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How Much Bandwidth Is Needed By Your Site? – Let’s Help You Do The Math

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One of the stickier challenges in finding a hosting solution is determining just how much server bandwidth your site will need. When you compare hosting plans, bandwidth (along with storage space) becomes much more important.

Unlike storage space, which can easily be controlled by deleting or offloading content as needed, bandwidth requires flexibility and subtle calculation. You don't want to pay for more than you need, but you also don't want to turn customers away or deal with the sometimes significant penalties for going over your allotted amount.

So how much bandwidth do you need? If you're willing to invest a little time and calculation to figure that out, you can balance both your bandwidth and your budget.

Bandwidth by the Numbers

If you're launching a new site, calculating your bandwidth is something of a shot in the dark. The best approach is to keep careful track of your site's activity for the first few months after it goes live so you can determine your actual monthly usage, and adjust your account accordingly.

For more established sites, calculating your estimated bandwidth is easy:

  1. Estimate the average page size of your site, in kilobytes (KB). If you don't know, use Pingdom's Load Time test on a few pages and take the average.

  2. Multiply this value by the monthly average number of visitors.

  3. Multiply the result from step 2. by the average number of pageviews per visitor.

Keep in mind that your calculations must include every one of your sites hosted on the server. If (for example) you run twelve domains on the same account, take the time to add up the page sizes, visitors and pageviews across all domains. (If math isn't your strong suit, MarbleHost has a basic tool that can help. It even converts the final answer into GB, making it useful for determining how much bandwidth you should buy without having to carry the decimal.)

These simple calculations should give you an idea of how much bandwidth you can expect to use, but a little more math is required. Basing your usage allotment solely on these rough estimates won't give you the whole picture; you'll need to factor in real-world challenges and opportunities.

Leaving Room to Grow

Most sites don't use much bandwidth. If you don't host large media files or do a lot of streaming, you can usually get by with under 10 GB per month. For example, a modestly-popular blog with 1000 visitors per day, a 100 kb page size, and 2 page views per average visitor will only need about 8.5 GB of bandwidth per month.

Of course, these numbers are just an estimate, and they only apply to the here and now. Since you don't want to change plans or hosts every time your data shifts, you need to plan for the future and give yourself room—and reason—to grow.

Several factors can affect the bandwidth your site consumes.

  1. Layout Changes: If you change your site's layout, you may increase the size of your page and use more bandwidth.

  2. Traffic Growth: With any luck, traffic to your site will grow.

  3. Room to Grow: As you add more pages, the number of pageviews typically increases as well, especially those from search engine spiders. And if you want to add more domains, it's usually far more convenient and affordable to do so with your existing account than by creating a new one.

  4. Traffic Spikes: Unexpected traffic spikes, like those caused by social news sites, can cause bandwidth usage to double, or even triple, in a single month.

In many ways, choosing bandwidth is a lot like buying firewood where the general rule is to collect as much as you need, and then double or triple it. With bandwidth, you'll want to multiply your estimated need five- or even tenfold.

Though you may never use more than a fraction of your allotment, you'll be spared overage bills from even the heaviest traffic. Plus, since extra bandwidth is extremely affordable when built into a service plan (certainly cheaper than paying overages or the cost of having your site shut down during a peak time), it's well worth the price. By buying extra bandwidth (and lots of it), you're not just future-proofing your hosting, but also buying the peace of mind that comes from knowing you'll be prepared for whatever comes your way.

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WhoIsHostingThis Team

About WhoIsHostingThis Team

Our writing team comes from all over the world with diverse backgrounds in the arts and sciences. But what links them is their passion for the internet. All together they represent many decades of experience working in all facets of it -- from programming and hardware creation to website design and marketing.


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April 16, 2010

Bandwidth capacity grows according to visitors and the type of content you store on your hosting server. If you host video on your host then definetly you need high bandwidth othwise average bandwidth is fine.


Al Mamun

April 3, 2015

daily i get 1k+ page views, How Much Bandwidth need.


Junaid Raza

November 15, 2015

Thank you! you have been very help, no doubt we need to consider many other things while choosing the hosting plan though but bandwidth is also important, if you ran out of the bandwidth or either your website is slow you will start facing downtime if you have too many visitors to your website which certainly leaves bad impact on visitors toward your website.



February 1, 2016

Very nice breakdown. Thank you, i have a blog currently hosted on blogger platform, but i want to move it to wordpress. I want to plan for 5k PV perday and your tutorial have been very helpful. Thank you


Faran Rajput

September 22, 2016

Very informative blog share it means 10 to 20 GB is enough bandwidth for a website thanks for the conformation.


Rizwan Ali

December 2, 2018

My website gets daily 600 plus visitors, How much bandwidth should i buy?