Drilling Tools & Calculators
Free, practical calculators for the rig floor and the office — size mud weight and hydrostatic pressure, work out annular and pipe volumes, check casing capacity, and run the everyday numbers every drilling operation needs.
Hydrostatic Pressure Calculator
Find the pressure a drilling-fluid column exerts at the bottom of the hole from mud weight and true vertical depth — the psi behind every mud-weight and well-control decision
Annular Velocity Calculator
Work out the up-hole velocity of drilling fluid in ft/min from pump flow rate, hole diameter, and pipe diameter — the speed that lifts cuttings and keeps the wellbore clean
Rate of Penetration (ROP) Calculator
Turn footage drilled and rotating hours into an average ROP in ft/hr — the headline efficiency number crews use to benchmark bit runs and plan wells
Drilling Cost Per Foot Calculator
Compare bit runs on an equal footing from bit cost, rig day rate, rotating and trip hours, and footage — the classic dollars-per-foot yardstick of bit economics
Hole Volume Calculator
Convert a diameter and depth into barrels with the 1029.4 capacity factor — open-hole or pipe volume for mud systems, displacement, and cement and spacer planning
Equivalent Circulating Density (ECD) Calculator
See the effective density the formation feels while circulating, from mud weight, annular pressure loss, and TVD — key to staying inside the drilling window and avoiding losses