What are imperial and metric systems of measurement tolerances and fixed reference points?

Here is a conversion table:

METRIC

IMPERIAL

1 millimetre (mm)

0.03937 in

1 centimetre (cm) 10mm

0.03937 in

1 mere (m) 100cm

1.0936 yd

1 kilometre 1000 m

0.6214 mile

IMPERIAL

METRIC

1 inch (in)

2.54 cm

1 foot (Ft) - 12 inches

0.3048 m

1 yard (yd) - 3 feet

0.9144 m

1 mile - 1760 yd

1.6093 km

1 int nautical mile - 2025.4

1.853 km