There is no single "ISFP socionics type." The two systems are cousins, not twins — so an ISFP lands on one of 3 socionics types, and only your answers can say which. The candidates and their starting weights, stated openly:
Most ISFPs land on SEI, at ease in the present and its pleasures. ESI fits the principled defender of people, and some land on SLI.
The mechanical rule you'll see elsewhere — keep the letters, flip j/p for introverts — maps ISFP to ESI (socionics ISFj). It assumes the two systems measure the same four dichotomies the same way. They don't quite: socionics builds its types from eight function positions, MBTI from four letter preferences, and the correspondence between them is genuinely contested — which is why every ≈MBTI equivalence on this site carries an asterisk (method §1).
The conversion test treats your MBTI as evidence rather than an answer: ISFP opens the candidate set above, ~20 targeted questions decide between the candidates, and if your answers point somewhere else entirely, they overrule the starting point — with a warning that says so.
Your answers decide between SEI · ESI · SLI.
Take the 8-minute conversionWhichever candidate wins, the result is scored twice: MODEL A is the classical verdict; MODEL G is Gulenko's school reading the same answers as energy rather than information. When they split, you see the split — margins included, free. New to all of this? the basics →