Estimation of crude oil TBP from crude viscosity

► Model for crudes TBP express estimation from crude kinematic viscosity was derived. ► Sub model for crudes pseudocomponents VBNs from their ABP was derived. ► We reported an error for prediction of crude TBP cut boiling up to 340 °C of 5.95%. ► The error for prediction of API light crudes TBP cut boiling up to 340 °C is 3.74%.