r5b family
The r5b family has 9 sizes on AWS EC2, from 2 to 96 vCPUs and 16 to 768 GiB of memory. In US East (N. Virginia), on-demand prices run $0.149 to $7.152 per hour for Linux. It is sold in 14 regions and listed as memory optimized.
Sizes and prices in US East (N. Virginia)
| Type | vCPUs | Memory (GiB) | On-demand /hr | Spot /hr | 1-yr reserved /hr |
|---|---|---|---|---|---|
| r5b.large | 2 | 16 | $0.149 | $0.0394 | $0.0939 |
| r5b.xlarge | 4 | 32 | $0.298 | $0.0957 | $0.1877 |
| r5b.2xlarge | 8 | 64 | $0.596 | $0.22 | $0.3755 |
| r5b.4xlarge | 16 | 128 | $1.192 | $0.4994 | $0.751 |
| r5b.8xlarge | 32 | 256 | $2.384 | $0.8005 | $1.502 |
| r5b.12xlarge | 48 | 384 | $3.576 | $1.233 | $2.253 |
| r5b.16xlarge | 64 | 512 | $4.768 | $1.818 | $3.004 |
| r5b.24xlarge | 96 | 768 | $7.152 | $2.46 | $4.506 |
| r5b.metal | 96 | 768 | $7.152 | $1.981 | $4.506 |
Compare r5b
Same generation
Categories
Regions
Prices in USD per hour for Linux; reserved prices are 1 year, no upfront. Updated 2026-11-12 from AWS public price lists. Compare all AWS EC2 instance types.