RF Link Budget Calculator | Free Online Tool

How RF Link Budget Calculator works

RF Link Budget Calculator calculates received power from the supplied parameters, with live validation, a readable formula note, and local browser processing.

Calculation model

Combines transmit power, antenna gains, and total path loss.

Recommended workflow

Confirm every field uses the displayed unit.
Adjust the example values and review the live result and input summary.
Copy the result, then document assumptions and verify requirements before use.

Use cases

Use it for planning, comparison, documentation, and quick checks involving transmit power, tx antenna gain, rx antenna gain, total path loss.

Limits and verification

The calculation follows this stated model: Combines transmit power, antenna gains, and total path loss. Real projects may require additional coefficients, tolerances, taxes, codes, or professional review.

Frequently Asked Questions

Does RF Link Budget Calculator upload my values?

No. The calculation runs in the current browser tab and ToolHub does not receive or store the values you enter.

What does RF Link Budget Calculator calculate?

Received power from transmit power, tx antenna gain, rx antenna gain, total path loss.

Can I use the result in a real project?

Does it work on phones?

Yes. The input and result workspace adapts to mobile, tablet, and desktop screens.

Why can my result differ from another source?

Differences usually come from units, rounding, assumptions, local rules, or coefficients used by the other source.

RF Link Budget Calculator: inputs, output, and reproducible example

RF Link Budget Calculator calculates received power from the supplied parameters, with live validation, a readable formula note, and local browser processing.

What this page actually processes

Field	Control	Default example	Validation role
Transmit power	Number	`20`	Transmit power is read by the browser as a number value before the tool runs.
TX antenna gain	Number	`5`	TX antenna gain is read by the browser as a number value before the tool runs.
RX antenna gain	Number	`5`	RX antenna gain is read by the browser as a number value before the tool runs.
Total path loss	Number	`110`	Total path loss is read by the browser as a number value before the tool runs.

Reproduce the built-in example

Start with Transmit power = 20; TX antenna gain = 5; RX antenna gain = 5; Total path loss = 110, then run RF Link Budget Calculator. Change one input at a time so the effect on the result remains traceable.

After validating transmit power, tx antenna gain, rx antenna gain, total path loss, the page displays its result in the output workspace and enables the relevant copy or download action.

Formula and variable relationship

Combines transmit power, antenna gains, and total path loss. The implemented expression is “tx+gt+gr-loss”. The page validates transmit power, tx antenna gain, rx antenna gain, total path loss before formatting the result in dBm.

Sensitivity check: change only transmit power from 20 dBm to 22 dBm. With every other input unchanged, received power moves from -80 to -78 dBm. This provides a reproducible input-to-result check.

When to use it and how to interpret the result

RF Link Budget Calculator is intended for workflows involving Transmit power, TX antenna gain, RX antenna gain, Total path loss.

Limits and checks before use

Combines transmit power, antenna gains, and total path loss.

Page verification record

Controls inspected4 documented inputsResult pathValidate → process → review → copy/downloadLast content review2026-09-02