Well control Rounding Rules. 

important wellcontrol rounding rules.
these rounding rules should follow during your well control exams.
Kill Mud Weight Round Up to One Decimal Place
Maximum Allowable Mud Weight Round Down to One Decimal Place
Equivalent Circulating Density (ECD) Round Up to One Decimal Place
MAASP Round Down to Full Number
Capacity and Displacement Use First Four Decimals
Volume Use First Three Decimals
Strokes Round Up to Full Number
Final Circulating Pressure Round Up to Full Number
Pressure Drop Round Down to Full Number
Pressure Gradient Use First Four Decimals
Fracture Pressure Round Down to Full Number
Bottom Hole Pressure Round Down to Full Number