1 km = 1000 m
1 m = 100 cm
1 cm = 10 mm
1 mi = 1.60934 km
1 ft = 30.48 cm
1 in = 2.54 cm
1 t = 1000 kg
1 kg = 1000 g
1 g = 1000 mg
1 lb = 453.592 g
1 oz = 28.3495 g
1 kg = 2.20462 lb
°F = °C × 9/5 + 32
°C = (°F - 32) × 5/9
K = °C + 273.15
°C = K - 273.15
水の凝固点: 0°C = 32°F
水の沸点: 100°C = 212°F