How this calculator works
Enter monthly visits, mb transferred per visit, cdn price per gb ($), cache hit rate (%). CalcStack applies the displayed formula and reports each intermediate planning value with the units shown.
Formula / method
Origin GB = visits × MB/visit × (1 − cache hit rate) ÷ 1,000
Worked example
2M visits at 1.8 MB each and $0.08/GB cost about $288 in CDN transfer.
Assumptions and limitations
Transfer per visit and the price per decimal GB are stable.
Free tiers, regional pricing, request fees, compression and non-cacheable assets are excluded.