Website Bandwidth Calculator – Monthly Traffic in GB and Peak Mbps

Website Bandwidth and Traffic Calculator

By the CalcMundi team · Updated October 22, 2026 · Formulas checked against standard financial math

Enter your monthly visitors, the pages each one views and the average page size.

Formulas

Monthly transfer = visitors × pages per visit × page size
Average bandwidth = monthly transfer × 8 ÷ seconds in a month
Peak = average × peak factor

Example

50,000 visitors viewing 3 pages of 2 MB each use 300 GB a month: 0.91 Mbps on average and about 2.7 Mbps at a peak three times the average.

How to use less

Compress images and use modern formats (WebP, AVIF).
Put a CDN in front of the site so most files are served from its cache.

Frequently asked questions

Is “unlimited bandwidth” really unlimited?

Usually there is a fair-use limit. Check your hosting terms if you serve video or large downloads.

Does the CDN traffic count?

The visitor still downloads the files, but from the CDN, not your server. The cache field shows what is left for your server.

Add this calculator to your website

Free for blogs, real estate agents, brokers and any site. Paste this code where you want the calculator to appear. It adjusts its height on its own.

<iframe src="https://calcmundi.com/embed/website-bandwidth-calculator/" title="Website Bandwidth and Traffic Calculator" loading="lazy" style="width:100%;max-width:680px;height:640px;border:0"></iframe><script>addEventListener("message",function(e){if(e.origin==="https://calcmundi.com"&&e.data&&e.data.cmH)document.querySelectorAll("iframe[src^='https://calcmundi.com/embed']").forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.cmH+"px"})})</script><p style="font:13px sans-serif">Calculator by <a href="https://calcmundi.com/website-bandwidth-calculator/">CalcMundi</a></p>

Results are estimates for information only and are not financial, legal or medical advice. Rates, taxes and fees vary — confirm with a professional or your lender.