Bandwidth Calculator
Plan network capacity and determine required throughput for concurrent video streams, remote workers, and continuous server replication.
Quick Calculation: Calculate data transfer throughput, determine required internet bandwidth for multiple users, and plan network infrastructure requirements. At typical speeds, calculations account for TCP packet framing, Wi-Fi contention, and server delivery caps.
How Download Time Is Calculated
Bandwidth = Data Volume / Target DurationBandwidth defines maximum theoretical data throughput per unit of time across a physical or wireless transmission channel.
Convert to Bits
Multiply file size in Bytes by 8 to get total bits: 100 GB × 8,000,000,000 bits
Apply Speed & Overhead
Multiply network speed by real-world efficiency (typically 90% due to TCP/IP packet headers): 1 Gbps × 0.90
Divide to Find Duration
Divide total bits by effective throughput: 13 min 20 sec (theoretical) / 14 min 49 sec (with 90% real-world efficiency)
Bandwidth Calculator — Reference Table
Compare estimated durations for popular file sizes across common broadband bandwidths.
| File Size | 10 Mbps | 25 Mbps | 50 Mbps | 100 Mbps | 200 Mbps | 500 Mbps | 1 Gbps |
|---|---|---|---|---|---|---|---|
| 100 MB | 1 min 29 sec | 36 seconds | 18 seconds | 8.9 seconds | 4.4 seconds | 1.8 seconds | 889 ms |
| 500 MB | 7 min 24 sec | 2 min 58 sec | 1 min 29 sec | 44 seconds | 22 seconds | 8.9 seconds | 4.4 seconds |
| 1 GB | 14 min 49 sec | 5 min 56 sec | 2 min 58 sec | 1 min 29 sec | 44 seconds | 18 seconds | 8.9 seconds |
| 5 GB | 1 hr 14 min 4 sec | 29 min 38 sec | 14 min 49 sec | 7 min 24 sec | 3 min 42 sec | 1 min 29 sec | 44 seconds |
| 10 GB | 2 hrs 28 min 9 sec | 59 min 16 sec | 29 min 38 sec | 14 min 49 sec | 7 min 24 sec | 2 min 58 sec | 1 min 29 sec |
| 25 GB | 6 hrs 10 min 22 sec | 2 hrs 28 min 9 sec | 1 hr 14 min 4 sec | 37 min 2 sec | 18 min 31 sec | 7 min 24 sec | 3 min 42 sec |
| 50 GB | 12 hrs 20 min 44 sec | 4 hrs 56 min 18 sec | 2 hrs 28 min 9 sec | 1 hr 14 min 4 sec | 37 min 2 sec | 14 min 49 sec | 7 min 24 sec |
| 100 GB | 1 day 41 min | 9 hrs 52 min 36 sec | 4 hrs 56 min 18 sec | 2 hrs 28 min 9 sec | 1 hr 14 min 4 sec | 29 min 38 sec | 14 min 49 sec |
Frequently Asked Questions About Bandwidth Calculator
What is the difference between bandwidth and internet speed?
Bandwidth is the maximum capacity or volume of data that can pass through a pipe per second, while speed represents how rapidly packets travel from source to destination.