Bandwidth Calculator
Estimate a website’s monthly data transfer and average and peak bandwidth from visitors, pages per visit and page weight.
Your inputs
Results
Monthly transfer
450 GB
- Average bandwidth
- 1.389 Mbps
- Estimated peak bandwidth
- 4.167 Mbps
≈Estimate based on the stated model and assumptions
Notes for this result
- A CDN and caching can greatly reduce origin bandwidth.
What this calculator does
Hosting plans and CDNs bill by data transfer. This estimates your monthly needs from traffic.
Formula and method
Monthly bytes = visitors × pages × page size × redundancy; average bandwidth = bytes × 8 ÷ seconds in 30 days
Worked example
Calculated by this tool with its default inputs:
Inputs
- Visitors per month: 50000
- Pages per visit: 3
- Average page weight: 2 MB
- Redundancy factor (bots, retries, growth): 1.5
- Peak-to-average traffic ratio: 3
Results
- Monthly transfer: 450 GB
- Average bandwidth: 1.389 Mbps
- Estimated peak bandwidth: 4.167 Mbps
How to read the results
Peak bandwidth matters for capacity; monthly transfer matters for billing.
Assumptions and limitations
- Caching and CDNs reduce origin traffic.
Questions
What is page weight?
The total size of everything a page loads: HTML, images, scripts and fonts.
Methodology and verification
- Result type
- Estimate based on the stated model and assumptions
- Formula version
- 1.0
- Automated verification
- 2 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
- Editorial review
- Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.
Privacy
Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy