Mbps ↔ Bytes/Sec Converter

Convert between megabits per second and bytes per second instantly

Megabits per second (Mbps)

Enter Mbps value to convert to Bytes/sec

Bytes per second (B/s)

Enter Bytes/sec value to convert to Mbps

Show equivalent in other units:

Conversion Result

100 Mbps = 12,500,000 B/s

Also equals: 12,500 KB/s • 12.5 MB/s

100 Mbps can download a 1GB file in approximately 1 minute 28 seconds

Transfer Speed Comparison:

Dial-up (56 Kbps) DSL (25 Mbps) Your Speed Gigabit (1000 Mbps)

📚 Mbps ↔ Bytes/Sec Conversion Details

Mbps to Bytes/Sec Formula

Bytes per second = (Mbps × 1,000,000) ÷ 8

Convert megabits to bits (× 1,000,000), then convert bits to bytes (÷ 8).

Bytes/Sec to Mbps Formula

Mbps = (Bytes per second × 8) ÷ 1,000,000

Convert bytes to bits (× 8), then convert bits to megabits (÷ 1,000,000).

Why Divide by 8?

1 byte = 8 bits, so to convert from bits to bytes, you must divide by 8. This is the key factor in converting Mbps to Bytes/sec.

Common Uses

Internet speed testing
File transfer calculations
Network bandwidth planning
Download time estimation

📊 How This Converter Works

This is a bidirectional converter that works in real-time:

Mbps → Bytes/Sec: When you type in the Mbps field, the Bytes/sec field updates automatically
Bytes/Sec → Mbps: When you type in the Bytes/sec field, the Mbps field updates automatically
Additional Units: Choose from other speed units for equivalent values
Real-time: All calculations update as you type

// Key Conversion Factors:
1 Mbps = 1,000,000 bits per second
1 Byte = 8 bits
1 Mbps = (1,000,000 ÷ 8) = 125,000 Bytes/sec

// Example 1: 100 Mbps to Bytes/sec
100 × 1,000,000 = 100,000,000 bits/sec
100,000,000 ÷ 8 = 12,500,000 Bytes/sec

// Example 2: 50,000,000 Bytes/sec to Mbps
50,000,000 × 8 = 400,000,000 bits/sec
400,000,000 ÷ 1,000,000 = 400 Mbps

📈 Common Speed Comparison Table

Connection Type	Mbps	Bytes/sec	Download 1GB
Dial-up	0.056 Mbps	7,000 B/s	~41 hours
DSL Basic	25 Mbps	3,125,000 B/s	~5.5 minutes
Cable Internet	100 Mbps	12,500,000 B/s	~1.5 minutes
Fiber Optic	500 Mbps	62,500,000 B/s	~18 seconds
Gigabit Ethernet	1,000 Mbps	125,000,000 B/s	~9 seconds

❓ Frequently Asked Questions

Q: Why is there an 8x difference between Mbps and MB/s?

A: Mbps (megabits per second) measures bits, while MB/s (megabytes per second) measures bytes. 1 byte = 8 bits, so you divide Mbps by 8 to get MB/s.

Q: How do I calculate download time?

A: Download time (seconds) = File size in bytes ÷ Bytes per second speed. This converter shows estimated download times for common file sizes.

Q: Is 1 Mbps = 125,000 Bytes/sec exactly?

A: Yes, exactly: 1,000,000 bits ÷ 8 = 125,000 bytes. Note: 1 Mbps = 1,000,000 bits (not 1,048,576).

Q: What's the difference between MB and MiB?

A: MB (megabyte) = 1,000,000 bytes (decimal). MiB (mebibyte) = 1,048,576 bytes (binary). This converter uses decimal (MB) for consistency with Mbps.