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Metric / English Conversions
By Brad Smith
There are lots of websites available to do Metric / English conversions, but here are some quickie conversions and techniques to help.
TEMPERATURE: Given a temperature in Celsius, you can easily estimate the temperature in Farenheit by multiplying by 2 and adding 30. For example, if the temperature is 21°C, that means it's roughly 21*2+30 = 72°F. The real temperature is 70°F so the estimation is off by only 2°. Certainly close enough for government work. And, of course, converting from Farenheit to Celsius is the opposite: subtract 30, then divide by 2. For example, 75°F is approximately (75-30)/2 = 23°C. The real temperature is 24 °F, so this approximation is quite close.
MILEAGE: Fuel efficiency in continental Europe is measured in liters consumed per 100 km, which is the inverse of the U.S. standard miles per gallon. To convert from liters/100 km to miles/gal, divide 235 by the value. The same equation can be used to calculate miles/gal to liters/100 km as well. For example, if your European car gets 6.2 liters/100 km, that's 235/6.2 = 38 mpg. Another example: 22 mpg = 235/22 = 10.7 liters/100 km.
| 1 | mi | = | 1.61 | km | 1 | gal | = | 3.79 | l | 1 | oz | = | 2.96 | cl | °F | = (9/5) °C + 32 | mpg = | 235.2 / [l/100km] | ||||||||||
| 1 | km | = | 0.62 | mi | 1 | l | = | 0.26 | gal | 1 | cl | = | 0.34 | oz | °C | = (°F - 32) * (5/9) | [l/100km] = | 235.2 / mpg | ||||||||||
| 1 | in | = | 2.54 | cm | 1 | oz | = | 29.55 | ml | |||||||||||||||||||
| 1 | cm | = | 0.39 | in | 1 | ml | = | 0.034 | oz | |||||||||||||||||||
| Distance / Speed | Volume | Volume | Temperature | Fuel Efficiency | ||||||||||||||||||||||||
| miles | km | km | miles | gal | liters | liters | gal | oz | cl | cl | oz | F | C | C | F | mpg | l/100km | l/100km | mpg | |||||||||
| 1 | 1.6 | 1 | 0.6 | 1 | 3.8 | 1 | 0.26 | 1 | 3.0 | 1 | 0.34 | 0 | -18 | -20 | -4 | 16 | 14.7 | 5.0 | 46.9 | |||||||||
| 2 | 3.2 | 2 | 1.2 | 2 | 7.6 | 2 | 0.53 | 2 | 5.9 | 2 | 0.68 | 5 | -15 | -15 | 5 | 18 | 13.0 | 5.5 | 42.7 | |||||||||
| 3 | 4.8 | 3 | 1.9 | 3 | 11.4 | 3 | 0.79 | 3 | 8.9 | 3 | 1.02 | 10 | -12 | -10 | 14 | 20 | 11.7 | 6.0 | 39.1 | |||||||||
| 4 | 6.4 | 4 | 2.5 | 4 | 15.1 | 4 | 1.06 | 4 | 11.8 | 4 | 1.35 | 15 | -9 | -5 | 23 | 22 | 10.7 | 6.5 | 36.1 | |||||||||
| 5 | 8.0 | 5 | 3.1 | 5 | 18.9 | 5 | 1.32 | 5 | 14.8 | 5 | 1.69 | 20 | -7 | 0 | 32 | 24 | 9.8 | 7.0 | 33.5 | |||||||||
| 6 | 9.7 | 6 | 3.7 | 6 | 22.7 | 6 | 1.59 | 6 | 17.7 | 6 | 2.03 | 25 | -4 | 5 | 41 | 26 | 9.0 | 7.5 | 31.3 | |||||||||
