iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Mbps means megabits per second, while MB/s means megabytes per second. The capital B matters: one byte contains eight bits, so divide Mbps by eight to convert it to the ideal equivalent in MB/s. A 100 Mbps connection therefore corresponds to 12.5 MB/s before real-world transfer conditions affect the measured result.
What do Mbps and MB/s mean?
Both are data-transfer rates: they describe how much data moves in a given time. The difference is the unit being counted:
- Mbps means megabits per second. The lowercase b stands for bits. NIST’s glossary identifies Mbps as “Megabit per second” (NIST CSRC glossary).
- MB/s means megabytes per second. The uppercase B stands for bytes.
Internet plans and many speed tests express connection rates in bits per second, while download applications commonly display the amount transferred in bytes per second. NTIA’s Broadband Reference Guide explains the distinction between connection speed in bits per second and data measured in bytes.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
How do you convert Mbps to MB/s?
One byte is eight bits. To convert a rate from megabits per second to megabytes per second, divide by eight; to convert back, multiply by eight. NTIA’s guide states the relationship as “1 byte = 8 bits.”
#1 Best Overall
- VERSATILE CABLE TESTING: Cable tester for data (RJ45) terminated cables and patch cords, ensuring comprehensive testing capabilities
- LARGE BACKLIT LCD: Backlit LCD display enables easy reading of pin-to-pin wiremap results, even in low-lit areas
- COMPREHENSIVE FAULT DETECTION: Test for Open, Short, Miswire, Split-Pair faults, Cross-over, and Shield, providing thorough fault detection
- INTUITIVE USER INTERFACE: User-friendly interface with three buttons and simple, easy-to-identify test responses, ensuring a smooth testing experience
- MULTIPLE TONE GENERATOR STYLES: Tone on a single wire, wire pair, or all 8 conductor wires using the multiple style tone generator (solid/warble); requires probe Cat. No. VDV500-123 (sold separately)
| Convert | Calculation | Example |
|---|---|---|
| Mbps to MB/s | Mbps ÷ 8 | 100 Mbps ÷ 8 = 12.5 MB/s |
| MB/s to Mbps | MB/s × 8 | 12 MB/s × 8 = 96 Mbps |
These are unit conversions, not performance guarantees. For example, the 100 Mbps to 12.5 MB/s calculation says what the rate would be if only the bit-to-byte relationship were involved.
Why does a 100 Mbps plan download at about 12 MB/s?
Because the numbers use different units. A 100 Mbps connection has an ideal equivalent of 12.5 MB/s; a download display near 12 MB/s is in the same general range, not evidence by itself that the connection is eight times slower. BroadbandNow uses a 100 Mbps plan and a download around 12 megabytes per second to illustrate this difference (BroadbandNow’s Mbps and MB/s explainer).
Rank #2
- New Upgraded Multi-function Network Cable Tester: NF-8506 TDR network tester has IP scanning, POE test, anti-interference RJ11 RJ45 CAT5 CAT6 cable test, continuity test, Ping network rate test, port flashing, sensitivity adjustment, cable Function of length test and LED flashlight.
- 200m cable length test: The NF-8506 Network cable tester is a portable cable length tester. The cable tester can accurately measure the cable length in the range of 8.2ft/ 2.5m-656ft /200m, find the cable fault distance and facilitate real-time field measurementt
- PING Tester+IP Scanner: This handheld Ping cable toner can be used to diagnose and maintain local area networks (Lans) running TCP/IP protocols. Powerful PING capabilities can verify connections, check the integrity of transmitted and received data, indicate network traffic load by measuring round-trip times and provide IP addresses
- Network Rate Test + Cable Continuity Test: Ethernet tester can quickly assess network rate issues. Conducts PING tests from multiple locations to gauge server and website response speeds. Allows users to ensure the integrity and connectivity of network cables by identifying any breaks, openings, or short circuits along the cable length.
