Rectangle Area (Length x Width)
Circle Area (Radius)
Triangle Area (Base x Height)
Rectangular Volume (L x W x H)
Meters
Feet
Centimeters
Inches
Result:
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var field3 = document.getElementById("inputField3");
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var label3 = document.getElementById("label3");
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label1.innerHTML = "Length:";
label2.innerHTML = "Width:";
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field3.style.display = "none";
label1.innerHTML = "Base:";
label2.innerHTML = "Height:";
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label1.innerHTML = "Length:";
label2.innerHTML = "Width:";
label3.innerHTML = "Height:";
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function calculateMeasure() {
var mode = document.getElementById("calcMode").value;
var v1 = parseFloat(document.getElementById("val1").value);
var v2 = parseFloat(document.getElementById("val2").value);
var v3 = parseFloat(document.getElementById("val3").value);
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var result = 0;
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alert("Please enter valid numeric values for all required fields.");
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if (mode === "rectangle") {
result = v1 * v2;
displayUnit = "sq " + unit;
details = "Formula: Length (" + v1 + ") × Width (" + v2 + ")";
} else if (mode === "circle") {
result = Math.PI * Math.pow(v1, 2);
displayUnit = "sq " + unit;
details = "Formula: π × Radius² (π × " + v1 + "²)";
} else if (mode === "triangle") {
result = 0.5 * v1 * v2;
displayUnit = "sq " + unit;
details = "Formula: 0.5 × Base (" + v1 + ") × Height (" + v2 + ")";
} else if (mode === "volume") {
result = v1 * v2 * v3;
displayUnit = "cubic " + unit;
details = "Formula: Length × Width × Height (" + v1 + " × " + v2 + " × " + v3 + ")";
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document.getElementById("calcOutput").innerHTML = result.toLocaleString(undefined, {maximumFractionDigits: 4}) + " " + displayUnit;
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How to Calculate Measures Accurately
Calculating accurate measurements is a fundamental skill used in everything from home renovation projects to high-level engineering. Whether you need to determine the area of a floor to buy tiles or the volume of a tank to hold water, understanding the underlying formulas is essential.
Common Measurement Formulas
Different shapes require specific mathematical approaches. Below are the standard formulas used by our calculator:
Square/Rectangle Area: Length × Width
Circle Area: π (approx. 3.14159) × Radius²
Triangle Area: ½ × Base × Height
Rectangular Volume: Length × Width × Height
Step-by-Step Example
Suppose you are measuring a triangular garden plot to determine how much mulch you need to cover it. The base of the triangle is 10 meters and the height is 5 meters.
Identify the base (10) and the height (5).
Apply the formula: Area = 0.5 × 10 × 5.
Calculate: 0.5 × 50 = 25.
The final measure is 25 square meters.
Units of Measurement Explained
When you calculate measure, the unit is just as important as the number. Area is always expressed in "square" units (e.g., sq meters, sq inches) because it represents a two-dimensional space. Volume is expressed in "cubic" units (e.g., cubic feet, cm³) as it represents three-dimensional space.
To Convert From
To
Multiply By
Inches
Centimeters
2.54
Feet
Meters
0.3048
Square Feet
Square Meters
0.0929
Frequently Asked Questions
How do I measure an irregular shape?
The best method for irregular shapes is to break them down into smaller, standard shapes (like multiple rectangles and triangles), calculate the area of each, and then add them together for a total measurement.
What is the difference between Radius and Diameter?
The radius is the distance from the center of a circle to its edge. The diameter is the distance from one edge to the other, passing through the center. Diameter is always twice the radius (D = 2r).