How much can I save with Reserved Instances?

RDS Reserved Instances offer up to 40-60% savings over On-Demand pricing depending on the term length and payment option (All Upfront, Partial Upfront, or No Upfront). A 3-year All Upfront reservation provides the deepest discount. The estimator shows exact savings so you can evaluate the commitment tradeoff.

What is the cost impact of enabling Multi-AZ?

Multi-AZ roughly doubles the instance and storage cost because AWS maintains a synchronous standby replica in a different Availability Zone. However, it provides automatic failover with near-zero downtime. The estimator shows the exact premium so you can weigh availability requirements against budget.

Does the tool include backup storage costs?

RDS provides free backup storage equal to your provisioned database storage size. The estimator notes this and lets you specify additional backup retention that exceeds the free allocation, which is billed per GB-month.

RDS Instance Cost Estimator

StorageAWS

Estimate monthly AWS RDS costs by engine, instance class, Multi-AZ, storage type, IOPS, and Reserved vs On-Demand pricing.

RDS Instance Configuration

Example Presets

Database Engine

Instance Class

Multi-AZ DeploymentDisabled

Storage Type

Storage Size (GB)

Pricing Model

Backup Storage (GB)

Free up to your DB storage size. Charged $0.095/GB-month beyond that.

About RDS Pricing

Multi-AZ Deployments: Amazon RDS Multi-AZ creates a synchronous standby replica in a different Availability Zone. This doubles the instance cost but provides automatic failover for high availability. Storage costs are not doubled.

Reserved Instances: Reserved Instances offer significant discounts (up to 60% for 3-year All Upfront) compared to On-Demand pricing. The 1-year No Upfront option provides approximately 35% savings with no upfront payment required.

Storage Types: gp3 (General Purpose SSD) includes 3,000 baseline IOPS and 125 MB/s throughput at no extra cost. io1/io2 (Provisioned IOPS SSD) let you provision specific IOPS levels for I/O-intensive workloads. Magnetic storage is the lowest cost option for infrequent access patterns.

Backup Storage: RDS provides free backup storage equal to your total database storage. Additional backup storage beyond your DB size is charged at $0.095/GB-month.

Prices shown are approximate us-east-1 rates. Actual pricing varies by region and may change. Check the AWS pricing page for current rates.

Raw Output

Output will appear here...

About This Tool

The RDS Instance Cost Estimator calculates monthly Amazon RDS costs with granular control over engine, instance class, deployment type, storage, and pricing model. It supports MySQL, PostgreSQL, MariaDB, Oracle, SQL Server, and Aurora engines with both On-Demand and Reserved Instance pricing at 1-year and 3-year terms. Configure Multi-AZ for high availability, choose between gp3, io1, and magnetic storage, and specify provisioned IOPS to see a complete cost breakdown. The estimator also covers Aurora Serverless v2 ACU-based pricing for workloads with variable demand, making it the definitive tool for RDS budget planning.

When to Use This Tool

•Estimating the monthly cost of a Multi-AZ PostgreSQL RDS instance with io1 storage and provisioned IOPS for a production workload.
•Comparing On-Demand versus 1-year and 3-year Reserved Instance pricing to calculate break-even points.
•Modeling Aurora Serverless v2 costs for a development environment with unpredictable usage patterns.
•Sizing RDS storage and IOPS for a high-throughput OLTP application while staying within a target budget.

Frequently Asked Questions

How much can I save with Reserved Instances?: RDS Reserved Instances offer up to 40-60% savings over On-Demand pricing depending on the term length and payment option (All Upfront, Partial Upfront, or No Upfront). A 3-year All Upfront reservation provides the deepest discount. The estimator shows exact savings so you can evaluate the commitment tradeoff.
What is the cost impact of enabling Multi-AZ?: Multi-AZ roughly doubles the instance and storage cost because AWS maintains a synchronous standby replica in a different Availability Zone. However, it provides automatic failover with near-zero downtime. The estimator shows the exact premium so you can weigh availability requirements against budget.
Does the tool include backup storage costs?: RDS provides free backup storage equal to your provisioned database storage size. The estimator notes this and lets you specify additional backup retention that exceeds the free allocation, which is billed per GB-month.

Disclaimer: This tool runs entirely in your browser. No data is sent to our servers. Always verify outputs before using them in production. AWS, Azure, and GCP are trademarks of their respective owners.