LogMAR values to Decimal acuity values Converter
Convert logMAR values to decimal acuity values using decimal acuity = 10^-logMAR. The formula is decimal acuity = 10^-logMAR; 1 logMAR is 0.1 decimal.
The base-10 logarithm of MAR, often used in vision research and chart scoring.
A visual acuity notation equal to the Snellen numerator divided by the denominator.
Start with your value in logMAR values, then apply the formula below. It stays visible so you can catch rounding mistakes instead of just copying the output.
Use these values for notation comparison and documentation checks only. They do not diagnose vision problems or replace an eye exam.
Visual acuity notation is often rounded to chart lines, so the converted numeric value may be more precise than the original measurement. This page displays converted values with up to 3 decimal places by default.
| LogMAR values | Decimal acuity values |
|---|---|
| -0.3 logMAR | 1.995 decimal |
| -0.1 logMAR | 1.259 decimal |
| 0 logMAR | 1 decimal |
| 0.3 logMAR | 0.501 decimal |
| 0.6 logMAR | 0.251 decimal |
| 1 logMAR | 0.1 decimal |
Useful for comparing eye chart notation systems. Use the same formula with your exact input if the measurement needs to be documented.
Useful for translating research tables and clinical references. Use the same formula with your exact input if the measurement needs to be documented.
Useful for checking educational vision examples. Use the same formula with your exact input if the measurement needs to be documented.
How do I convert logMAR values to decimal acuity values?
Enter the value in logMAR values and apply decimal acuity = 10^-logMAR. Round the decimal acuity values result after the conversion, not before.
What is 1 logMAR value in decimal acuity values?
1 logMAR equals 0.1 decimal with the current rounding setting. Keep more decimal places when the result feeds another calculation.
What is -0.3 logMAR in decimal?
-0.3 logMAR is 1.995 decimal. It appears in the lookup table so you can compare it with nearby amounts.
Can I convert decimal acuity values back to logMAR values?
Yes. Use the reverse Decimal acuity values to LogMAR values converter if you need to go the other direction.
How accurate is this logMAR values to decimal acuity values conversion?
The calculator runs the formula in your browser and rounds results to 3 decimal places by default. Visual acuity notation is often rounded to chart lines, so the converted numeric value may be more precise than the original measurement.