High-frequency　inductors　are　important　devices　in　power　converters.　The　parasitic　capacitance　not　only　affects　the　electromagnetic　interference　suppression　effect　of　filter　inductors,　but　also　causes　efficiency　degradation　and　other　problems.　In　order　to　predict　the　impedance　characteristics　of　high-frequency　inductors,　this　paper　proposes　a　method　to　accurately　calculate　the　parasitic　capacitance　of　inductors.　Firstly,　the　effect　of　the　winding　structure　parameters　on　the　electric　field　distribution　between　adjacent　turns　is　investigated.　Then,　the　calculation　method　is　optimized,　which　can　be　used　to　accurately　describe　the　electric　field　distribution.　Secondly,　the　effect　of　core　parasitic　capacitance　on　the　total　capacitance　is　further　investigated.　Finally,　a　calculation　method　for　the　parasitic　capacitance　of　high-frequency　inductors　is　established.　In　the　experiments,　the　impedance　test　and　finite　element　simulation　are　used　as　references　to　compare　the　calculation　results.　The　maximum　calculation　error　is　only　within　5.05%,　which　verifies　the　validity　and　accuracy　of　the　proposed　calculation　method.　©　2025　China　Power　Supply　Society.　All　rights　reserved.