SpeedDrain
Free · Live Conversions · Decimal & Binary

Data Unit & Bandwidth Converter

Convert instantly between bits, bytes, network speeds (Mbps, MB/s), and storage volumes (GB, GiB, TB). Discover real-world data flow per minute, hour, and day.

Popular presets:
Real-World Data Flow Capacity (100 Mbps)Includes ~9% TCP Overhead
Sustained Download Rate

~11.38 MB/s

(Theoretical: 12.50 MB/s)
Data Transferred per Minute

~683 MB

In 60 seconds
Data Transferred per Hour

~41.0 GB

In 1 hour continuous
Data Transferred per 24 Hours

~0.98 TB

Full day saturation

Conversion Across All Units (100 Mbps)

Kbps(Kilobits per second)
100,000
KB/s(Kilobytes per second)
12,500
Mbps(Megabits per second)Input
100
MB/s(Megabytes per second)
12.5
Gbps(Gigabits per second)
0.1
GB/s(Gigabytes per second)
0.0125
Tbps(Terabits per second)
0.0001

Demystifying Digital Units: Bits, Bytes, and Binary Prefixes

Why Does My 1 TB Hard Drive Only Show 931 GB in Windows?

Storage manufacturers market hard drives and SSDs using the standard metric decimal system (powers of 10): 1 TB = 1,000,000,000,000 bytes.

However, computer operating systems like Microsoft Windows calculate file storage using binary mathematics (powers of 2, specifically tebibytes or 1024^4 = 1,099,511,627,776 bytes). Dividing 1,000,000,000,000 by 1,024^3 yields approximately 931.32 GiB. You haven't lost any space; it's merely a difference in unit representation.

How to Convert Mbps to Real-World Download Speeds in Seconds

Remember the Divide by 8 Rule. If your Internet Service Provider advertises a 300 Mbps fiber line:

  1. Divide 300 by 8 = 37.5 MB/s theoretical top speed.
  2. Subtract roughly 8% to 10% for TCP packet headers and latency overhead = ~34.1 MB/s actual download speed.

At that speed, you can download a 10 GB file in under 5 minutes. Use our Download Time Calculator to see precise durations for games, movies, and archives.

Quick Reference Cheat Sheet

Broadband TierRaw MaximumRealistic SpeedHourly Transfer Volume
50 Mbps6.25 MB/s~5.7 MB/s~20.5 GB/hr
100 Mbps12.50 MB/s~11.4 MB/s~41.0 GB/hr
300 Mbps37.50 MB/s~34.1 MB/s~122.8 GB/hr
1 Gbps (1000M)125.00 MB/s~113.8 MB/s~409.7 GB/hr