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Calcimator

Access Control Calculator

Calculate readers, controllers, credentials, and costs for a physical access control system based on door count, users, and reader technology.

Inputs

Results

Readers needed

4

Total system cost ($)

$8,275.00

≈ 8 smartphones

Access controllers1
Credentials to order55
Monthly maintenance ($)$15.00
Cost per door ($)$2,069.00
How to Use This Calculator
  1. Enter the number of controlled doors and total users.
  2. Select reader type (standard proximity, smart card, or biometric) based on security requirements.
  3. Set redundancy level (none, single backup, or full redundancy) for system resilience.
  4. Review total readers, controllers, total credentials, and total system cost.
  5. Add annual maintenance (typically 15-20% of system cost) to your operational budget.

What each input means

Controlled doors
Number of doors requiring electronic access control (card/fob/biometric readers).
Total users
Number of people who need access credentials in the system.
Reader type (0-2)
0 = Proximity/RFID card ($250/ea), 1 = Keypad + proximity ($450/ea), 2 = Biometric ($1,200/ea).
Redundancy level (0-2)
0 = No redundancy, 1 = One backup controller, 2 = Full controller redundancy (double).

What each result means

Readers needed
Total card/biometric readers required (one per controlled door).
Access controllers
Door controller panels needed (each handles up to 4 doors).
Credentials to order
Cards/fobs including 10% spares (min 5 spare).
Total system cost ($)
All-in estimate: readers, controllers, credentials, wiring, software license, and installation labor.
Monthly maintenance ($)
Estimated monthly maintenance/support contract (8% of hardware cost annually).
Cost per door ($)
Average fully loaded cost per controlled door.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Controlled doors = 4, Total users = 50, Reader type (0-2) = 0, Redundancy level (0-2) = 0 = 4 input(s) provided
  2. Calculate Readers needed
    Readers needed = doors * readersPerDoor
    4 = 4
  3. Calculate Total system cost
    Total system cost = readerCostTotal + controllerCostTotal + credentialCostTotal + wiringCostTotal...
    8275 = $8,275
  4. Calculate Access controllers
    1 = 1
  5. Calculate Credentials to order
    Credentials to order = users + spareCredentials
    55 = 55

Engine last updated .

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