📏 Digital Level Survey Calculator

Calculate Rise & Fall, Height of Instrument (HPC) and Reduced Levels for any levelling run. Dubai EGM2008 datum.

Add Levelling Readings

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Points
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Closure (mm)

Level Book (Rise & Fall Method)

PointBSISFSRiseFallRL (m)
Level Survey Demo

🎓 How to Use This Calculator

Enter BS (Backsight) — the first reading taken to a known benchmark or turning point. Enter FS (Foresight) — the last reading before moving the instrument. Enter IS (Intermediate Sight) for intermediate points. The calculator automatically computes Rise & Fall and Reduced Levels in EGM2008 orthometric heights as required by Dubai Municipality. Closure error should be less than ±12√K mm (where K = distance in km) for Class C surveys accepted by DM.

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