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Spherical Cap Surface Area Calculator

Enter any two of base radius (r), ball radius (R) or cap height (h). The third is derived from r² = h(2R − h). Output: SA = 2πRh + πr² (curved surface plus…

What this calculator does

Computes the surface area of a spherical cap from its dimensions, using the formula SA = 2πRh + πr². Supports all common length units on input and any area unit on output, with a worked breakdown.

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