DynamoDB Capacity Estimator

v1.0.0

On-demand vs provisioned helper — RCU / WCU calc, autoscaling, cost crossover point.

Item Size (KB)

Reads / second

Writes / second

Read Consistency

Result

DynamoDB Capacity Estimate

Item size: 1 KB  Read: eventual  Reads/s: 100  Writes/s: 50

Provisioned mode:
  Read Capacity Units (RCU):  50 RCU/s
  Write Capacity Units (WCU): 50 WCU/s
  Provisioned cost est.:      ~$28.47/month

On-demand mode (30 days at constant rate):
  Read cost:   ~$16.20
  Write cost:  ~$81.00
  Total:       ~$97.20

Rule of thumb: on-demand is cheaper at <10M ops/month; provisioned cheaper at steady high load.