Plan temporary networks across large construction zones. Enter transmitter power, gains, and pathway losses easily. Get clear EIRP, watts, and compliance flags instantly here.
Use realistic pathway losses for accurate field estimates.
| Scenario | Tx Power | Ant Gain | Cable (m) | Losses Total | EIRP (dBm) |
|---|---|---|---|---|---|
| Site radio, short run | 1 W | 5 dBi | 20 | 3.3 dB | 31.7 |
| High mast, longer cable | 2 W | 8 dBi | 45 | 8.6 dB | 32.4 |
| Splitter feed, two zones | 1 W | 6 dBi | 30 | 7.1 dB | 28.9 |
Numbers above are illustrative for planning and documentation.
EIRP is calculated using decibel addition for gains and losses:
Tx(dBm) is converted from W, mW, dBm, or dBW.TotalLoss(dB) = CableLoss + ConnectorLoss + SplitterLoss + MiscLoss.EIRP(dBm) = Tx(dBm) + AmpGain(dB) - TotalLoss(dB) + AntGain(dBi).
Watt conversion: W = 10^((dBm - 30)/10).
Construction projects rely on temporary radios, telemetry gateways, and wireless controls that must cover changing work zones. This calculator estimates effective isotropic radiated power by combining transmitter output, optional inline gain, and antenna gain, then subtracting pathway losses. The result helps you choose safe equipment settings, compare antenna options, and communicate expected coverage to supervisors.
Use manufacturer datasheets for antenna gain and cable attenuation at the operating frequency. Measure cable length along actual routing, including slack and service loops. Count every connector, adapter, lightning arrestor, and bulkhead. Enter splitters only when one transmitter feeds multiple antennas. Keep miscellaneous losses for filters, aging, moisture, and bend radius effects.
Because decibels add linearly, small losses quickly reduce radiated power. A long cable run can cancel a high gain antenna, and several connectors can erase the benefit of an amplifier. Reviewing the loss breakdown helps field teams shorten runs, move hardware closer to the antenna, or select lower loss coax to recover margin.
Many projects include limits based on local rules, shared spectrum policies, or client standards. By entering a limit, the tool reports a pass or fail status and the remaining margin in decibels. Export the calculation to CSV for logs or to PDF for handover packages, commissioning checklists, and safety reviews.
Start with conservative power, then adjust using the margin result. Reduce loss before increasing power: shorten cable runs, minimize connectors, and avoid unnecessary splitters. If coverage is weak, consider relocating antennas higher and away from steel obstructions, then recompute. Recheck after equipment changes or when site layouts shift during phases.
For multi-tenant sites, coordinate channel plans and keep a record of antenna types, heights, and orientations. When using portable masts, note wind loading and secure anchoring. Consistent documentation reduces troubleshooting time and supports repeatable setups across crews and subcontractors during routine weekly inspections and shift handovers.
EIRP estimates how strong your signal appears if it radiated equally in all directions. It combines transmitter output, antenna gain, and pathway losses, so crews can compare setups and document expected coverage.
Cable attenuation increases with length and frequency. Even a few decibels can halve radiated power. Shorter runs, lower-loss coax, and fewer bends often improve performance more than raising transmitter power.
Use dBi when possible, because it matches the calculator input. If you only have dBd, add 2.15 dB to convert to dBi before entering it.
Use typical values from datasheets or standards: many connectors are 0.1–0.3 dB each. Splitters vary by type, but a two-way splitter is often around 3–4 dB plus connector losses.
First reduce losses: shorten cable, remove splitters, or replace damaged connectors. Then reassess antenna gain and amplifier settings. Only increase transmitter power if rules allow and margins remain negative.
Yes. Export CSV for calculations logs and trend checks, or export PDF for handover packs. Include frequency, equipment model numbers, antenna height, and any assumptions so the next crew can reproduce the setup.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.