CDN Cache Hit Ratio Calculator
Estimate cache hit ratio, origin offload, and bandwidth cost savings from fronting origin traffic with a CDN.
Estimated cache hit ratio97.5%
50,000 origin / 1,950,000 cached requests per day Monthly bandwidth cost with CDN$267.00
vs. $1080.00 serving everything from origin Estimated monthly savings$813.00
Hit ratio is modeled assuming uniform request popularity across objects within each TTL window — real traffic usually follows a power-law popularity distribution (a small share of objects get most requests), which typically produces a higher real-world hit ratio than this conservative estimate.
About the CDN Cache Hit Ratio Calculator
A CDN's value is proportional to its cache hit ratio, which depends on how TTL interacts with how often content actually changes and how popular each object is. This tool estimates hit ratio, origin offload, and the resulting bandwidth cost savings from your traffic pattern.
Key Features
- Hit ratio estimate from request volume, unique object count, and TTL.
- Origin vs CDN bandwidth cost comparison.
- Pairs with Egress Shock and Vercel vs CloudFront for broader network cost planning.