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RDS Instance Cost Calculator

Work out rds instance cost instantly with clear inputs, formula shown and shareable results.

About RDS Instance Cost Calculator

Managed database pricing multiplies with redundancy: a multi-AZ deployment runs a full standby you cannot read from, doubling both compute and storage charges. Provisioned IOPS is a separate line and is often the largest component on write-heavy workloads, which is why gp3-style volumes with a generous baseline are usually cheaper than provisioning IOPS explicitly.

Formula

Managed database cost

compute = hourly x 730 x redundancy multiplier; storage and IOPS also multiply for multi-AZ; total = compute + storage + IOPS

Worked example

With the default values below, RDS Instance Cost Calculator returns Monthly database cost of $1,170.80. Change any input above and every figure here is recalculated in your browser.

Inputs used

Instance hourly rateminimum 0
0.48
Allocated storageminimum 1 GB
1,000 GB
Provisioned IOPSminimum 0 IOPS
6,000 IOPS
Deployment modeone of Single availability zone, Multi-AZ with standby, Multi-AZ cluster with two readable standbys
Multi-AZ with standby

Results

Monthly database cost
$1,170.80
Compute
$700.80
Storage and provisioned IOPS
$470.00
Cost multiplier from redundancy
2 x

Step by step

  1. 1Values used
  2. 2Managed database cost
  3. 3Monthly database cost= 1,170.80
  4. 4Compute= 700.80
  5. 5Storage and provisioned IOPS= 470.00
  6. 6Cost multiplier from redundancy= 2 x

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Is the multi-AZ standby usable for reads?

Not in the classic configuration — it exists solely for failover. Multi-AZ cluster deployments provide two readable standbys but cost three times single-AZ compute.

Why is managed database pricing so much higher than the equivalent instance?

It includes automated backup, patching, failover orchestration and monitoring. Whether that premium is worth it depends on how much operational effort it removes.

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