r3 family
The r3 family has 5 sizes on AWS RDS, from 2 to 32 vCPUs and 15.25 to 244 GiB of memory. In US East (N. Virginia), on-demand prices run $0.25 to $3.98 per hour for PostgreSQL, Single-AZ. It is sold in 15 regions and listed as memory optimized.
Sizes and prices in US East (N. Virginia)
| Type | vCPUs | Memory (GiB) | On-demand /hr | 1-yr reserved /hr |
|---|---|---|---|---|
| db.r3.large | 2 | 15.25 | $0.25 | – |
| db.r3.xlarge | 4 | 30.5 | $0.5 | – |
| db.r3.2xlarge | 8 | 61 | $0.995 | – |
| db.r3.4xlarge | 16 | 122 | $1.99 | – |
| db.r3.8xlarge | 32 | 244 | $3.98 | – |
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Regions
Prices in USD per hour for PostgreSQL, Single-AZ; reserved prices are 1 year, no upfront. Updated 2026-11-12 from AWS public price lists. Compare all AWS RDS sizes.