What is the difference between MB and MiB?

MB (Megabyte) can mean either 1,000,000 bytes (SI standard, used by storage manufacturers and network speeds) or 1,048,576 bytes (binary, used by operating systems). MiB (Mebibyte) always means 1,048,576 bytes. This calculator uses binary (1 KB = 1,024 bytes) which matches how Windows, Linux, and macOS report file sizes.

How long does it take to transfer 1 GB at 100 Mbps?

1 GB = 8 gigabits. At 100 Mbps = 0.1 Gbps. Transfer time = 8 / 0.1 = 80 seconds. Note that real-world transfers are typically 60-80% of theoretical maximum due to protocol overhead, network congestion, and disk I/O limits.

How do I calculate AWS S3 transfer costs?

AWS charges for data transfer out of S3 in GB. Multiply your object size by the number of downloads to get total GB transferred. For example, 10,000 downloads of a 50 MB file = 500 GB transferred out = approximately $45 at $0.09/GB. Use this calculator to convert sizes and estimate costs.

What bandwidth do I need to stream 4K video?

4K streaming at 60fps requires approximately 25-50 Mbps depending on codec and compression. HDR content can need up to 100 Mbps. For live streaming, add 20-30% headroom for network variability. Use this calculator to verify your connection can handle the required throughput.

How do I calculate API response size limits?

Most API gateways (AWS, GCP, Azure) limit responses to 6-10 MB. Check your JSON response size in the browser's Network tab, convert using this calculator, and ensure you're within limits. For large payloads, consider pagination, compression (gzip reduces JSON by 60-80%), or returning URLs instead of inline data.

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Byte & Bandwidth Calculator

Convert between bytes, KB, MB, GB, TB instantly. Calculate file transfer time at any bandwidth. Free online byte and bandwidth calculator for developers and sysadmins.

About this tool

Convert between any storage units and calculate file transfer times instantly. Enter a size in bytes, KB, MB, GB, TB, or PB and see all conversions simultaneously. Then calculate how long it takes to transfer at any bandwidth — from a 1 Mbps slow connection to a 10 Gbps enterprise link. Essential for capacity planning, CDN cost estimation, network design, and API response size budgeting.

Storage Size

Bytes1,074,000,000

KB1,049,000

MB1,024

GB1

TB0.0009766

PB0.0000009537

Transfer Time

At bandwidth:

1.4m

to transfer 1 GB