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P1dB and IP3 both describe how linear an amplifier or mixer stays as input power rises, and datasheets often give one but not the other. This calculator estimates IP3 from a P1dB value using the standard offset between the two — 9.6 dB for the theoretical case, 10 dB as the common rule of thumb, and higher for many real power amplifiers. Enter your compression point, add gain if you want both input- and output-referred numbers, and adjust the offset to match your device. The intercept diagram below shows where the estimate comes from.

Noise temperature and noise figure are two ways of stating the same thing: how much noise a component or receiver adds on its own. Datasheets mix both, so converting between them comes up constantly when you're budgeting system noise. This calculator links all three forms — noise temperature in kelvin, noise figure in dB, and noise factor as a linear ratio — so typing into any one updates the other two, with the formula worked out step by step. A chart shows where your value sits on the curve, and the noise floor section converts your noise figure into an actual noise power once you give it a bandwidth.

A single amplifier's IIP3 tells you how it handles strong signals on its own, but a receive chain is rarely one stage. Gain compounds down the chain, so a weak-linearity stage late in the chain can drag down the whole system more than a stronger one earlier. This calculator adds up your receive chain stage by stage — amplifiers and passives alike — and cascades their IIP3 and OIP3 using the standard formula, showing the signal chain and each stage's contribution to the total so you can see which one is the weak link. Run a two-tone interferer test to check the chain against a real signal, or use the preamp solver to find the IIP3 you'd need from a new stage to hit a target.

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Noise figure and gain specs assume your LNA is running linear. A strong nearby signal — an FM tower, a radar bench, a jammer — can push it into compression even if your wanted signal is weak. This calculator sums everything hitting the input, checks it against P1dB, and tells you whether you're clipping — and which signal to filter out if you are.