About Asset Bundle Size Estimator

Estimate build sizes for textures, audio, meshes across platforms. Part of the DevTools Surf developer suite. Browse more tools in the Game Dev collection.

Use Cases

• Mobile game developers estimating build sizes for store limits
• Technical artists optimizing texture budgets across quality tiers
• Build engineers planning asset bundle download strategies
• Producers tracking content size budgets across development milestones

Tips

• Compare compressed vs uncompressed sizes for each asset type
• Check texture sizes at different compression formats like ASTC
• Estimate total build size across target platforms simultaneously

Fun Facts

• A single 4096x4096 uncompressed RGBA texture uses 64 MB of memory — ASTC compression at 4x4 block size reduces this to approximately 4 MB, a 16x reduction.
• Unity's addressable asset system, released in 2019, enabled on-demand asset downloading — some mobile games reduced initial install size from 2 GB to under 100 MB using this approach.
• The Google Play Store enforces a 200 MB APK size limit (increased from 100 MB in 2022), and Apple's App Store warns users about downloads over 200 MB on cellular — making size estimation critical.

FAQ

Which platforms does it estimate?

Mobile (iOS, Android), console (PlayStation, Xbox, Switch), desktop, web (WebGL/WebGPU). Each has different compression and texture format defaults.

What asset types?

Textures (with format/compression), audio (bitrate-based), meshes (vertex/tri counts), animations, and code blobs. Covers the big contributors to bundle size.

Is this for Unity, Unreal, or generic?

Generic math — works for any engine. Unity and Unreal have specific platform compression; the estimator's defaults approximate the common cases.

Can I set platform-specific overrides?

Yes — per-platform compression settings. Useful for spotting the biggest bundle on each platform.