About the Bandwidth Calculator
Bandwidth needed for a number of concurrent users, streams or a monthly data allowance.
Also known as: bandwidth requirement, internet speed needed, concurrent users bandwidth, network capacity.
How to use this calculator
- Enter calculate from and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
bandwidth = users × per-user rate × (1 + headroom)
Worked example
Using the values pre-filled in the calculator above:
- Calculate from: Concurrent users
- Concurrent users = 20
- Bandwidth per user = 5 Mbps
- Contention / headroom = 30 %
the calculator returns:
- Bandwidth required: 130 Mbps
- Raw demand: 100 Mbps
- In Gbps: 0.13
- Recommended link: 500 Mbps