CCTV Calculator and Tools

Contains adsIn-app purchases
159 reviews
Content rating
Everyone
50K+
Downloads
Content rating
Everyone
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About this app

CCTV Calculator brings together the calculations and tests you need to design, install and maintain camera systems — in one app. Pick the right lens, check what each camera will really see, size the storage and the UPS, test ONVIF devices and plan the network, before and after installation.

CAMERA SYSTEM CALCULATIONS
- Storage Calculator — disk capacity for your NVR/DVR. Mix camera types in groups, enter a known bitrate, account for smart codecs (H.265+/H.264+) and recording hours per day
- Bandwidth Calculator — the bandwidth your recording settings require
- Lens Focal Length Calculator — pick the right lens for your target area
- Camera Viewing Angle
- FOV & DORI Planner — coverage, pixel density and the Detect / Observe / Recognise / Identify distances of a camera (EN 62676-4)
- DORI Calculator — how far each DORI level reaches, and the lens or resolution needed for a target distance

NETWORK AND WIRELESS CALCULATIONS
- IPv4 Calculator
- IPv6 Calculator
- Free Space Path Loss
- Power Budget Calculator
- System Performance Calculator
- Fresnel Zone
- mW to dBm Calculator

SERVER AND RAID CALCULATIONS
- RAID Calculator — usable space, redundancy and fault tolerance for your disk count

POWER
- UPS Calculator — size the UPS and battery for your cameras, NVR and network devices, and see the runtime for your backup time

TOOLS
- ONVIF Compatibility Test — check login, device details and RTSP stream addresses, and find ONVIF devices on your network
- Port Forwarding Test
- Ping Test
- Network Discovery — automatically find devices on your network
- WAN Port Scanner
- What is my IP?
- More Network Tools

KNOWLEDGE BASE
- CCTV Default Login Informations
- CCTV Terms and Definitions — current, searchable glossary
- Security Assessment of CCTV — common weaknesses and how to fix them
- RJ45 Cable Wiring

Metric and imperial units are supported.

PRO
- Live results: calculations update as you type, with quick sliders
- Charts and diagrams: FOV and DORI diagrams, pixel preview, retention, runtime and comparison charts
- Camera groups in the Storage Calculator and ONVIF device discovery
- No ads and unlimited calculations
Monthly or yearly subscription; cancel anytime in Google Play.
Lens, DORI, storage, UPS and network calculators for CCTV installers.
Updated on
Sep 27, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Financial info
  • This app may collect these data types
    Financial info and Device or other IDs
  • Data isn’t encrypted
  • Data can’t be deleted

Ratings and reviews

154 reviews
Paul Green
December 14, 2023
Already too many adverts and only use it for 30 seconds. Big limited to 8 megapixel cameras means I cannot include fish eyes. Does not work for premacies with multiple different cameras with different resolution
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Alex Cole
February 1, 2025
Kept crashing as I was opening any menu options for the first time.
1 person found this review helpful
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A Google user
November 2, 2019
Very good tools but hope you make a version "pay" it out ads thank you.
8 people found this review helpful
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KARELab
November 3, 2019
Thank you for your comments, we will push pro version with no ad.

What’s new

We continue to improve the CCTV Calculator and Tools app for you! In this version, to provide you with a better experience;
- New: FOV & DORI Planner and DORI Calculator
- New: UPS Calculator in the new Power section
- Storage: camera groups, known bitrate, smart codecs, recording hours
- ONVIF test rebuilt: RTSP addresses and device discovery
- Updated glossary and security guide
- Metric/imperial units
- New design on every screen, clearer error messages