LowVoltKit
12 free calculators live

Field math,done right.

Free field calculators for structured cabling, fiber, access control, and video. The Field Kit and Bid Kit hold the forms, workbooks, and guidebooks for running the work and the company.

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New to the trade. Voltage, cable types, NEC vs TIA, and job-site hazards.

12 calculators
Free, no login
AWG 8–26
Copper table
Four trades
Cabling, fiber, access, video

Voltage drop

V
A
ft

Voltage at the device

23.02V

Pass
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Free calculators

12 calculators for cabling, power, video, fiber, and pathways. No login.

Voltage Drop
Size copper runs, check remaining length and load, and compare a field voltage reading.
Low Voltage Load
Size access-control supplies and battery standby from device lists.
AC to DC Conversion
AC secondary to DC, and the RMS that produces a required DC.
UPS and Backup Battery
Watt rating and battery energy for rack equipment, or amp-hours for a 12 or 24 VDC panel.
Video Bandwidth
Rough camera bitrate and uplink needs for recording and viewing.
Video Storage
Retention-driven storage and RAID drive counts for NVR/VMS.
Field of View and DORI
Scene width, pixel density, and IEC 62676-4 detect through identify distances.
Conduit Fill
Check fill percent against NEC limits for EMT and PVC pathways.
Cable Tray and J-Hook
Tray and J-hook fill by area and by weight, and which limit is reached first.
Fiber Link Loss
Link loss by fiber, wavelength, connectors and splices, checked against a transceiver budget.
Subnet and CIDR
Usable range and a device assignment list from the IPv4 block IT supplied.
PoE Budget and Distance
Switch watt budget, class reservations, remaining power, and the 100 m channel.

Field Kit

The documents that win the job and run it safely: safety, training, and jobsite packs, toolbox talks, Bluebeam toolboxes, and the owner's guidebook.

$299. One purchase with one year of access.

View the Field Kit

Bid Kit

Everything in the Field Kit, plus the estimating, proposal, change order, and maintenance agreement files that win larger jobs and get them paid.

$419. One purchase with one year of access.

View the Bid Kit

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