CDN Cache Hit Ratio Calculator

Estimate cache hit ratio, origin offload, and bandwidth cost savings from fronting origin traffic with a CDN.

Requests / day

Unique objects

Cache TTL (hours)

Avg object size (KB)

Origin cost ($/GB)

CDN cost ($/GB)

Estimated cache hit ratio

97.5%

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.

CDN Cache Hit Ratio Calculator

About the CDN Cache Hit Ratio Calculator

Key Features

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