GPS Accuracy Calculator

Estimate horizontal and vertical position accuracy from dilution of precision (DOP) values and User Equivalent Range Error (UERE).

Typical: ~6m civilian, ~1m SBAS-aided, 0.01-0.02m RTK

Horizontal Accuracy (1-sigma)
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Vertical Accuracy (1-sigma)
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3D Accuracy (PDOP)
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95% Horiz. Confidence
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95% Vert. Confidence
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PDOP
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DOP Quality Rating
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GPS Accuracy Estimation

Horizontal Error = HDOP x UERE

Vertical Error = VDOP x UERE

PDOP = sqrt(HDOP^2 + VDOP^2)

95% Confidence = 1.96 x sigma

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