How is file transfer time calculated?

Transfer time = File size / Bandwidth. For example, a 1GB file at 100 Mbps takes about 80 seconds (accounting for bits vs bytes: 1GB = 8Gb).

What's the difference between Mbps and MB/s?

Mbps (megabits per second) is used for network speeds. MB/s (megabytes per second) is used for file sizes. 1 MB/s = 8 Mbps.

Why is my actual transfer slower?

Real-world transfers include protocol overhead (TCP/IP headers), latency, packet loss, and shared bandwidth. Actual speeds are typically 70-90% of theoretical.

Bandwidth Calculator

Calculate file transfer times and convert bandwidth units.

File Size

Bandwidth

Common Bandwidth Speeds

Connection Type	Typical Speed	1 GB Transfer
Dial-up	56 Kbps	~40 hours
DSL	10 Mbps	~13 min
Cable	100 Mbps	~80 sec
Fiber	1 Gbps	~8 sec
10G Ethernet	10 Gbps	~0.8 sec

📘 How It Works

Unit Conversion

Converts between bits and bytes (8 bits = 1 byte) and between metric prefixes (K, M, G, T).

Transfer Time

Calculates time by dividing file size by bandwidth: (size in bytes × 8) / (bandwidth in bits per second).

Required Bandwidth

Calculates needed speed by dividing file size by target time: (size in bytes × 8) / (time in seconds).

💡 Common Use Cases

Download Planning

Estimate how long a large download will take on your connection.

Upload Scheduling

Plan backup windows and file sync schedules based on available bandwidth.

Infrastructure Sizing

Determine required network capacity for data transfer requirements.

SLA Verification

Verify if your ISP provides the advertised bandwidth speeds.

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