- POE Tester: Identifies PoE devices efficiently. Detects crossover methods (unknown/end-span/mid-span/8-core power supply) and polarity. Comprehensive PoE detection, including non-standard, IEEE 802.3AF, and IEEE 802.3AT.
A measured download can differ from the ideal conversion. The conversion accounts for the size of the units; it does not account for every condition affecting a transfer. NTIA identifies bandwidth and file size as factors in transfer time, and BroadbandNow notes that actual download performance may differ from an advertised rate. There is no single overhead percentage that applies to every download.
Is Mbps a file size or a speed?
Mbps is a rate: it describes data transferred per second. A file’s size is an amount of data, usually expressed in bytes, such as MB. To estimate a download duration, you need both a file size and a transfer rate, and the result remains an estimate because actual transfer performance can vary. Keep the size and rate units distinct when comparing them.
Quick Recap
Best Value
- Multifunctional Network Cable Tester: TESMEN TLP-123A Supports RJ45 and RJ11, enabling rapid detection of line connectivity, short circuits, open circuits, miswiring, and cable shielding status. An essential tool for troubleshooting line faults and network maintenance, it effectively boosts your work efficiency
- Convenient and Efficient: Featuring one-button operation and a test speed adjustment gear on the main control unit for enhanced flexibility. Clear LED indicators provide intuitive test result displays, making it easy for both professionals and home users to operate
- Portable and Durable: Compact and lightweight design for easy portability. Constructed with high-quality plastic housing for robust structure, ensuring both durability and stability. Ideal for home wiring, IT equipment setup, electrical maintenance, and LAN DIY projects
- Detachable design: The main control unit and remote unit can be separated and used independently, allowing you to test both ends of long cables. This makes it ideal for wall-mounted ports, long-distance cabling, or structured cabling systems, perfect for homes, offices, or professional IT environments
- What you will get: 1 * TLP-123A Network Cable Tester, 1 * user manual, 2 * AAA batteries
Rank #4
- 🌹【RJ45 TESTER】：RJ45、CAT5、CAT5E、CAT6、CAT6A、RJ11/RJ12 Phone Line CAT3 (6P2C/6P4C/6P6C) POE Test/Router to Wire
- 🌹【ETHERNET TESTER】：Cable tester for detecting short circuit, open circuit, cross-pair and other cabling faults, support host and remote, can view cable remotely, maximum test distance is 1000 meters
- 🌹【QC FUNCTION】:Single-button test: quickly produce test results (open, cross, straight through, short), quickly detect PLUG crimping, ethernet continuity tester can also measure special shielded network cable (UTP/STP)
- 🌹【POE TEST】cable tester ethernet can power supply test - 60V, quickly determine the type of power supply and power supply state of the POE switch, and prompt the battery power and low voltage, LED light visual display results
- 🌹【LITHIUM BATTERY CHARGING】 ethernet cable tester rj45 NOYAFA NF-468CS is simple and easy to use, used in home, industrial and other fields
Rank #3
- The LAN cable tester can test both of the RJ11 telephone cable and RJ45 network cables such as RJ45 Cat5 Cat6 Cat7. Built-in high performance chip, which provide faster test results when checking wires and data points.
- The network provides the verification detail of wires to ensure that your networking is flowing optimally. And it will inform you whether the cables are paired and connected correctly or not.
- The network cable tester features a nice LED display which indicates. And the results that are easy for anyone to understand. It can be used by both professionals and unskilled home-users.
- Note: The cable tester needs a 9-volt battery to function. The battery is not included in the package at the time of purchase.
- If you are not satisfied with this Ethernet cable tester, please feel free to contact us. We will solve all your problems well.
What the conversion does—and does not—tell you
- It tells you the equivalent rate in a different unit. Divide Mbps by eight to express the ideal equivalent in MB/s.
- It does not predict an exact application reading. Real transfer conditions are not captured by the unit conversion alone.
- It does not combine other connection measures. Upload speed and latency are separate measures; neither is part of converting Mbps to MB/s.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
