5 Mbit/s, also written 5 Mbps, equals 0.625 megabytes per second (MB/s). Divide by eight because a byte contains eight bits. At that constant rate, a 1 GB file takes 26 minutes 40 seconds to transfer. Real downloads can take longer.
So if your connection is rated at 5 Mbps and a download shows around 0.6 MB/s, the smaller number is largely a change of units. It does not mean seven-eighths of your connection has vanished. But if a 100 Mbps connection produces only 0.6 MB/s, the unit conversion cannot explain the whole difference: that download is moving at about 4.8 Mbps.
The conversion you need
The letter matters: b means bits; B means bytes. A speed test might show Mbps while a downloader shows MB/s. Read the full label before comparing the numbers.
Mbps ÷ 8 = MB/s
MB/s × 8 = Mbps
5 Mbps ÷ 8 = 0.625 MB/s
5 MB/s × 8 = 40 Mbps
Mbps and Mbit/s mean the same thing. MB/s and MBps both mean megabytes per second. A file size alone, such as 5 MB, is an amount of data, not a speed.
The NIST reference on data units distinguishes decimal MB/GB from binary MiB/GiB. This page keeps that distinction in its calculations rather than treating the labels as interchangeable.
Convert your speed and estimate a download
Use your plan speed for an ideal estimate, or the sustained rate shown by your download for a more useful forecast. Match the units exactly.
Example: 5 Mbps = 0.625 MB/s. A 1 GB transfer takes 26 min 40 sec at that constant rate.
Transfer time only: this does not include pauses, installation or verification. It does not measure your connection. Calculations stay in this page and are not submitted to a server.
The calculator’s starting example is 5 Mbps and 1 GB. If your download window shows 0.45 MB/s, enter 0.45 and select MB/s. That uses the observed transfer rate directly; there is no need to subtract an invented “normal overhead” percentage.
Common connection speeds in MB/s
These are direct conversions, not measured download results. A plan’s advertised maximum is not a promise that every server will send one file at that rate.
| Speed in Mbps | Equivalent MB/s |
|---|---|
| 5 | 0.625 |
| 10 | 1.25 |
| 25 | 3.125 |
| 50 | 6.25 |
| 100 | 12.5 |
| 300 | 37.5 |
| 500 | 62.5 |
| 1000 (1 Gbit/s) | 125 |
There is no extra “Wi-Fi conversion.” Five megabits per second still converts to 0.625 MB/s whether the connection is wired, wireless or mobile. What changes is the throughput your device actually receives.
How long does a download take at 5 Mbps?
Use the amount you still need to download, not necessarily the game’s installed size. Installation, unpacking and file verification are separate work and can continue after the transfer finishes.
| Data to transfer | Time at a constant 5 Mbps |
|---|---|
| 100 MB | 2 min 40 sec |
| 1 GB | 26 min 40 sec |
| 5 GB | 2 hr 13 min 20 sec |
| 10 GB | 4 hr 26 min 40 sec |
| 50 GB | 22 hr 13 min 20 sec |
These examples use decimal units: 1 GB is 1,000 MB. They assume one uninterrupted transfer at the stated rate. They are planning examples, not forecasts of a particular game, provider or device.
For a decimal file size, the arithmetic is:
Seconds = file size in GB × 8,000 ÷ speed in Mbps
1 GB × 8,000 ÷ 5 Mbps = 1,600 seconds
For a closer estimate, watch a large download after its rate settles and use that sustained rate. A 1 GB file at 0.45 MB/s takes approximately 37 minutes 2 seconds. That is a different input, not a correction to the eight-bits-per-byte rule. If you are already halfway through a transfer, calculate using the remaining size.
Why a downloader might show 0.596 MiB/s
MiB/s means mebibytes per second, a binary unit. At exactly 5 Mbps, the equivalent rate is approximately 0.596 MiB/s, rather than 0.625 MB/s. The transfer has not become slower; the unit is larger.
The same distinction affects file sizes. A 1 GiB file contains 1,073,741,824 bytes, so at 5 Mbps it takes about 28 minutes 38 seconds. A 1 GB file contains 1,000,000,000 bytes and takes 26 minutes 40 seconds at the same rate.
Match the label shown by your application. If its label is ambiguous, check the application’s documentation instead of silently assuming a binary or decimal size. The calculator supports both.
Is the download actually too slow?
Start with a comparison you can trust. Record the downloader’s number and unit, then compare it with a speed test on the same device, close in time. Pause other large transfers that you control while checking. A speed test and a download use different servers, so agreement is useful evidence, not a guarantee that every file source performs equally.
| What you see | What to check next |
|---|---|
| About 0.6 MB/s on a 5 Mbps connection | The units first: this is close to the converted rate, so the number alone is not evidence of a fault. |
| One file source is slow, but another download and a speed test are much faster | Check the application’s download cap and that source’s service status before changing your home network. |
| Downloads and speed tests are both slow on one device | Compare another device, then test near the router or over Ethernet if available. This helps separate a device/Wi-Fi problem from a wider connection issue. |
| Several devices are slow at the same time | Check competing transfers, connection status and provider outages; save the test times and results for support. |
| The transfer pauses while a launcher says it is installing or verifying | Check the task being performed. A network-speed conversion does not predict installation time. |
Do not buy a faster SSD just because a 5 Mbps download shows 0.6 MB/s. At that rate, the network may already explain the transfer time. Storage can matter during copying or installation, but that is a separate question; our NVMe vs SATA guide explains why interface speeds are not the same as everyday task speeds.
For Steam-specific problems, use Steam’s official slow-download guidance. If the goal is moving an existing installation instead of downloading it again, see how to move a Steam game to another drive.
Would a faster plan solve the wait?
It can shorten a transfer when the connection is the limiting factor. As a mathematical comparison, 10 GB at 5 Mbps takes 4 hr 26 min 40 sec; at 50 Mbps it takes 26 min 40 sec. Both examples assume the full stated rate reaches that file throughout.
Before paying more, check whether your normal file sources and devices can use the faster connection. A plan upgrade does not remove a server-side cap or speed up a launcher that is busy installing files. For sending a backup, use your upload rate in the calculator; the advertised download rate does not establish the upload time.
Quick answers
Is 5 Mbps the same as 5 MB/s?
No. 5 MB/s is 40 Mbps, eight times the rate of 5 Mbps. Capital B changes the unit.
Does dividing by eight account for network overhead?
No. It converts bits to bytes. Protocol overhead, shared traffic and other limits affect the achieved transfer rate separately. There is no single percentage that reliably predicts every connection and download.
Can this calculator test my internet connection?
No. It calculates from the numbers you enter. Use a measured rate when you have one, and treat a plan-speed calculation as an ideal comparison.
What should I record before asking for help?
Keep the plan speed, downloader rate with its unit, file source, time of day, speed-test result, and whether the device used Wi-Fi or Ethernet. That makes “my download is slow” a problem someone can investigate.