db.r5.largevsdb.r5b.large

db.r5.large is 16% cheaper than db.r5b.large on demand in US East (N. Virginia), saving $33.58 a month.

At a glancedb.r5.largedb.r5b.large
On-demand$0.25/hr16% less$0.296/hr
Lowest rate$0.1444/hr16% less1-yr reserved, no upfront$0.1714/hr1-yr reserved, no upfront
Size2 vCPUs, 16 GiB2 vCPUs, 16 GiB

Prices in US East (N. Virginia)

“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.

Optiondb.r5.largedb.r5b.largedb.r5b.large vs db.r5.large
On-demandPay by the hour$0.25$0.296▲ 18%
1-yr reservedNo upfront42% off$0.144442% off$0.1714▲ 19%

Key differences

The biggest lead each one has.

Where db.r5.large leads
On-demand price$0.25 vs $0.296 per hour
16% cheaper
Where db.r5b.large leads
EBS max IOPS43,333 vs 18,750
2.3× higher

Specs

9 of 20 specs differ. Those are in bold.

ComputeAll 6 matchdb.r5.largedb.r5b.large
vCPUs22
Physical cores11
Threads per core22
CPU makerIntelIntel
Sustained clock3.1 GHz3.1 GHz
BurstableNoNo
MemoryAll 1 matchdb.r5.largedb.r5b.large
Memory (GiB)1616
NetworkingAll 2 matchdb.r5.largedb.r5b.large
Network baseline0.75 Gbps0.75 Gbps
Network peak10 Gbps10 Gbps
Storage6 of 7 differdb.r5.largedb.r5b.large
StorageEBS OnlyEBS Only
EBS baseline bandwidth650 Mbps1,250 Mbps
EBS max bandwidth4,750 Mbps10,000 Mbps
EBS baseline throughput81.25 MB/s156.25 MB/s
EBS max throughput593.75 MB/s1,250 MB/s
EBS baseline IOPS3,6005,417
EBS max IOPS18,75043,333
Instance details2 of 3 differdb.r5.largedb.r5b.large
Familyr5r5b
CategoryMemory optimizedMemory optimized
Normalization factor8–
Other1 of 1 differdb.r5.largedb.r5b.large
Hardware Basisr5.larger5b.large

On-demand prices by region

Cheapest for db.r5.large first. PostgreSQL, USD per hour.

Regiondb.r5.largedb.r5b.largeDifference
US East (N. Virginia)Used in summaryus-east-1$0.25$0.296▲ 18%
US East (Ohio)us-east-2$0.25$0.296▲ 18%
US West (Oregon)us-west-2$0.25$0.296▲ 18%
EU (Stockholm)eu-north-1$0.257$0.292▲ 14%
Canada (Central)ca-central-1$0.2703$0.302▲ 12%
EU (Ireland)eu-west-1$0.28$0.309▲ 10%
EU (London)eu-west-2$0.294$0.324▲ 10%
EU (Milan)eu-south-1$0.294$0.324▲ 10%
Asia Pacific (Seoul)ap-northeast-2$0.3$0.329▲ 10%
Asia Pacific (Singapore)ap-southeast-1$0.3$0.351▲ 17%
Asia Pacific (Sydney)ap-southeast-2$0.3$0.335▲ 12%
Asia Pacific (Tokyo)ap-northeast-1$0.3$0.357▲ 19%
EU (Frankfurt)eu-central-1$0.305$0.357▲ 17%
South America (Sao Paulo)sa-east-1$0.524$0.438▼ 16%

Keep exploring

Each type’s own page, and how it compares with others.

db.r5.largeMemory optimized, r5 family
db.r5.large prices and specsEvery size in the r5 family

Compare db.r5.large with

db.m5.largedb.r5d.largedb.r5b.large.tpc1.mem2xdb.r4.largedb.r6i.largedb.r6i.large.tpc1.mem2x
db.r5b.largeMemory optimized, r5b family
db.r5b.large prices and specsEvery size in the r5b family

Compare db.r5b.large with

db.r5.large.tpc1.mem2x

Pay the committed rate, with commitment protection

The best committed rate on these two is 42% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

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AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.