Oilfield calculators & formulas
Every formula RIGCALC runs, explained with a worked example. Read the guide, then open the calculator to run your own numbers in Field or Metric units — online or offline.
Kill Mud Weight Calculator
Kill mud weight, ICP, FCP & MAASP from shut-in data.
Read guideKill Sheet Calculator
Full Driller's / Wait & Weight kill sheet with pressure schedule.
Read guideKick Tolerance Calculator
Max kick height & volume before breaking down the shoe.
Read guideTubing Movement Calculator
Hooke's law stretch, piston, ballooning and thermal effects.
Read guideDogleg Severity & Minimum Curvature Calculator
DLS, dogleg angle, ΔTVD, ΔN and ΔE between survey stations.
Read guideTorque & Drag Calculator
Soft-string hookload for POOH, RIH and rotating, plus torque.
Read guideFree Point Calculator
Depth of stuck point from pipe stretch and pull.
Read guideFishing Calculator (Pipe Yield, Safe Pull, Jar Impact)
Pipe body yield, safe overpull and jar impact force.
Read guideCasing Burst & Collapse Calculator
Barlow burst and yield collapse ratings.
Read guideHydrostatic Pressure Calculator
Hydrostatic pressure from mud weight and TVD.
Read guidePipe & Annular Capacity Calculator
bbl/ft capacities, volumes and pump strokes.
Read guideMud Weight-Up & Dilution Calculator
Barite sacks to weight up, water to weight down.
Read guideCement Slurry Volume & Sacks Calculator
Slurry volume, sacks, mix water and displacement.
Read guideCasing Design Wizard
Pick casing that meets burst, collapse and tension.
Read guide