Calculations

Round off

• 8 = 10
• 23 = 20
• 32 ft/sec² = 30
• Pi = 3

Conversions

• 1 atm = 14.7 (15) psi = 760 (750) mmHg
• 1 g = 32.2 (30) ft/sec² = 9.81 (10) m/s²
• 1 hp = 550 ft-lb/s = 746 (750) W
• 1 psi = 6894 Pa
• etc...