19.3 Relate Customary and Metric

Here are the estimates you need for relating customary and metric

1 in ≈ 2.5 cm

1 ft ≈ 30 cm

1 mi ≈ 1.6 km

1 m ≈ 39 in

1 kg ≈ 2.2 lb

1 oz ≈ 30 g

1 fl oz ≈ 30 ml

1 L ≈ 1 qt