Strike and Dip Calculator

Calculate apparent dip from true dip and the angle between the strike direction and cross-section line.

True Dip (°)

Angle Between Strike & Section (°)

Tab to move between fields

Apparent Dip

40.89°

True Dip45°

Strike-Section Angle60°

True/Apparent Thickness Ratio0.7071

How to Use This Calculator

Enter the True Dip in degrees measured perpendicular to strike using a Brunton compass.
Enter the Angle Between Strike and Cross-Section direction for the profile you are constructing.
Review the Apparent Dip — always less than true dip unless the section is perpendicular to strike.
Check True/Apparent Thickness Ratio to correct measured thicknesses in non-perpendicular sections.
Use the result to accurately portray bedding attitudes on geological cross-sections.

How the result changes with True Dip (°)

True Dip (°): True dip angle in degrees measured perpendicular to strike. 0° = horizontal, 90° = vertical.
Angle Between Strike & Section (°): Angle between the strike direction and the cross-section line in degrees. At 90°, apparent dip equals true dip.

tan(apparent dip) = tan(true dip) × sin(angle between strike & section)

Identify Input Parameters
True Dip (°) = 45, Angle Between Strike & Section (°) = 60 = 2 input(s) provided
Calculate Apparent Dip
Apparent Dip
40.89 = 40.89
Calculate True Dip
True Dip
45 = 45
Calculate Strike-Section Angle
Strike-Section Angle
60 = 60

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