Engine displacement is the total volume swept by all pistons in an engine — a key spec for comparing engine size and performance. Enter your bore, stroke, and cylinder count to calculate it. CONSTRUCTION & HOME · CALCULATOR Engine Displacement Calculator Measurement Unit Millimeters (mm) Inches (in) Bore (cylinder diameter) Stroke (piston travel distance) Number of Cylinders Calculate Displacement Per Cylinder 0 cc Total Displacement 0 cc How to Use the Engine Displacement Calculator Select your measurement unit (millimeters or inches). Enter the bore (cylinder diameter) and stroke (piston travel distance) — found in your engine specs or manual. Enter t...
A weighted mean gives some values more influence than others — useful for grades weighted by credit hours, portfolio returns weighted by investment size, or survey scores weighted by respondent count. Enter your values and weights below.
FINANCE & INVESTING · CALCULATOR
Weighted Mean Calculator
Sum of (Value × Weight)
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Sum of Weights
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Weighted Mean
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How to Use the Weighted Mean Calculator
- Enter each value you want to average.
- Enter the weight for that value (how much it should count relative to the others).
- Click "+ Add Another Value" if you have more than three data points.
- Click "Calculate Weighted Mean" to see your result.
How the Weighted Mean Is Calculated
Unlike a simple average, a weighted mean accounts for the relative importance of each value:
Weighted Mean = Σ(Value × Weight) ÷ Σ(Weight)
For example, if a 3-credit class earned a 90 and a 4-credit class earned an 80: (90×3 + 80×4) ÷ (3+4) = 590 ÷ 7 ≈ 84.3 — notice this differs from a simple average of 85, because the 4-credit class counts more.
Frequently Asked Questions
When should I use a weighted mean instead of a regular average?
Use a weighted mean whenever some data points should count more than others — like grades weighted by credit hours, or survey results weighted by sample size.
What happens if all my weights are equal?
A weighted mean with equal weights produces the same result as a simple average — the weighting only changes the outcome when weights differ.
Can weights be percentages instead of whole numbers?
Yes — the formula works the same whether your weights are percentages, credit hours, or any other proportional measure, as long as you're consistent.
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Disclaimer: This calculator provides general mathematical results based on the values you enter. Always double-check inputs for accuracy, especially for academic or financial calculations.
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