Visual Acuity Converter
Result
Visual Acuity Converter (Snellen / logMAR / Decimal) Visual Acuity Converter (Snellen / logMAR / Decimal) is a health and wellness calculator that helps you calculate a measurement from one unit to an equivalent in another unit. The formula used is: Decim — free online calculator.
Formula
- Visual Acuity Converter calculates its result from Snellen Denominator (20/__ ). It uses the formula Decimal = 20 ÷ denom; logMAR = log₁₀(denom ÷ 20); Metric = denom × 0.3. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Snellen Denominator. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Visual Acuity
- Snellen Denominator: 40 20/__
Using Snellen Denominator (20/__ ) = 40, the calculated result is 12.
Sample result: Calculating…
Frequently asked questions
What does the Visual Acuity calculate?
Visual Acuity Converter (Snellen / logMAR / Decimal) Visual Acuity Converter (Snellen / logMAR / Decimal) is a health and wellness calculator that helps you calculate a measurement from one unit to an equivalent in another unit. The formula used is: Decim — free online calculator.
Which values should I enter?
Enter Snellen Denominator using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Decimal = 20 ÷ denom; logMAR = log₁₀(denom ÷ 20); Metric = denom × 0.3.
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.