db.m3.xlargevsdb.r3.xlarge

db.m3.xlarge is 22% cheaper than db.r3.xlarge on demand in US East (N. Virginia), saving $80.30 a month.

At a glancedb.m3.xlargedb.r3.xlarge
On-demand$0.39/hr22% less$0.5/hr
Size4 vCPUs, 15 GiB4 vCPUs, 30.5 GiB

Prices in US East (N. Virginia)

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

Optiondb.m3.xlargedb.r3.xlargedb.r3.xlarge vs db.m3.xlarge
On-demandPay by the hour$0.39$0.5▲ 28%

Key differences

The biggest lead each one has.

Where db.m3.xlarge leads
On-demand price$0.39 vs $0.5 per hour
22% cheaper
Network peak10 Gbps vs 2.8 Gbps
3.6× higher
Where db.r3.xlarge leads
Memory (GiB)30.5 vs 15
2× higher

Specs

7 of 19 specs differ. Those are in bold.

ComputeAll 6 matchdb.m3.xlargedb.r3.xlarge
vCPUs44
Physical cores22
Threads per core22
CPU makerIntelIntel
Sustained clock2.5 GHz2.5 GHz
BurstableNoNo
Memory1 of 1 differdb.m3.xlargedb.r3.xlarge
Memory (GiB)1530.5
Networking2 of 2 differdb.m3.xlargedb.r3.xlarge
Network baseline1 Gbps0.7 Gbps
Network peak10 Gbps2.8 Gbps
Storage1 of 7 differdb.m3.xlargedb.r3.xlarge
Local disks2 × 40 GB SSD1 × 80 GB SSD
EBS baseline bandwidth500 Mbps500 Mbps
EBS max bandwidth500 Mbps500 Mbps
EBS baseline throughput62.5 MB/s62.5 MB/s
EBS max throughput62.5 MB/s62.5 MB/s
EBS baseline IOPS4,0004,000
EBS max IOPS4,0004,000
Instance details2 of 2 differdb.m3.xlargedb.r3.xlarge
Familym3r3
Normalization factor–8
Other1 of 1 differdb.m3.xlargedb.r3.xlarge
Hardware Basism3.xlarger3.xlarge

On-demand prices by region

Cheapest for db.m3.xlarge first. PostgreSQL, USD per hour.

Regiondb.m3.xlargedb.r3.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.39$0.5▲ 28%
US West (Oregon)us-west-2$0.39$0.5▲ 28%
EU (Ireland)eu-west-1$0.42$0.555▲ 32%
US West (N. California)us-west-1$0.42$0.555▲ 32%
AWS GovCloud (US-West)us-gov-west-1$0.445$0.599▲ 35%
EU (Frankfurt)eu-central-1$0.455$0.6▲ 32%
Asia Pacific (Tokyo)ap-northeast-1$0.485$0.6▲ 24%
Asia Pacific (Singapore)ap-southeast-1$0.5$0.6▲ 20%
Asia Pacific (Sydney)ap-southeast-2$0.5$0.6▲ 20%

Keep exploring

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

db.m3.xlargem3 family
db.m3.xlarge prices and specsEvery size in the m3 family

Compare db.m3.xlarge with

db.m2.xlargedb.m4.xlarge
db.r3.xlarger3 family
db.r3.xlarge prices and specsEvery size in the r3 family

Compare db.r3.xlarge with

db.r4.xlarge

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