| To convert temperature | Into | Multiply by | 
| °F | °C | 0.556°C -17.8 | 
| °F | °F | 1.8°C +32 | 
| °C | °K | 1.0°C +273 | 
| Lenght |  |  | 
| mils | microns | 25.4 | 
| mils | millimeters | 0.0254 | 
| inches | mils | 1000 | 
| inches | centimeters | 2.54 | 
| feet | meters | 0.3048 | 
| miles | feet | 5280 | 
| yards | feet | 3 | 
| Mass |  |  | 
| ounces | grams | 28.4 | 
| pounds | kilograms | 0.45 | 
| grams | ounces (troy) | 0.03215 | 
| tons | pounds | 2000 | 
| Area |  |  | 
| square inches | square centimeters | 6.5 | 
| square feet | square meters | 0.09 | 
| square yards | square meters | 0.8 | 
| square miles | square kilometers | 2.6 | 
| acres | hectares | 0.4 | 
| Volume |  |  | 
| teaspoons | millimeters | 5 | 
| tablespoons | millimeters | 15 | 
| fluid ounces | millimeters | 30 | 
| quarts | liters | 0.95 | 
| gallons | liters | 3.8 | 
| cubic feet | cubic meters | 0.03 | 
| cubic yards | cubic meters | 0.76 | 
| Universal Gas Constant | R=0.0821 (Atm) (I)/(°K) (mole) |  | 
| Acceleration Due to Gravity | g=32.17ft/sec² 9.8m/sec² |  | 
| Avogrado’s Constant | N=6.023×10²³molecules/mole |  | 
| Speed of Light | c=186,000 miles/sec, 3×10¹° cm/sec |  | 
| Heat of Fusion (water 1atm, 0°C) | Hf=79.7 cal/g |  | 
| Heat of Vaporization (water 1atm, 100°C) | Hv=540 cal/g |  | 
| Volume of Perfect Gas | 22.4l at 0°C, 760 torr |  | 
| Faraday’s Constant | F=96.494 coulombs/equiv.weight |  | 
| Planck’s Constant | h=6.626×10 (-27) erg/sec |  | 
| Bragg’s Law | n=2d sin |  | 
| Absolute Zero | -273.15°C |  | 
| Temperature of Liquid Nitrogen | -195.8°C |  |