Datum Shift Magnitude Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserIntermediate
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the ΔX, ΔY and ΔZ of the datum shift (metres).
- Press Calculate.
- Read the total shift magnitude.
How it works
Returns the size of a datum shift as the 3D magnitude √(ΔX² + ΔY² + ΔZ²).
Worked example
ΔX 0.06, ΔY −1.5, ΔZ 1.2. Magnitude ≈ 1.92 m.
Frequently asked questions
What is a datum shift?
The offset between two reference datums (e.g. WGS84 vs a national datum). This tells you how far apart the same point sits between them.
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.