Centre of Circle Calculator

Enter three known points to calculate the centre coordinates and radius of the circle passing through them.

Point 1

Northing N(+)/S(-) 1 (m) Easting E(+)/W(-) 1 (m)

Point 2

Northing N(+)/S(-) 2 (m) Easting E(+)/W(-) 2 (m)

Point 3

Northing N(+)/S(-) 3 (m) Easting E(+)/W(-) 3 (m) Calculate Clear / Reset

The original Java calculation sequence is retained. Centre coordinates and radius are displayed to three decimal places.