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Calcimator

Bandwidth Capacity Planner

Calculate required network bandwidth from user count, application profiles, concurrency, and protocol overhead.

Inputs

%
Mbps
%

Results

Total Required Bandwidth

510 Mbps

Recommended Uplink

1,000 Mbps

Concurrent Users140
Application Bandwidth425 Mbps
Overhead85 Mbps
Uplink Utilization51 %
Per User (All)2.55 Mbps
Per Concurrent User3.64 Mbps
How to Use This Calculator
  1. Enter Total Users, Concurrency Rate, and Web/Email per User.
  2. Set VoIP Users, Video Conference Users, and Video Streaming Users.
  3. Adjust Protocol Overhead as needed.
  4. Review Total Required Bandwidth (Mbps) and Recommended Uplink (Mbps).
  5. Use Concurrent Users and Application Bandwidth (Mbps) to inform your decision.

How the result changes with Total Users

Total UsersTotal Required BandwidthRecommended Uplink
10,00116,976.4 Mbps25,000 Mbps
35,00158,976.4 Mbps100,000 Mbps
65,000109,374 Mbps100,000 Mbps
90,000151,374 Mbps100,000 Mbps

What each input means

Total Users
Total number of network users/endpoints
Concurrency Rate
Percentage of users active simultaneously during peak
Web/Email per User
Average bandwidth per user for general web, email, and cloud apps
VoIP Users
Concurrent VoIP calls (~100 kbps each)
Video Conference Users
Concurrent video conference participants (~3 Mbps each)
Video Streaming Users
Concurrent HD video streaming users (~8 Mbps each)
Protocol Overhead
Additional bandwidth for protocol headers, management, and burst capacity

How this is calculated

Formula

Total BW = Σ(Users × Rate/User) × (1 + Overhead%)

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Total Users = 200, Concurrency Rate = 70, Web/Email per User = 2, VoIP Users = 50 = 7 input(s) provided
  2. Calculate Total Required Bandwidth
    Total Required Bandwidth
    510 = 510
  3. Calculate Recommended Uplink
    Recommended Uplink
    1000 = 1000
  4. Calculate Concurrent Users
    Concurrent Users
    140 = 140
  5. Calculate Application Bandwidth
    Application Bandwidth
    425 = 425

Engine last updated . Checked against 1 independently-derived test — how we verify calculators.

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