Common units and their conversions
20 cards · science · Reversible
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| Front | Back |
|---|---|
| 1 mile | 1.609 kilometers Roughly 1.6 km; a 5K race is about 3.1 miles. |
| 1 kilometer | 0.621 miles 10 km is about 6.2 miles (a 10K race). |
| 1 foot | 0.3048 meters Exact by definition; 3 ft ≈ 0.91 m. |
| 1 inch | 2.54 centimeters Exact by definition; 12 in = 1 ft. |
| 1 pound | 0.454 kilograms A 150 lb person weighs about 68 kg. |
| 1 kilogram | 2.205 pounds A liter of water has a mass of ~1 kg. |
| 1 ounce | 28.35 grams Weight ounce (avoirdupois); 16 oz = 1 lb. |
| 1 gallon | 3.785 liters US liquid gallon; the UK gallon is larger (4.546 L). |
| 1 liter | 33.8 fluid ounces About a quart plus a bit; common bottle is 500 mL (~17 fl oz). |
| 1 quart | 0.946 liters 4 cups = 1 quart; just under a liter. |
| 1 cup | 240 milliliters US measuring cup; many cooks round to 240 mL. |
| 1 fluid ounce | 29.57 milliliters 2 tbsp = 1 fl oz; often rounded to 30 mL. |
| 1 tablespoon | 15 milliliters Common kitchen/medicine rounding; US tbsp is ~14.8 mL. |
| 1 teaspoon | 5 milliliters 3 tsp = 1 tbsp; medicine doses often use 5 mL. |
| °C to °F | °F = (°C × 9/5) + 32 Multiply by 9, divide by 5, then add 32. |
| °F to °C | °C = (°F − 32) × 5/9 Subtract 32, then multiply by 5/9. |
| 0°C | 32°F Freezing point of water at standard pressure. |
| kilo- | 1,000× 1 km = 1,000 m; 1 kg = 1,000 g. |
| centi- | 1/100× 1 cm = 0.01 m; common for heights and small lengths. |
| milli- | 1/1,000× 1 mL = 0.001 L; 1 mm = 0.001 m. |