Survey Calculators and Converters
Ten free tools for landowners, engineers, developers and quarry operators: check a plan's area, convert coordinates between Minna and WGS 84, estimate volumes and more.
For landowners and buyers
Check what you are buying and find the right survey.
Land Area Converter
Convert between square metres, hectares, acres, square feet and plots, with a selectable plot size.
Open the toolArea from Coordinates
Paste the beacon coordinates from a survey plan to get the area, perimeter and the bearing and distance of each side.
Open the toolWhich Survey Do I Need?
Answer two questions and we point you to the right service and request form.
Open the toolFor engineers, developers and GIS users
Everyday calculations for design, setting-out and data.
Coordinate Converter
WGS 84 latitude/longitude, UTM zones 31N–33N, the Minna datum and the Nigeria West, Mid and East Belts, plus DMS ↔ decimal.
Open the toolBearing and Distance Calculator
The bearing and distance between two points, or the second point from a bearing and distance.
Open the toolSlope and Gradient Calculator
Convert between percent, ratio (1:n) and degrees, and work out the rise over a given length.
Open the toolCut-and-Fill Volume Estimator
Earthwork volumes by the grid method or the average-end-area method.
Open the toolHorizontal Curve Calculator
Tangent length, curve length, chords and a setting-out table from the radius and deflection angle.
Open the toolFor mining and quarry clients
Quick volume and tonnage estimates.
For estate developers
Early feasibility for layouts and subdivisions.
Quick answers, honestly labelled
The tools help you plan and check. They do not replace a survey.
- Every result is labelled as indicative. Only a registered surveyor's plan counts for title, legal or design use.
- Units and the coordinate system are shown next to every answer.
- All calculations run in your browser. Nothing you enter is stored or sent.
- Each tool links to the service that turns the estimate into a reliable survey.
Need a result you can rely on?
A measured survey by our team gives you documented results for title, design and construction.