Inches to centimetres
1 inch = 2.54 cm exactly. Multiply inches by 2.54. Common: 6 in = 15.24 cm, 12 in = 30.48 cm, 70 in (5 ft 10) = 177.8 cm.
1 inch = 2.54 cm exactly. Multiply inches by 2.54. Common: 6 in = 15.24 cm, 12 in = 30.48 cm, 70 in (5 ft 10) = 177.8 cm.
°F = (°C × 9/5) + 32. Key refs: 0°C = 32°F (freezing), 20°C = 68°F (room), 37°C = 98.6°F (body), 100°C = 212°F (boiling), 180°C = 356°F (oven).
1 kg = 2.20462 lbs. 1 stone = 6.35 kg. Common: 60 kg = 9 st 6 lb, 70 kg = 11 st 0 lb, 80 kg = 12 st 8 lb, 100 kg = 15 st 10 lb.
1 km = 0.621 miles. 1 mile = 1.609 km. Ireland motorway = 120 km/h = 74.6 mph. A marathon = 42.2 km = 26.2 miles.
Standard 23% (electronics, clothing). Reduced 13.5% (building, fuel). 9% (hotels, restaurants). 4.8% (agriculture). 0% (food, medicines).
Europe uses L/100km (lower = better). US uses MPG (higher = better). Formula: MPG = 235.215 ÷ L/100km. 7 L/100km = 33.6 MPG.
BMI = weight(kg) ÷ height(m)². Under 18.5 = underweight. 18.5–24.9 = healthy. 25–29.9 = overweight. 30+ = obese. BMI is a screening tool only.
1 byte = 8 bits. 1 KB = 1,024 bytes. 1 MB = 1,024 KB. 1 GB = 1,024 MB. Divide Mbps by 8 to get MB/s. 100 Mbps = 12.5 MB/s download speed.
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