c5n.18xlarge
Compute optimized · c5n series · Intel Xeon Platinum 8124M
- vCPU
- 72
- Memory
- 192 GiB
- Linux / hour
- $3.89
- Per month
- $2,838
- Per vCPU-hour
- $0.0540
- Per GiB-hour
- $0.0203
Analysis
The c5n.18xlarge is a compute optimized instance in the c5n series with 72 vCPUs and 192 GiB of memory on Intel Xeon Platinum 8124M (up to 3 GHz), which makes it balanced at 2.67 GiB of memory per vCPU.
Within the same generation and size, the c5.18xlarge on Intel Xeon Platinum 8124M costs $3.06/hour, 21% less ($604 a month). The other variants are the c5d.18xlarge at $3.46.
Running it in Mumbai instead of São Paulo saves $1,524 a month per instance: $3.89/hour against $5.98/hour, a 54% spread.
On demand it costs $3.89/hour in US East (N. Virginia), $2,838 a month if left running, which puts it mid-table for compute optimized types at the 71st percentile per vCPU ($0.0540 per vCPU-hour) and the 21st percentile per GiB ($0.0203 per GiB-hour).
Reserving it for a year with no upfront payment cuts the Linux rate to $2.45/hour, which beats on demand once it runs more than 63% of the time; three years brings it to $1.41/hour, 64% below on demand. Windows Server roughly adds 85% to the bill at $7.20/hour, because the licence is charged per vCPU.
It is the largest of the 6 c5n sizes. Dropping to the c5n.9xlarge saves $1,419 a month.
Price by region (USD per hour)
| Region | Linux | Windows | 1-yr RI | 3-yr RI | |
|---|---|---|---|---|---|
| N. Virginia us-east-1 | $3.89 | $7.20 | $2.45 | $1.41 | |
| Ohio us-east-2 | $3.89 | $7.20 | $2.45 | $1.41 | |
| Oregon us-west-2 | $3.89 | $7.20 | $2.45 | $1.41 | |
| Canada Central ca-central-1 | $4.25 | $7.56 | $2.68 | $1.54 | |
| São Paulo sa-east-1 | $5.98 | $9.29 | $3.77 | $2.42 | |
| Ireland eu-west-1 | $4.39 | $7.70 | $2.77 | $1.84 | |
| London eu-west-2 | $4.61 | $7.92 | $2.90 | $1.93 | |
| Frankfurt eu-central-1 | $4.43 | $7.74 | $2.79 | $1.90 | |
| Mumbai ap-south-1 | $3.89 | $7.20 | $2.45 | $1.52 | |
| Singapore ap-southeast-1 | $4.46 | $7.78 | $2.81 | $1.74 | |
| Sydney ap-southeast-2 | $5.08 | $8.39 | $3.20 | $1.97 | |
| Tokyo ap-northeast-1 | $4.90 | $8.21 | $3.08 | $2.12 |
Shared tenancy, no pre-installed software. Reserved rates are standard, no upfront, per hour. Prices as of 2026-11-04.
Same shape, other types
| Type | vCPU | Memory | $/hour | vs c5n.18xlarge |
|---|---|---|---|---|
| c5.18xlarge Intel Xeon Platinum 8124M | 72 | 144 GiB | $3.06 | -21% |
| c5d.18xlarge Intel Xeon Platinum 8124M | 72 | 144 GiB | $3.46 | -11% |
Cost calculator
Specs
| vCPU | 72 |
|---|---|
| Memory | 192 GiB (2.7 per vCPU) |
| Processor | Intel Xeon Platinum 8124M |
| Clock | 3 GHz |
| Storage | EBS only |
| Network | 100 Gigabit |
c5n sizes
| c5n.large | 2 vCPU | $0.1080 |
| c5n.xlarge | 4 vCPU | $0.2160 |
| c5n.2xlarge | 8 vCPU | $0.4320 |
| c5n.4xlarge | 16 vCPU | $0.8640 |
| c5n.9xlarge | 36 vCPU | $1.94 |
| c5n.18xlarge | 72 vCPU | $3.89 |