How Much Hosting Bandwidth Do I Need?
Bandwidth is the amount of data transferred to visitors. You can estimate it, but caching, CDN delivery, bots, downloads, video, and traffic spikes make real usage less tidy than a simple pageviews equation.
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A rough estimate
Start with average transferred page weight × monthly pageviews, then add downloads and other large assets. Treat the result as a baseline rather than a hard capacity requirement.
What can increase usage
- Large images and downloadable files.
- Serving video directly from your web host.
- High bot traffic.
- Poor caching.
- Traffic spikes from campaigns or viral content.
CDN bandwidth changes the picture
A CDN can offload a large share of cacheable traffic from the origin. That is one reason to understand whether a host’s bandwidth figure refers to origin transfer, total traffic, or a specific allowance.
Do not overbuy from fear
Use current analytics and hosting usage as your starting point. Add sensible headroom, then scale when the data justifies it.