Free survey calculators
Practical tools for Australian surveyors: MGA2020 coordinates, grid bearings, areas, traverses, level books and fee proposals.
These tools run in your browser and nothing you enter is uploaded. No account is needed. Check results independently before relying on them for survey work.
- MGA2020 converter
Convert GDA2020 latitude and longitude to MGA2020 grid coordinates and back.
- Bearing and distance
Find the bearing and distance between two points, or radiate a new point.
- Area from coordinates
Work out area and perimeter from grid coordinates.
- Traverse misclose
Check a traverse misclose and calculate a Bowditch adjustment.
- Rise and fall
Reduce a level book and check it against a closing benchmark.
- Survey fee proposal template
Write the scope, fees and terms, then print or save your proposal as a PDF.
How the calculators work
Each calculator page names its method and has a worked example you can load and check. The MGA2020 converter uses the Karney (2011) Krueger series on the GRS80 ellipsoid. The area calculator uses the shoelace formula, the traverse calculator applies the Bowditch rule to the misclose, and the level calculator uses the rise and fall method with its three arithmetic checks. The fee proposal template rounds each line to the cent and works out GST once on the total.
Worked example from the MGA2020 converter: latitude −27.4478°, longitude 153.1667° is easting 516473.169 m, northing 6963954.160 m in zone 56.
Coordinates in Queensland
Queensland falls in MGA zones 54, 55 and 56, and Brisbane is in zone 56. The MGA2020 converter picks the zone from the longitude, or you can choose it.
Keep the fee proposal, crew bookings, field and office hours and staged invoices for each survey job together in BackSight.
BackSight for survey firms