How much data can you fit on a Blu-ray disc?

A single-layer disc can hold 25GB. A dual-layer disc can hold 50GB. To ensure that the Blu-ray Disc format is easily extendable (future-proof) it also includes support for multi-layer discs, which should allow the storage capacity to be increased to 100GB-200GB (25GB per layer) in the future simply by adding more layers to the discs.

Type Diameter(cm) Layers Capacity(Bytes)
Standard disc size, single layer 12 1 25,025,314,816
Standard disc size, dual layer 12 2 50,050,629,632
Standard disc size, XL 3 layer 12 3 100,103,356,416
Standard disc size, XL 4 layer 12 4 128,001,769,472
Mini disc size, single layer 8 1 7,791,181,824
Mini disc size, dual layer 8 2 15,582,363,648