GPS Accuracy Estimator

Estimate GPS/GNSS positional accuracy from satellite geometry (GDOP/PDOP), correction method, and environmental factors.

GDOP Value

Receiver UERE

Satellites Tracked

Correction Method

Elevation Mask

Multipath Environment

Tab to move between fields

Horizontal Accuracy (95%)

6.72 m

Vertical Accuracy (95%)

8.16 m

Horizontal (feet)22.05 ft

Vertical (feet)26.77 ft

3D Position Accuracy10.57 m

HDOP1.12

VDOP1.36

Geometry QualityExcellent

Correction MethodStandalone GPS

Suitable ForRecreation / navigation

How to Use This Calculator

Enter the number of visible satellites and the PDOP (position dilution of precision) value.
Set the GPS equipment type (L1 only, L1/L2, RTK, or GNSS network).
Input the observation duration and whether differential correction is applied.
Review the Estimated Horizontal Accuracy and Vertical Accuracy in feet or centimeters.
Check the Accuracy Class output to confirm the survey meets the required precision standard.

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Related Calculators

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Convert between map distance and ground distance at a given scale ratio. Includes accuracy standards and scale classification.

Calculate bearing (azimuth and quadrant) and horizontal distance between two survey coordinate points.

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