Estimate hemisphere surface area and enclosed volume from dome diameter.
Calculator
Result Summary
Review the main answer, supporting values, chart breakdown, and calculation details.
Result Breakdown
Calculation Details
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How it works
Estimate hemisphere surface area and enclosed volume from dome diameter. Use the units shown in the calculator and review every assumption before using the result.
Formula
For a hemisphere: surface area = 2πr²; volume = 2/3πr³.
Worked example
A 20 ft diameter hemispherical dome has about 628 sq ft of curved surface area.
Important assumptions
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Frequently asked questions
Is this calculator free?
Yes. It runs in your browser and does not require an account.
Are the results exact?
The math is deterministic for the entered values, but the result depends on inputs and assumptions. Verify safety-critical, financial, code-related, towing, fitment, and manufacturer-specific decisions with authoritative information.