Multimeter Accuracy Calculator

Your meter says 12.65V. What could the real voltage be?

Meter specs look like "±(0.5% + 2)". The 2 means 2 counts of the last digit. Everything is worked out in your browser. Nothing is saved or sent anywhere.

1. Your reading

For 12.65 that's 0.01.

2. Meter spec

3. Results

How it was worked out

    What this does and doesn't tell you

    • Accuracy is usually worse on AC, on current ranges and at the bottom of a range.
    • A flat meter battery can give wrong readings.
    • 240V AC mains can kill. In Australia, work on household mains wiring must be carried out by a licensed electrician. Low-voltage DC systems can still deliver very high current.
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