Vision Chart Converter Online Calculator

Visual Acuity Converter

Enter any value to instantly convert all common chart formats.

Snellen

20 /

Snellen

6 /

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Decimal Visual Acuity (VA)

LogMAR (Logarithm of the Minimum Angle of Resolution)

Please enter a valid positive number in one of the fields.

Common Equivalents

20/X (ft)	6/X (m)	Decimal	LogMAR
20/20	6/6	1.0	0.0
20/40	6/12	0.5	0.3
20/80	6/24	0.25	0.6
20/100	6/30	0.2	0.7
20/200	6/60	0.1	1.0