Work out cloud monthly cost instantly with clear inputs, formula shown and shareable results.
A cloud bill is dominated by compute hours, but storage and egress are the components that surprise people. Compute is instances times hourly rate times 730 hours per average month. Egress is billed per gigabyte after a small free allowance and at roughly a hundred times the cost of the same bytes moving within a region, which is why it deserves its own line.
Monthly cost
compute = instances x hourly rate x 730; storage = GB x per-GB rate; egress = (GB - free tier) x per-GB rate
730 is the average month length across a year, which is what providers use for monthly pricing. Using 720 understates the bill by about 1.4 percent.
NAT gateway data processing, load balancer capacity units, snapshot storage, and cross-availability-zone traffic. Together they often add 10 to 20 percent.