, to convert inches to centimeters, you multiply the number of inches by 2.54.
  • Total Inches Calculation: If you input both feet and inches, the calculator first converts the feet into inches and then adds the given inches to get a grand total in inches.
  • Total Feet (Decimal) Calculation: To express a measurement entirely in feet as a decimal, the inches portion is divided by 12 (since there are 12 inches in a foot) and then added to the whole number of feet.

Example Conversions:

Let's say you want to convert a height of 5 feet 10 inches:

  • To Total Inches:
    • Feet to inches: 5 feet * 12 inches/foot = 60 inches
    • Add remaining inches: 60 inches + 10 inches = 70 inches
    • Result: 70 inches
  • To Total Feet (Decimal):
    • Inches to decimal feet: 10 inches / 12 inches/foot = 0.8333 feet
    • Add whole feet: 5 feet + 0.8333 feet = 5.8333 feet
    • Result: Approximately 5.83 feet
  • To Total Centimeters:
    • Using total inches: 70 inches * 2.54 cm/inch = 177.8 cm
    • Result: 177.8 cm

This calculator provides a quick and accurate way to perform these common conversions, making your measurement tasks easier and more precise.

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