Babban Ka'idar Dangantaka ita ce ka'idar kimiyya da Albert Einstein ya gabatar a cikin 1915 wanda ke bayyana yanayin nauyi da alakar sararin samaniya da lokaci. A cewar wannan ka'idar, nauyi ba ƙarfin da ke aiki daga nesa ba ne, a'a, karkatar da lokacin sararin samaniya ne sakamakon kasancewar manyan abubuwa. Ka'idar ta kuma annabta cewa lokaci yana da alaƙa kuma cewa tasirin nauyi na iya haifar da lokaci ya wuce sannu a hankali a cikin filaye masu ƙarfi. Babban Ka'idar Dangantaka ana ɗaukarsa ɗaya daga cikin mafi mahimmancin binciken kimiyyar lissafi na zamani kuma yana da tasiri mai zurfi akan fahimtarmu game da sararin samaniya.