Jee mains obc rank marks wise Please tell marks vs rank in obc

Hello
To calculate obc rank first of all you need to
know your general rank and here are some
aprox. Data of 2k17 of jee mains rank of
general:

300 under 500 rank

250+ under 2500 rank

200+ under 10000 rank

175+ -under 20000 rank

150+ under 30000 rank

130+ under 50000 rank

110 under 80000 rank

90+ under 100000 rank

80+ under 120000 rank

And to calculate OBC rank you need to know
ur general rank let ur rank be 51000 with 128
marks then ur obc rank will be one third +-4k.
So your OBC rank would be within 13k-21k.
Hope it helps