Office, classroom and venue link sizing
Use the result as a check within this type of task, with the assumptions shown above.
MAXScanner Calculator
Bandwidth Calculator
Size a shared link from concurrent users, peak Mbps per active user and headroom. Compare base demand, planned Mbps, MB/s, 1 Gbps utilization and sustained transfer context.
Live editable inputs
Change the values and see the calculation update immediately.
Formula and working
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Assumptions visible
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Connected next steps
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Inputs
Results
150 Mbps
125 Mbps before headroom; 20% headroom → 150 Mbps.
125 Mbps before headroom
0.15 Gbps
18.75 MB/s
15% 1 Gbps utilization
Headroom scenarios for the same concurrent demand
| headroom | Required Mbps | Gbps | 1 Gbps utilization |
|---|---|---|---|
| 0% | 125 | 0.125 | 12.5% |
| 10% | 137.5 | 0.1375 | 13.75% |
| 20% | 150 | 0.15 | 15% |
| 30% | 162.5 | 0.1625 | 16.25% |
| 50% | 187.5 | 0.1875 | 18.75% |
Working
- 25 × 5 = 125 Mbps
- 125 × (1 + 20/100) = 150 Mbps
- 150 ÷ 1000 × 100 = 15%
More actions
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How to use this calculator
Size a shared network link from simultaneous active users, a peak Mbps allowance per active user and an explicit headroom percentage. The result separates raw concurrent demand from the extra reserve you choose and shows 1 Gbps utilization as context.
Step-by-step
- Step 1
Count users expected to be active at the same time, not every registered user.
- Step 2
Enter the peak Mbps needed by one active user or workload.
- Step 3
Add a headroom assumption and compare the resulting Mbps/Gbps target with the scenario table.
How the result is calculated
Required Mbps = concurrent users × peak Mbps/user × (1 + headroom/100).
Where this calculator is useful
Video-call or streaming concurrency checks
Use the result as a check within this type of task, with the assumptions shown above.
WAN, internet and uplink capacity planning
Use the result as a check within this type of task, with the assumptions shown above.
Common questions
Why use concurrent users instead of total users?
Bandwidth is driven by simultaneous demand. A thousand registered users do not require a thousand-user peak if only a smaller number are active at once.
What should I use for headroom?
There is no universal percentage. Headroom should reflect traffic bursts, growth, protocol overhead, service targets and the consequences of saturation on your network.
Does this size upload and download separately?
No. The entered per-user Mbps is one aggregate planning rate. Asymmetric links or direction-specific workloads should be checked against upstream and downstream capacity separately.
Need a different calculation?
Use the calculator library to switch tasks when the question, unit or assumption changes.
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