Free CCTV Calculators for Security System Design
Four free tools for planning an IP camera system: field of view, DORI distances, recording storage and UPS backup. Pick a calculator below — results update instantly.
FOV Calculator
Calculate horizontal and vertical field of view angles, DORI zone distances, pixel density and blind spot from focal length, sensor format and resolution.
Open calculatorDORI Calculator
Get pixel density at your target distance and the Identify, Recognize, Observe and Detect distances defined by EN 62676-4, in metric or imperial units.
Open calculatorStorage & HDD Calculator
Estimate required HDD capacity and bandwidth for IP camera groups by resolution, FPS, compression and recording schedule.
Open calculatorUPS Battery Calculator
Work out the UPS VA rating and battery capacity for cameras, NVRs, PoE switches and access control at your target backup time.
Open calculatorReady to build your security plan?
Take these calculations further — design your full camera layout, route cables, and generate a professional PDF proposal.