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.

Depth

Depth below surface in meters.

Unit weight

Average bulk unit weight of overlying material in kN/m3.

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

Vertical stress

Vertical overburden stress in kilopascals.

• 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.

• Bearing Capacity Meyerhof Calculator

  Ultimate bearing capacity of a shallow strip footing on the Meyerhof (1963) base equation qu = c*Nc + q*Nq + 0.5*gamma*B*Ngamma with Nq = exp(pi*tan(phi))*tan^2(45 + phi/2), Nc = (Nq - 1)*cot(phi) and Meyerhof's Ngamma = (Nq - 1)*tan(1.4*phi). Base equation only: no shape or depth correction factors applied. c and q in kPa, gamma in kN/m3, B in m.

• Bearing Capacity Terzaghi Calculator

  Ultimate bearing capacity of a shallow strip footing qu = c*Nc + q*Nq + 0.5*gamma*B*Ngamma. Factors: Nq = exp(pi*tan(phi))*tan^2(45 + phi/2), Nc = (Nq - 1)*cot(phi), Ngamma = 2*(Nq + 1)*tan(phi) (Vesic convention for Ngamma; Terzaghi's original third factor differs). Base equation without shape or depth corrections. c and q in kPa, gamma in kN/m3, B in m.

• Bearing Capacity Vesic Calculator

  Ultimate bearing capacity with Vesic (1973) shape and depth factors: qu = c*Nc*sc*dc + q*sq*dq + 0.5*gamma*B*Ngamma*sGamma, dGamma = 1. Factors Nq = exp(pi*tan(phi))*tan^2(45 + phi/2), Nc = (Nq - 1)*cot(phi), Ngamma = 2*(Nq + 1)*tan(phi) (Vesic convention). Shape factors sc = 1 + (B/L)*(Nq/Nc), sq = 1 + (B/L)*tan(phi), sGamma = 1 - 0.4*B/L; depth factors dq = 1 + 2*tan(phi)*(1 - sin(phi))^2*Df/B and dc = dq - (1 - dq)/(Nc*tan(phi)). c and q in kPa, gamma in kN/m3, lengths in m.