AWS Step Functions Pricing Calculator - Standard vs Express Cost Estimator
AWS Step Functions pricing calculator for Standard and Express workflows. Estimate state transition, request, and duration costs across AWS regions.
Frequently Asked Questions
What is the pricing difference between Standard and Express workflows?
Standard workflows bill per state transition. Express workflows bill for each request plus the billed duration and memory consumed by each execution. Because the two bill on different dimensions, the cheaper option flips with your state count: at minimum 64 MB memory, Express wins at any legal duration from about 13 states per execution, while a two-state workflow running longer than 47 seconds is cheaper on Standard. Higher memory and the Standard free tier both move that line, so compare monthly totals for your own numbers.
Does AWS Step Functions include a free tier?
Standard workflows include 4,000 free state transitions per month. Express workflows do not use that Step Functions free tier model.
How does Express workflow duration billing work?
AWS rounds Express workflow duration up to the nearest 100ms and bills memory in 64MB chunks. That means short executions or slightly larger payloads can cost more than a raw average would suggest.
Does this calculator include Lambda or ECS costs triggered by a workflow?
No. This calculator only estimates Step Functions charges. If your workflow invokes Lambda functions or ECS tasks, model those separately with the Lambda calculator and ECS calculator.
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