Bandwidth Calculator
Calculate download times for files based on your internet speed. Convert between Mbps, MB/s, and see daily transfer capacity.
Download Time
1m 22s
Speed Conversions
100
Mbps
12.5
MB/s
100K
Kbps
File Size
1,024
MB
1
GB
Daily Capacity
1054.7 GB
Monthly Capacity
31641 GB
Speed Comparison
Download times are theoretical maximums. Real-world speeds are often 10-30% lower due to overhead, network congestion, and server limitations.
Understanding Bandwidth Units
Internet speeds are measured in bits (Mbps = Megabits per second), while file sizes use bytes (MB = Megabytes). There are 8 bits in a byte, so divide Mbps by 8 to get MB/s. A 100 Mbps connection transfers about 12.5 MB/s.
Factors Affecting Speed
Advertised speeds are maximums, not guarantees. Actual speeds depend on: network congestion, distance to server, Wi-Fi interference, router quality, and how many devices are connected. Running speed tests at different times gives a realistic picture.
Improving Download Speeds
Use wired connections for large downloads. Close other applications using bandwidth. Download during off-peak hours. Consider upgrading your plan if consistently slow. Check for router firmware updates.