Surface Area of a Cube Calculator SA = 6a². Edge Surface area 96 Step-by-step with your numbers: 1. Values used: 2. Edge = 4 3. Surface area = 96 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Cube surface area. FAQ Volume? V = a³. Related calculators Cube Calculator Find a cube's volume, surface area and diagonal. Volume of a Cube Calculator V = a³. Cuboid Surface Area SA = 2(lw+lh+wh).