Hydrostatic Pressure from Mud Weight Calculator
Enter mud weight in ppg and true vertical depth in feet. The calculator returns hydrostatic pressure in psi.
Calculation context and source notes
Hydrostatic pressure from mud weight calculates the pressure exerted by a drilling-fluid column at true vertical depth using the standard oilfield 0.052 conversion factor.
Use it for well-control checks, bottomhole pressure estimates, equivalent mud weight comparisons, and quick pressure-balance calculations in US field units.
Solves for
HP (psi)
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Formula, variables, and sourceRelated source-backed guides
Formula, variables, and default calculation
Reproducible default result
With the default values shown below, the calculation returns HP = 5,200 psi. Defaults demonstrate the implementation; they are not recommended field values.
10
10000
Input definitions
MW
ppgMud Weight
TVD
ftTrue Vertical Depth
Output definitions
HP
Hydrostatic Pressure
MW
Mud Weight
TVD
True Vertical Depth
Engineering use, assumptions, and limits
Use it for well-control checks, bottomhole pressure estimates, equivalent mud weight comparisons, and quick pressure-balance calculations in US field units.
Assumptions
- Mud weight is uniform over the measured fluid column.
- Depth is true vertical depth, not measured depth.
- The 0.052 factor is used for ppg, ft, and psi field units.
Limitations
- Does not include surface pressure, friction losses, swab/surge effects, or gas-cut mud.
- Not a full well-control kill-sheet calculation.
Common mistakes
- Using measured depth instead of true vertical depth.
- Mixing SI and field units with the 0.052 constant.
- Applying the result without adding or subtracting surface pressure where required.
Source and record status
Source metadata identifies the relationship implemented by the calculator. Check the cited edition, unit basis, and scope against the engineering case before operational use.
SLB Energy Glossary. Hydrostatic pressure.
Open source reference