weight:

• 1 ounce ≈ 28 g
• 1 pound (lbs) (16 ounces) ≈ 450 g
• 1 stone (14 pounds) ≈ 6.4 kg

volume:

• 1 pint ≈ 570 ml
• 1 gallon (8 pints) ≈ 4.5 liters

temperature:

• equal at –40°
• 32 °F = 0° C
• 77 °F = 25 °C
• 100 °F ≈ 38 °C
• 212 °F = 100 °C

distance:

• 1 inch ≈ 2.5 cm
• 1 foot (12 inches) ≈ 30 cm
• 1 yard ≈ 0.9 m
• 1 mile ≈ 1600 meters = 1.6 km

nautical:

• 1 knot ≈ 1.8 km/h
• 1 fathom ≈ 1.8 m
• 1 shackle (15 fathoms) ≈ 27 m
• 1 cable length (100 fathoms) ≈ 180 m
• 1 nautical mile (1.1 mile) ≈ 1.8 km
• 1 league (3 nautical miles) ≈ 4.8 km