NetTools

Bandwidth Calculator

Users × per-user rate — quick capacity planning for a network link.

Concurrent users

Per-user rate (Mbps)

Total bandwidth (Mbps)

250

Video streaming and calls need much more per-user bandwidth than basic browsing — adjust the rate for your actual use case.

What you entered

Concurrent users: 50Per-user rate (Mbps): 5

1
Total bandwidth = users × per-user rate
50 × 5 Mbps= 250 Mbps

Result

Total bandwidth (Mbps): 250

50 concurrent users at 5 Mbps each need 250 Mbps of total bandwidth.

Bandwidth needed by concurrent users

Total bandwidth is concurrent users multiplied by the throughput each one needs. 5 Mbps per user covers HD video; 2-3 Mbps covers browsing and calls.

Concurrent users	Per user	Total needed
10	5 Mbps	50 Mbps
50	5 Mbps	250 Mbps
100	5 Mbps	500 Mbps
100	10 Mbps	1,000 Mbps
500	3 Mbps	1,500 Mbps
1,000	2 Mbps	2,000 Mbps

This sizes for everyone active at once. Real offices rarely hit full concurrency, so many designs provision 40-60% of this and rely on statistical multiplexing.

Peak, not average, is what matters

Size your bandwidth for peak concurrent usage, not average usage across the day — a link that's fine most of the time but chokes during your busiest hour still causes real problems.

Different activities need very different rates

Basic web browsing might need under 1 Mbps per user; HD video streaming or video calls can need 5-25 Mbps per user — use a realistic per-user rate for your actual use case, not a generic default.

Frequently asked questions

We have 50 employees on video calls — how much bandwidth do we need?

At roughly 5-10 Mbps per concurrent video call, 50 users on HD video calls need 250-500 Mbps of dedicated bandwidth. Add headroom for other traffic — a 1 Gbps symmetric connection would handle this comfortably.

What's the difference between bandwidth and speed?

Bandwidth is total capacity (like a highway's lane count), while speed refers to how fast a single transfer moves. High bandwidth lets many users share the connection simultaneously without each one slowing down.

Should I calculate for average or peak usage?

Always size for peak concurrent usage. A connection that works fine at 2 AM but chokes at 10 AM during meetings still causes real problems. Use peak-hour concurrent user counts, not daily averages.

How does this compare to the download time calculator?

This calculator sizes a network link for multiple simultaneous users. The download time calculator estimates how long a single file takes to transfer at a given speed — different questions, complementary tools.