Download Time Calculator

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

Enter the file size and your internet speed to see how long the download takes.

Formula

Time = size in bits ÷ speed in bits per second. Internet speed is measured in megabits (Mbps) and files in megabytes (MB). A byte is 8 bits, so 100 Mbps downloads at most 12.5 MB per second.

Example

A 50 MB file at 100 Mbps takes 4 seconds. A 4 GB game takes 5 min 20 s at full speed.

Why it takes longer in real life

Wi-Fi far from the router, other devices on the network and the server you download from can all slow it down. That is why we also show the time at 80% and 50% of the speed.

Frequently asked questions

Mbps vs. MB/s?

Mbps is megabits per second; MB/s is megabytes per second. Divide Mbps by 8 to get MB/s.

What about uploads?

Same math, using your plan’s upload speed, which is usually lower.

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/download-time-calculator/" title="Download Time 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/download-time-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.