In hosting, “bandwidth” usually means the amount of data your website sends to visitors each month. Most small business sites use far less than people expect, often a few gigabytes to a few dozen. “Unlimited” plans always have limits somewhere, usually in a fair-use clause or in the CPU and memory you’re given. So you rarely need unlimited bandwidth. You need enough server resources, and honest terms.
Key takeaways
- Monthly data transfer is roughly page views multiplied by average page size.
- A typical brochure site uses a few gigabytes to a few dozen a month.
- “Unlimited” plans are limited by fair-use terms, CPU and memory.
- Bots, large images and self-hosted video use more data than visitors do.
What is bandwidth in web hosting?
Strictly, bandwidth is how much data a connection can carry at once, like the width of a pipe. Hosts use the word loosely to mean data transfer: the total sent from your site over a month. Every time someone loads a page, the server sends the HTML, images, fonts and scripts. Add that up across every visit and you have your monthly figure.
How much bandwidth does a small business website use?
You can estimate it in a minute:
Monthly data ≈ visits × pages per visit × average page size
For page size, the HTTP Archive’s 2025 Web Almanac found the median home page weighed 2.86 MB on desktop and 2.56 MB on mobile (Web Almanac). Using 2.5 MB as a round figure:
| Site | Visits a month | Pages per visit | Estimated data |
|---|---|---|---|
| Local tradie or clinic | 1,000 | 3 | About 7.5 GB |
| Busy service business | 5,000 | 3 | About 37.5 GB |
| Small online shop | 20,000 | 5 | About 250 GB |
These are deliberately generous. Browsers store files they’ve already downloaded and reuse them on later pages, so the server doesn’t send them again (MDN). Real usage is often lower. Your hosting control panel or analytics will show the actual figure.
What does “unlimited bandwidth” really mean?
It means the host doesn’t meter data transfer as a headline number. It doesn’t mean there’s no limit. In our experience, unlimited plans usually come with:
- A fair-use or acceptable-use clause that lets the host slow, suspend or move a site that uses “excessive” resources, without saying what excessive means.
- Tight CPU and memory limits. A shared server can only run so many page requests at once. Your site hits that ceiling long before it runs out of data.
- Limits on file counts or storage use in the fine print.
The ACCC says fine print “must not conflict with the overall message of the advertisement” (ACCC). That’s worth remembering when a headline says unlimited and the terms say otherwise. For a small business, the useful question isn’t “is it unlimited?” but “what are my CPU cores and memory, and what happens if I go over?” Our guide on how much storage, memory and CPU you need covers those numbers.
What eats bandwidth you didn’t expect?
- Bots. Crawlers, scrapers and AI bots can request more pages than real visitors. Our article on bot traffic shows how to spot them.
- Huge images. A 6 MB photo straight off a phone, shrunk on screen but sent at full size.
- Self-hosted video. One video watched a few hundred times can outweigh the rest of the site.
- Downloads. Large PDFs, price lists and brochures.
How do I keep bandwidth down?
- Resize and compress images. Usually the biggest win, because images tend to be the heaviest files on a page.
- Host video on YouTube or Vimeo and embed it, rather than uploading the file to your site.
- Turn on caching. Browser and server caching stop the same files being sent over and over.
- Block bad bots. A firewall can turn away scrapers before they cost you anything.
Image and database optimisation are included in our Elite tier of Maintain & Protect website care plans, if you’d rather not do it yourself.
How do we price hosting instead?
We don’t sell “unlimited”. Our hosting plans set out clear CPU cores, memory and disk, from Personal Essentials (1 core, 2 GB memory, 5 GB disk) at $29 a month + GST, up to VPS plans for busy shops. You can tailor resources in the plan builder. Our page on honest hosting prices lays out every tier.
If you’re comparing costs, also check annual web hosting discounts and the web hosting renewal price, not just the first month.
Frequently asked questions
Is bandwidth the same as storage?
No. Storage, or disk space, is how much your website takes up on the server: files, images and the database. Bandwidth is how much data the server sends out to visitors each month. A small site can use little storage but a lot of bandwidth if it gets heavy traffic.
What happens if my site goes over its bandwidth?
It depends on the host. Some charge for the extra, some slow the site, and some suspend it until the next month. On “unlimited” plans, the fair-use clause decides. Ask your host which applies before it happens.
How do I check how much bandwidth my site uses?
Most hosting control panels show monthly data transfer. If yours doesn’t, ask your host for the figure from the server logs. Analytics tools show visits and pages, which you can use with the formula above for an estimate.
Does a CDN reduce bandwidth?
Yes. A CDN serves copies of images and files from its own servers, so your hosting sends less. For a site whose visitors are mostly in Australia and hosted here, the gain is often modest, but it can help with traffic spikes.
Sources
- Web Almanac 2025: Page Weight, HTTP Archive, January 2026
- HTTP caching, MDN Web Docs
- False or misleading claims, ACCC