COGO Calculator — Bearing, Distance & Area
Plane coordinate geometry on grid coordinates: join two points for bearing and distance, radiate a new point from a bearing and distance, and compute polygon area by the shoelace method — with the grid-versus-ground area note carried on every area result and the full working shown for each step. Bearings accept decimal degrees or DMS.
Free advisory field tool — every result is computed in your browser from the inputs you provide and is advisory and unverified, not for survey deliverables. Where a published guideline applies, results only ever read “within guideline” or “exceeds guideline — review”. The full working is shown for every calculation so each step can be re-checked. Registered surveyor confirmation required before reliance.
Enter both points — the bearing, distance and full working appear here.
Grid note: bearings are grid bearings (from grid north, clockwise) and joins, radiations and areas are plane computations on grid coordinates. Where ground values are needed, apply the combined scale factor — distances divide by CSF, areas by CSF² (see the Grid ↔ Ground tool in the related links).
Advisory output — confirm independently before reliance.
Safety & scope
SurveyMarkup does not certify survey accuracy, cadastral compliance, legal boundaries, or coordinate correctness. It helps prepare and review working information, but original data and final outputs must be checked by a qualified user before use.
Assistance only - professional review remains required.