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Grid to True Bearing Calculator
Online grid to true bearing calculator. Convention is true bearing equals grid bearing plus supplied convergence.
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grid to true bearing calculator online
Use grid to true bearing calculator online for grid bearing deg, convergence deg. Convention is true bearing equals grid bearing plus supplied convergence. Spherical Earth radius 6371.0088 km unless another radius is displayed. Not an ellipsoidal survey or real-time navigation service.
How to use it
Enter grid bearing deg. Set convergence deg. Select Calculate and check the labeled output. Copy or download the JSON result.
Options and example settings
Calculation method
true_bearing_deg = mod(grid_bearing_deg+convergence_deg,360) (^ means exponentiation; trig functions ending in d use degrees).
Worked examples
Apply grid to true bearing calculator to the case below, keeping the displayed units and assumptions. Convention is true bearing equals grid bearing plus supplied convergence.
Grid to True Bearing Calculator — worked case
Settings: convergence deg: 2
Input:
120
Calculated result for these inputs:
Output:
{
"true_bearing_deg": 122
}Choose the right tool
Choose great-circle tools for shortest spherical paths and rhumb tools for constant bearings. Spherical models differ from ellipsoidal survey calculations. Web-map tiles have latitude limits and grid bearings require a stated convergence convention.
Limitations and common mistakes
- Convention is true bearing equals grid bearing plus supplied convergence. Spherical Earth radius 6371.0088 km unless another radius is displayed. Not an ellipsoidal survey or real-time navigation service.
- Use the displayed unit in every field. Ratios and percentages are different inputs; percent fields use values such as 25 rather than 0.25.
Frequently asked questions
How can I use grid to true bearing calculator online?
Enter grid bearing deg. Set convergence deg. Select Calculate and check the labeled output. Copy or download the JSON result.
Technical references
Where is my input processed?
The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.
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