Cubits to Feet Calculator

Cubits to Feet Conversion Calculator

Common/Hebrew Cubit (18 inches) Royal Egyptian Cubit (20.6 inches) Roman Cubit (17.5 inches) Greek Cubit (18.2 inches) Sumerian Cubit (20.4 inches) Long/Ezekiel's Cubit (21.8 inches)

Result:

function calculateCubitsToFeet() { var cubitInput = document.getElementById('cubitValue').value; var conversionFactor = document.getElementById('cubitType').value; var resultArea = document.getElementById('resultArea'); var feetOutput = document.getElementById('feetOutput'); if (cubitInput === "" || isNaN(cubitInput) || cubitInput <= 0) { alert("Please enter a valid number of cubits."); resultArea.style.display = "none"; return; } var cubits = parseFloat(cubitInput); var factor = parseFloat(conversionFactor); var totalFeet = cubits * factor; // Calculating remaining inches for better precision display var wholeFeet = Math.floor(totalFeet); var remainingInches = ((totalFeet – wholeFeet) * 12).toFixed(1); feetOutput.innerHTML = totalFeet.toFixed(2) + " ft (" + wholeFeet + " ft " + remainingInches + " in)"; resultArea.style.display = "block"; }

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What is a Cubit?

The cubit is an ancient unit of length based on the distance from the elbow to the tip of the middle finger. While it was widely used across the Ancient Near East and Mediterranean, the exact measurement varied significantly between civilizations.

Historical Variations and Standards

Because humans vary in size, ancient empires established standardized "royal" rods to ensure consistency in construction. Common variations include:

• Common Cubit: Typically 18 inches (1.5 feet), used extensively in everyday trade and mentioned in biblical texts.
• Royal Egyptian Cubit: Approximately 20.6 to 20.8 inches (1.718 feet). This was the standard used to build the Great Pyramids of Giza.
• Roman Cubit: Roughly 17.5 inches (1.458 feet), influenced by Greek measurements.
• Long Cubit: Mentioned in the Book of Ezekiel, this was a cubit plus a handbreadth, totaling about 21.8 inches.

How to Convert Cubits to Feet

To convert cubits to feet manually, you must first determine which standard you are using. The basic formula is:

Length in Feet = Number of Cubits × (Cubit Length in Inches ÷ 12)

For example, if you are converting 300 cubits (the length of Noah's Ark) using the Common Cubit (18 inches):

300 × 1.5 feet = 450 feet.

Practical Examples

Historical Structure	Length in Cubits	Estimated Feet
Noah's Ark (Length)	300 Cubits	450 – 515 ft
Great Pyramid (Base)	440 Royal Cubits	756 ft
Solomon's Temple (Length)	60 Cubits	90 – 109 ft

Frequently Asked Questions

Is a cubit always 18 inches?
No. While 18 inches is the most common estimate used for general biblical conversions, the Egyptian Royal Cubit was nearly 3 inches longer.

Why did civilizations use different cubits?
Units of measurement were localized. A "Royal" cubit was often larger than a "Common" cubit to reflect the status of the Pharaoh or King and was strictly enforced for state building projects.