Coordinate Difference Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the easting, northing and RL of both points.
- Press Calculate.
- Read ΔE, ΔN, ΔRL and the horizontal/slope distance.
How it works
Returns the differences between two 3D coordinates plus the horizontal distance √(ΔE² + ΔN²) and the slope distance including height.
Worked example
Two survey marks. Shows how far apart they are horizontally and in 3D.
Frequently asked questions
What's the difference between horizontal and slope distance?
Horizontal distance ignores the height difference; slope distance is the straight 3D line including it.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.