Truncated Cone Volume V = πh/3(R²+Rr+r²). Top radius Bottom radius Height Volume 410.5 Step-by-step with your numbers: 1. Values used: 2. Top radius = 3 3. Bottom radius = 5 4. Height = 8 5. Volume = 410.5 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Frustum = truncated cone. FAQ Bucket? Yes! Related calculators Truncated Cone (Frustum) Calculator Find frustum volume. Cone Volume Calculator V = π r² h / 3. Cone Calculator Find a cone's volume, slant height and surface area.