Texture memory & triangle budget calculator

Textures

Resolution

Format

Mipmaps

Maps per material

Materials

Triangles

Triangles per model

Copies on screen

Share drawn at a lower LOD (%)

LOD triangle ratio (%)

How it's worked out

Memory per texture = width x height x bytes per pixel, plus one third more when mipmaps are on (the full mip chain adds about 33%). Bytes per pixel: uncompressed RGBA8 = 4, BC1/DXT1 = 0.5, BC3/BC5/BC7 = 1, ASTC 4x4 = 1, ASTC 6x6 = about 0.44, ASTC 8x8 = 0.25. Real engines add small overheads (alignment, streaming pools), so treat the result as a floor.