University applications are assessed, in part, on a tariff system. An A-level pass at grade E scores 40 points, with 20 extra points being added for each higher grade. (i.e. D=60, C=80, B=100, A=120).
BTEC National Diplomas are awarded with 3 grades. These are assessed as 'Pass (P)', 'Merit (M)' or Distinction (D).
Pass is equivalent to A-level grade E. Merit is equivalent to C. Distinction is equivalent to A. So, the following applies:
The lowest award (PPP) scores 120 points. (ie. it's the same as getting three E-grades at A-level).
MPP scores 160 points (equal to C, E & E at A-level).
MMP scores 200 points (equal to C, C & E at A-level)
MMM scores 240 points (equal to C, C, & C at A-level)
DMM scores 280 points (equal to A, C & C at A-level)
DDM scores 320 points (equal to A, A, & C at A-level)
DDD scores 360 points (equal to A, A & A at A-level)
Therefore, taking a BTEC National Diploma is, as far as the universities are concerned, equivalent to taking 3 A-levels.
Source:
http://www.ucas.com/candq/tariff/index.html
Chris