How much VRAM does a 4K texture use?

Analyze a complete texture set or ZIP

Choose the real source files instead of entering every width, height, quantity, format, and mip setting by hand. The browser tool reads supported image headers, expands ZIP entries locally, hashes exact duplicates, samples decoded alpha where supported, and calculates each mip level with GPU block rounding.

• Download size and expanded source bytes
• RGBA8-equivalent uncompressed GPU memory and exact mipmap overhead
• Desktop, Mobile, and VR / Quest recommendations
• BC1, BC3, BC5, BC7, ASTC, ETC2, and KTX2 transcode comparisons
• Unused alpha, duplicate, oversized-map, normal-format, and ORM packing checks

Run 4K Texture VRAM

4K texture memory at a glance

A 4096 by 4096 RGBA8 texture uses 64 MiB at the base level and about 85.33 MiB with a complete mip chain. BC1 reduces the full-chain estimate to about 10.67 MiB, while BC3, BC5, and BC7 use about 21.33 MiB. ASTC depends on block size.

A 4K label is only the beginning of the calculation

Two 4K textures can have the same dimensions and very different runtime costs. Alpha, normal-map quality, format support, mip residency, and screen coverage determine whether the resolution is justified.

1. Confirm the map role. Albedo and normal detail may justify more texels than roughness, metallic, or AO masks.
2. Choose the compatible format. Use the platform format that preserves the channels and quality the map actually needs.
3. Test screen coverage. Downsize when the asset never presents enough pixels on screen to reveal 4K detail.

4K Texture VRAM FAQ