Physics Measurements and Conversions

Temperature

• °C = 5/9 (°F - 32) (Celsius to Fahrenheit)
• °F = (9/5 °C) + 32 (Fahrenheit to Celsius)
• K = °C + 273.15 (Celsius to Kelvin)
• °C = K - 273.15 (Kelvin to Celsius)
• °F = (9/5 * (K - 273.15)) + 32 (Kelvin to Fahrenheit)

Energy

• 1 J = 1 kg⋅m²/s²
• 1 J = 0.23901 cal
• 1 cal = 4.186 J
• 1 eV = 1.602 × 10⁻¹⁹ J
• 1 kWh = 3.60 × 10⁶ J

Pressure

• 1 Pa = 1 N/m²
• 1 Pa = 1 kg/m⋅s²
• 1 atm = 101,325 Pa
• 1 atm = 1.013 × 10⁵ Pa
• 1 bar = 10⁵ Pa
• 1 torr = 1 mmHg
• 1 mmHg = 133 N/m²
• 1 lb/in² = 6895 Pa
• 1 lb/ft² = 47.88 Pa

Time

• 1 min = 60 sec
• 1 hr = 60 min
• 1 hr = 3600 sec
• 1 day = 86,400 sec
• 1 week = 7 days
• 1 year = 365.25 days
• 1 decade = 10 years
• 1 century = 100 years

Power

• 1 W = 1 J/s
• 1 hp = 746 W
• 1 hp = 550 ft⋅lb/s
• 1 Btu/h = 0.293 W

Force

• 1 N = 10⁵ dyne
• 1 N = 0.2248 lb
• 1 lb = 4.448 N
• 1 lb = 4.448 × 10⁵ dyne

Angle

• 1 rad = 57.30°
• 1° = 0.01745 rad
• 1 revolution = 360°
• 1 revolution = 2π rad
• 1 rev/min (rpm) = 0.1047 rad/s

Speed

• 1 m/s = 3.281 ft/s
• 1 ft/s = 0.3048 m/s
• 1 mi/min = 88 ft/s
• 1 km/h = 0.2778 m/s
• 1 mi/h = 1.467 ft/s

Acceleration

• 1 m/s² = 100 cm/s²
• 1 m/s² = 3.281 ft/s²
• 1 cm/s²= 0.01 m/s²
• 1 cm/s²= 0.03281 ft/s²
• 1 ft/s² = 0.3048 m/s²
• 1 ft/s² = 30.48 cm/s²
• 1 mi/hr²= 1.467 ft/s²