Free oilfield calculators
Quick drilling calculations with the formulas shown, for learning and practice. Results update as you type.
Field units
Hydrostatic pressure
5,200 psi
Pressure gradient
0.52 psi/ft
psi = 0.052 × mud weight (ppg) × TVD (ft)
Metric units
Hydrostatic pressure
35,316 kPa
In bar
353.2 bar
P = density × 9.81 × TVD (Pa); ÷ 1,000 for kPa
For training and learning only. Always check calculations against your company's procedures and approved software. Learn the theory in Drilling Operations Fundamentals.