Field math without the spreadsheet hunt.

Fast calculators for low-voltage, security, fiber, networking, and estimating work. Free to use and built for phones in the field.

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Use a project name to keep saved calculations, device captures, and reports together.
Quick Access

CCTV Storage Calculator

Estimate recording storage from camera count, bitrate, retention, and recording schedule.

Estimated storage—
Raw daily storage—
Estimate only. VBR, motion recording, analytics, RAID, codec efficiency, and scene activity can materially change actual requirements.

Volts / Amps / Watts Calculator

Enter any two electrical values and calculate the third using DC power: Watts = Volts × Amps.

Calculated value—
FormulaW = V × A
Useful for APs, cameras, access-control devices, power supplies, and other DC loads when a spec sheet gives only two of the three values. For AC equipment, power factor can matter, so VA and watts may not be identical.

Ohm's Law Calculator

Solve voltage, current, resistance, or power from any two known values.

Calculated value—
FormulaV = I × R
For DC resistive circuits. Electronics with regulation, inrush, inductive loads, or AC power factor may not behave like a simple resistor.

Battery Runtime Calculator

Estimate runtime for DC battery-backed loads such as access control, cameras, radios, and network devices.

Estimated runtime—
Usable energy—
Equivalent load current—
Planning estimate only. Real runtime varies with battery age, chemistry, discharge rate, temperature, inverter/DC-DC losses, and manufacturer discharge curves.

Camera Bandwidth Calculator

Estimate total CCTV network bandwidth from camera count and average bitrate.

Estimated total bandwidth—
Bandwidth incl. allowance—
Uplink utilization—
Status—
Planning estimate based on average stream bitrate. VBR spikes, substreams, analytics, multicast, recording architecture, and client viewing traffic can increase real network usage.

PoE Class / Device Load Checker

Compare a device's stated power draw against common IEEE PoE delivery limits.

Per-device result—
Headroom per device—
Total device load—
Uses approximate maximum power available at the powered device for common IEEE classes. Always confirm the exact PSE/PD specifications, cable conditions, and vendor requirements.

PoE Budget Calculator

Check whether a switch has enough PoE capacity with practical headroom.

Estimated load—
Remaining capacity—
Status—
Use device maximum draw and manufacturer specifications for final design.

Fiber Loss Budget

Estimate passive optical loss from distance, connectors, and splices.

Passive link loss—
Design budget incl. margin—
Use project standards and manufacturer limits for acceptance. Default component allowances are intentionally editable.

Voltage Drop Calculator

Quick DC copper voltage-drop estimate for common low-voltage circuits.

Voltage drop—
Voltage at load—
Percent drop—
Approximate DC copper calculation using round-trip conductor length. Confirm conductor resistance, temperature, and equipment voltage tolerance for final design.

Labor + Markup Calculator

Estimate sell price, gross profit, and margin from labor and material costs.

Total cost—
Suggested sell price—
Gross profit—
Gross margin—
Markup and margin are different. This calculator applies markup to total direct cost, then shows resulting gross margin.
CABLEMINT PRO WORKSPACE

Project work, organized.

Capture devices, review saved work, edit records, and generate project reports without mixing it into the calculator view.

Current Project No project selected Choose a project above or use one from Projects below.
PRO · DEVICE CAPTURE

Batch Device Capture

Set the job details once, scan each device label, verify the MAC/serial, save, and move straight to the next device.

Sign in to use Device Capture.
Scan device label
Fill most of the photo with the device label. CableMint reads printed MAC/S/N text and scans barcodes as supporting candidates.
Possible label values
CableMint will only auto-fill a MAC when it is explicitly tied to a printed MAC label. Tap a candidate only if you recognize it.
Privacy: the photo is processed temporarily on this device to read label data. It is not uploaded or stored by CableMint.
Use 0–9 and A–F only; leave blank if you have a serial number.
PRO · SAVED DEVICES

Current Project Devices

View, edit, and manage devices in the selected project without opening the capture form.

Choose or enter a Project / Site Name above to view captured devices.
Edit Saved Device
Use 0–9 and A–F only; leave blank if you have a serial number.
PRO · GAPS / PUNCH LIST

Project Gaps

Review field issues captured in the CableMint mobile app, including cloud photo evidence.

Choose a project above to view its Gap / Punch List.

Projects

Free: 1 project saved on this device. Pro: cloud-synced projects across devices.

Pro projects are saved to the cloud and available in the mobile app.
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