Calibrate

Hold a standard bank or credit card against the dashed outline and drag the slider until they match exactly.

Place card here
85.6 × 53.98 mm
340 px
PPI: —
Measure
— PPI
Linear measurement
0.0 mm
← Drag or tap the ruler to set measurement
Radius / diameter gauge
r ø
25.0 mm radius
ø 50.0
Hold your object over the circle and match its edge
Bolt & nut identifier
8.0 mm
13.0 mm