AWS Cost Calculators
Free AWS calculators for the charges that surprise people: NAT gateways, idle EC2, EBS, S3, RDS and more.
13 free tools · no login
Tools
Extended Support Exposure Checker
Check your RDS, EKS, ElastiCache and OpenSearch versions and see what AWS charges extra once standard support ends.
NAT Gateway & Data Transfer Calculator
See what your NAT gateways and data transfer cost each month, and what VPC endpoints would save.
EBS gp2 vs gp3 Calculator
Find out how much moving EBS volumes from gp2 to gp3 saves, including the extra performance large volumes must buy.
AWS Backup Cost Calculator
Estimate your backup costs and see how retention, storage tiers, and copies affect your bill.
S3 Storage Class Calculator
Compare S3 storage classes on your own data and access pattern, with retrieval fees and minimum storage periods included.
EC2 Idle & Rightsizing Calculator
See what idle and oversized EC2 instances cost, and compare stopping, downsizing or a Savings Plan.
Amazon RDS Cost & Rightsizing Calculator
Estimate instance and storage cost, isolate the Multi-AZ premium, and compare practical ways to reduce it.
Lambda Cost & Memory Tuning Calculator
Find the cheapest Lambda memory setting for your function, and the fastest setting that costs about the same.
Fargate vs EC2 Calculator
Compare running containers on Fargate against the EC2 instances you would need to buy for the same work.
DynamoDB On-Demand vs Provisioned
Find out whether on-demand or provisioned capacity is cheaper for your DynamoDB tables, based on how steady your traffic is.
ElastiCache Cost & Reserved Nodes
Price a Valkey cluster with every replica, and compare reserved node terms and Serverless.
CloudFront vs S3 Direct Calculator
Find out whether serving files through CloudFront or straight from S3 costs less for your traffic.
Cloud Logging Cost Calculator
See your log bill on Google Cloud Logging, CloudWatch or Datadog, and what filtering, sampling and shorter retention save.
What drives the cost
Most calculators multiply a rate by a quantity. The AWS charges that surprise people are the ones that stack, or keep billing after a fix.
NAT gateway: three charges on one line
A NAT gateway bills per hour, even with no traffic, then per GB processed, then again for data sent to the internet.
EC2: stopped is not free
A stopped instance still pays for its EBS volumes and any Elastic IP.
RDS: Multi-AZ doubles storage too
Multi-AZ doubles the storage bill as well as compute. On a large database, storage is the bigger surprise.
EBS: the gp3 saving can shrink
Moving gp2 to gp3 saves 20% on storage. But a large gp2 volume came with IOPS that gp3 charges extra for, which eats into the saving.
How these calculators count
Each calculator shows the rate it used and the date it was checked, and notes where it is deliberately conservative. Prices are AWS list prices for US East (N. Virginia), or the Region you pick, before discounts. Everything runs in your browser.
Other categories
These calculators, or one platform watching every account.
These price a snapshot you type in. Finitizer inventories every volume, instance, gateway and function across every account, checks actual utilization rather than provisioned, and opens the change as a Terraform pull request.
See how Finitizer works