Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.

Bulk density

Average bulk density of the overlying column in kilograms per cubic metre.

Gravity

Gravitational acceleration in metres per second squared.

Compute the vertical overburden stress gradient Sv = rho_bulk * g from average bulk density. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Overburden gradient

Overburden stress gradient in pascals per metre.

Overburden gradient

Overburden stress gradient in kilopascals per metre.

• Petroleum correlations are fluid-, pressure-, temperature-, and region-dependent. PVT sampling, phase behavior, relative permeability, capillary pressure, heterogeneity, aquifer support, well constraints, history match, and units affect forecasts and reserves.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.

• Dry Density Calculator

  Compute dry density from wet (bulk) density and gravimetric water content using rho_d = rho / (1 + w).

• Magma Density Calculator

  Bulk magma density as the volume-weighted mixture of melt and suspended crystals: rho = rho_melt (1 - phi) + rho_crystals phi.

• Overburden Stress Calculator

  Compute the geostatic (overburden) vertical stress as the product of unit weight in kN/m3 and depth in meters, giving kPa.