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.

Strike

Strike azimuth in degrees clockwise from north.

Rule

Handedness relating dip direction to strike.

Convert strike azimuth and handedness to dip direction, which is perpendicular to strike (right-hand rule adds 90 degrees). 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]

Dip dir

Dip direction azimuth in degrees clockwise from north.

• Apparent dip, thickness, fault, and fold geometry depend on coordinate convention, orientation measurements, map or section geometry, exposure, projection, and assumptions about planar or cylindrical structures. Ambiguous contacts require field or 3D validation.
• 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.

• Dip Direction To Strike Calculator

  Convert a dip direction azimuth to the perpendicular strike azimuth (right-hand rule subtracts 90 degrees).

• Stratigraphic Thickness True Vs Apparent Calculator

  For a bed cropped out over width w perpendicular to strike on horizontal ground: true thickness t = w sin(delta) and vertical (apparent) thickness t_v = w tan(delta), with dip delta in degrees.

• True Thickness From Apparent Calculator

  Convert an apparent thickness measured on a vertical traverse to true bed thickness: t_true = t_apparent * cos(theta), where theta is the angle between the traverse and the dip direction.