On-demand hourly price across a fleet of EC2 instances.
An instance left running 730 hours costs far more than one scheduled for the ~160 working hours it is actually used. Schedule dev fleets and reserve the baseline. Compare Spot on the spot instance savings calculator.
Free EC2 cost calculator — instance count, hourly price and running hours to your real monthly compute bill.
On-demand instances bill per second (minimum one minute) at an hourly rate set by instance type and region. A month of always-on is about 730 hours. Spot instances are far cheaper but can be reclaimed; Savings Plans discount steady usage.
Turn off non-production instances outside working hours, right-size over-provisioned types, use Spot for fault-tolerant work, and commit to a Savings Plan for the always-on baseline. Idle and oversized instances are the usual waste.