tmmorris is of-course absolutely correct and you are probably illegal, and certainly less safe than you should be by flying as pilot in command of an aeroplane without reading and properly digesting the POH.
That said, at sea-level, ISA, hard runway, no wind, MTOW for a PA28-181 (the Archer II).
Short field TODR: 1210 ft, 369m
LDR: 1390 ft, 424m
Climb rate: 667 fpm
Glide Performance: 10 :1, 1.6 nm / 1000 ft
Best glide: 76 kn IAS
Best climb: 88 kn IAS
Now adjust them with
this A4 pdf or
this A5 pdf.
G