What is the difference between Mbps and MB/s?

Mbps (megabits per second) measures data transfer speed in bits, while MB/s (megabytes per second) measures in bytes. Since 1 byte = 8 bits, divide Mbps by 8 to get MB/s. For example, 100 Mbps = 12.5 MB/s. Internet plans are always advertised in bits per second.

How do I convert Mbps to MB/s?

Divide the Mbps value by 8 to get MB/s. For example: 100 Mbps ÷ 8 = 12.5 MB/s. This conversion is necessary because network speeds are measured in bits (Mbps), while file download speeds are displayed in bytes (MB/s).

How do I calculate download time?

Download time = File size (in bits) ÷ Download speed (in bps). For example, a 5 GB file at 50 Mbps: (5 × 8 × 1,000,000,000 bits) ÷ 50,000,000 bps = 800 seconds = 13.3 minutes. Use this calculator for quick estimates.

How long does it take to download a 1 GB file at 100 Mbps?

At 100 Mbps, a 1 GB file takes approximately 80 seconds (1.3 minutes). Calculation: 1 GB = 8,000,000,000 bits. 8,000,000,000 ÷ 100,000,000 = 80 seconds. Actual time may vary due to network overhead and connection stability.

> >Data Transfer Converter

Data Transfer Converter

Convert data transfer rates between bps, Kbps, Mbps, Gbps, Tbps, B/s, KB/s, MB/s, and GB/s. Enter your connection speed and file size to estimate download or upload time.

Speed

File size

Transfer Time Estimate

Transfer time: 6m 40s

5 GB at 100 Megabits per second (Mbps)

Equivalent speed: 100.00 Mbps

Common Data Transfer Speeds Reference

Technology	Speed	MB/s	1 GB download
Dial-up	56 Kbps	0.007	~39.7 hours
DSL	10 Mbps	1.25	~13.3 min
Cable	100 Mbps	12.5	~1.3 min
Fiber	1 Gbps	125	~8 sec
USB 3.0	5 Gbps	~350	~2.9 sec
Ethernet	10 Gbps	1,250	~0.8 sec

Related Calculators

External Resources

Wikipedia: Data Rate Units Wikipedia: Bit Rate Speedtest by Ookla

Frequently Asked Questions

What is the difference between Mbps and MB/s?: Mbps (megabits per second) measures data transfer speed in bits, while MB/s (megabytes per second) measures in bytes. Since 1 byte = 8 bits, divide Mbps by 8 to get MB/s. For example, 100 Mbps = 12.5 MB/s. Internet plans are always advertised in bits per second.
How do I convert Mbps to MB/s?: Divide the Mbps value by 8 to get MB/s. For example: 100 Mbps ÷ 8 = 12.5 MB/s. This conversion is necessary because network speeds are measured in bits (Mbps), while file download speeds are displayed in bytes (MB/s).
How do I calculate download time?: Download time = File size (in bits) ÷ Download speed (in bps). For example, a 5 GB file at 50 Mbps: (5 × 8 × 1,000,000,000 bits) ÷ 50,000,000 bps = 800 seconds = 13.3 minutes. Use this calculator for quick estimates.
How long does it take to download a 1 GB file at 100 Mbps?: At 100 Mbps, a 1 GB file takes approximately 80 seconds (1.3 minutes). Calculation: 1 GB = 8,000,000,000 bits. 8,000,000,000 ÷ 100,000,000 = 80 seconds. Actual time may vary due to network overhead and connection stability.
How long does it take to download a 10 GB file at 1 Gbps?: At 1 Gbps (1,000 Mbps), a 10 GB file takes approximately 80 seconds (1.3 minutes). Calculation: 10 GB = 80,000,000,000 bits. 80,000,000,000 ÷ 1,000,000,000 = 80 seconds. In practice, expect slightly longer due to protocol overhead.
What is a good internet speed?: For basic browsing and email: 25 Mbps. For HD streaming (Netflix): 50 Mbps. For 4K streaming: 100 Mbps. For gaming: 50-100 Mbps. For multiple users/4K streaming: 200+ Mbps. For heavy usage with many devices: 500 Mbps to 1 Gbps.
What does Gbps mean?: Gbps stands for gigabits per second, or billions of bits per second. 1 Gbps = 1,000 Mbps = 1,000,000,000 bps. It is commonly used for high-speed fiber optic internet connections and local network connections (e.g., Gigabit Ethernet).
How many Mbps is 1 Gbps?: 1 Gbps = 1,000 Mbps. There are 1,000 megabits in a gigabit. In bytes: 1 Gbps = 125 MB/s (1,000 Mbps ÷ 8 = 125 MB/s). This is the theoretical maximum for a Gigabit Ethernet connection.
What is the difference between Kbps and Mbps?: Kbps (kilobits per second) = 1,000 bps. Mbps (megabits per second) = 1,000,000 bps. 1 Mbps = 1,000 Kbps. Kbps is used for slower connections (dial-up: 56 Kbps), while Mbps is standard for broadband connections.
How do I test my internet speed?: Use online speed test services like Speedtest.net, Fast.com, or Google's speed test. These measure your current connection speed in Mbps. For accurate results, connect via Ethernet, close other applications, and run multiple tests at different times.
Why is my actual download speed lower than my internet plan?: Actual speeds can be lower due to: network congestion, WiFi interference, router limitations, distance from the ISP, protocol overhead (TCP/IP headers consume about 5-10%), and the server's upload capacity. ISPs often advertise "up to" speeds that may not be guaranteed.
What is the difference between upload and download speed?: Download speed is the rate at which data comes from the internet to your device (streaming, browsing). Upload speed is the rate data goes from your device to the internet (video calls, file uploads). Most plans have higher download than upload speeds, especially in cable and DSL connections.
How fast is a T1 line?: A T1 line has a speed of 1.544 Mbps (1,544 Kbps) for both upload and download. It was a standard for business internet connections before broadband became widely available. T1 lines are now mostly obsolete for internet access.
What is the maximum speed of USB 3.0?: USB 3.0 (now USB 3.2 Gen 1) has a maximum theoretical speed of 5 Gbps, which equals 640 MB/s. Actual throughput is typically 350-550 MB/s for SSDs. USB 3.2 Gen 2x2 reaches 20 Gbps (2.5 GB/s), and USB4 reaches 40 Gbps (5 GB/s).
What is the maximum speed of Wi-Fi 6?: Wi-Fi 6 (802.11ax) has a maximum theoretical speed of 9.6 Gbps across multiple channels. In real-world conditions, speeds typically range from 600 Mbps to 2.4 Gbps depending on the device, distance from router, and environmental interference.
How fast is 5G cellular?: 5G theoretical maximum speeds reach up to 20 Gbps, but real-world speeds typically range from 100 Mbps to 1 Gbps depending on the carrier, frequency band (low-band, mid-band, mmWave), and network congestion. 5G is significantly faster than 4G LTE (which averages 20-50 Mbps).
What is the difference between a bit and a byte in networking?: In networking, speeds are almost always measured in bits per second (bps), while file sizes are measured in bytes (B). This historical convention persists because network hardware processes data serially (bit by bit), while storage is addressed in bytes.
How do I calculate the time to transfer 1 TB at 10 Gbps?: 1 TB = 8,000,000,000,000 bits. At 10 Gbps (10,000,000,000 bps): 8,000,000,000,000 ÷ 10,000,000,000 = 800 seconds = 13.3 minutes. In practice, actual transfer time will be longer due to protocol overhead and other factors.
What is the difference between Mbps and MBps?: Mbps (lowercase b) = megabits per second. MBps (uppercase B) = megabytes per second. 1 MBps = 8 Mbps. The capitalization is critical: 100 MBps is 8 times faster than 100 Mbps. Network speeds use bps, while storage speeds often use Bps.
What is latency and how does it affect data transfer?: Latency is the delay before data transfer begins (measured in milliseconds). High latency doesn't reduce bandwidth but causes delays in establishing connections. For large file transfers, bandwidth matters more. For real-time applications (gaming, video calls), low latency is critical.
How many devices can a 100 Mbps connection support?: A 100 Mbps connection can typically support 4-6 devices for moderate use (streaming, browsing, video calls) simultaneously. For heavy use (4K streaming, gaming, large downloads), it may support 2-3 devices. The actual number depends on usage patterns and router quality.
What is the speed of Ethernet (100BASE-TX)?: Fast Ethernet (100BASE-TX) has a maximum speed of 100 Mbps (100 million bits per second). Gigabit Ethernet (1000BASE-T) reaches 1,000 Mbps. 10 Gigabit Ethernet (10GBASE-T) reaches 10,000 Mbps (10 Gbps).
How fast is satellite internet?: Traditional satellite internet (geostationary) offers speeds of 25-100 Mbps download and 3-10 Mbps upload with high latency (500-800 ms). Starlink (low Earth orbit) offers 50-250 Mbps with much lower latency (20-50 ms). Satellite is best for rural areas without other options.
How does fiber optic internet compare to cable?: Fiber optic internet offers symmetrical speeds (same upload/download) up to 10 Gbps, lower latency, and consistent performance. Cable internet uses coaxial cables with speeds up to 1 Gbps but typically has slower upload speeds (20-50 Mbps) and can slow during peak usage.
What is the data transfer speed of Bluetooth 5?: Bluetooth 5 has a maximum theoretical data transfer speed of 2 Mbps (megabits per second) in LE mode, or 3 Mbps in BR/EDR mode. In practice, speeds are typically 1-2 Mbps for most applications like audio streaming and file transfers.
How do I convert Kbps to Mbps?: To convert Kbps to Mbps, divide by 1,000. For example: 50,000 Kbps ÷ 1,000 = 50 Mbps. To convert Mbps to Kbps, multiply by 1,000. For example: 100 Mbps × 1,000 = 100,000 Kbps.
How long does it take to transfer 100 GB over USB 3.0?: USB 3.0 has a real-world speed of approximately 350 MB/s for SSDs. Transferring 100 GB (100,000 MB) at 350 MB/s: 100,000 ÷ 350 = 286 seconds = 4.8 minutes. For a hard drive at 100 MB/s, it would take about 17 minutes.
What affects WiFi speed in my home?: WiFi speed is affected by: distance from the router, walls and obstacles (especially concrete and metal), interference from other electronics, channel congestion from neighboring networks, the WiFi standard (WiFi 5 vs 6), and the number of connected devices.
How do I increase my internet speed?: To improve internet speed: use Ethernet instead of WiFi, restart your router, move closer to the router, reduce the number of connected devices, update router firmware, use a mesh WiFi system for larger homes, upgrade to a faster internet plan, and check for background downloads.
What is a good upload speed for video conferencing?: For standard video conferencing (Zoom, Teams, Google Meet): 3-5 Mbps upload is recommended for HD video. For 1080p HD: 5-8 Mbps. For 4K video conferencing: 15-20 Mbps. Higher upload speeds also allow for screen sharing and file transfer during calls.