| 7 | 11.3 | 7 | 4.3 | 7 | 26.5 | 7 | 1.85 | 7 | 20.7 | 7 | 2.37 | 30 | -1 | 10 | 50 | 28 | 8.4 | 8.0 | 29.3 | |||||||||
| 8 | 12.9 | 8 | 5.0 | 8 | 30.3 | 8 | 2.11 | 8 | 23.6 | 8 | 2.71 | 35 | 2 | 15 | 59 | 30 | 7.8 | 8.5 | 27.6 | |||||||||
| 9 | 14.5 | 9 | 5.6 | 9 | 34.1 | 9 | 2.38 | 9 | 26.6 | 9 | 3.05 | 40 | 4 | 20 | 68 | 32 | 7.3 | 9.0 | 26.1 | |||||||||
| 10 | 16.1 | 10 | 6.2 | 10 | 37.9 | 10 | 2.64 | 10 | 29.6 | 10 | 3.38 | 45 | 7 | 25 | 77 | 34 | 6.9 | 9.5 | 24.7 | |||||||||
| 15 | 24.1 | 15 | 9.3 | 15 | 56.8 | 15 | 3.96 | 15 | 44.3 | 15 | 5.08 | 50 | 10 | 30 | 86 | 36 | 6.5 | 10.0 | 23.5 | |||||||||
| 20 | 32.2 | 20 | 12.4 | 20 | 75.7 | 20 | 5.28 | 20 | 59.1 | 20 | 6.77 | 55 | 13 | 35 | 95 | 38 | 6.2 | 10.5 | 22.4 | |||||||||
| 25 | 40.2 | 25 | 15.5 | 25 | 94.6 | 25 | 6.61 | 25 | 73.9 | 25 | 8.46 | 60 | 16 | 40 | 104 | 40 | 5.9 | 11.0 | 21.3 | |||||||||
| 50 | 80.5 | 50 | 31.0 | 50 | 189.3 | 50 | 13.21 | 50 | 147.8 | 50 | 16.92 | 65 | 18 | 45 | 113 | 42 | 5.6 | 11.5 | 20.4 | |||||||||
| 60 | 96.5 | 60 | 37.2 | 60 | 227.1 | 60 | 15.85 | 60 | 177.3 | 60 | 20.30 | 70 | 21 | 12.0 | 19.6 | |||||||||||||
| 70 | 112.6 | 70 | 43.4 | 70 | 265.0 | 70 | 18.49 | 70 | 206.9 | 70 | 23.69 | 75 | 24 | 12.5 | 18.8 | |||||||||||||
| 80 | 128.7 | 80 | 49.6 | 80 | 302.8 | 80 | 21.14 | 80 | 236.4 | 80 | 27.07 | 80 | 27 | |||||||||||||||
| 90 | 144.8 | 90 | 55.8 | 90 | 340.7 | 90 | 23.78 | 90 | 266.0 | 90 | 30.46 | 85 | 29 | |||||||||||||||
| 100 | 160.9 | 100 | 62.0 | 100 | 378.5 | 100 | 26.42 | 100 | 295.5 | 100 | 33.84 | 90 | 32 | |||||||||||||||
| 110 | 177.0 | 110 | 68.2 | 110 | 416.4 | 110 | 29.06 | 110 | 325.1 | 110 | 37.23 | 95 | 35 | |||||||||||||||
| 120 | 193.1 | 120 | 74.4 | 120 | 454.2 | 120 | 31.70 | 120 | 354.6 | 120 | 40.61 | 100 | 38 | |||||||||||||||
| 130 | 209.2 | 130 | 80.6 | 130 | 492.1 | 130 | 34.35 | 130 | 384.2 | 130 | 43.99 | 105 | 41 | |||||||||||||||
| 140 | 225.3 | 140 | 86.8 | 140 | 529.9 | 140 | 36.99 | 140 | 413.7 | 140 | 47.38 | 110 | 43 | |||||||||||||||
| 150 | 241.4 | 150 | 93.0 | 150 | 567.8 | 150 | 39.63 | 150 | 443.3 | 150 | 50.76 | 115 | 46 | |||||||||||||||
| TEMPERATURE: The estimated Farenheit temperature is fairly accurate for the region of interest, 0-30°C, but gets more inaccurate at higher temperatures because the slopes are slightly different (9/5=1.8 for reality vs. 2 in our estimation). The temperature at which it is correct is 50 °F / 30 °C. For hot days, you can add 28 instead of 30 to get closer to reality. |
Related Link:
Metric Conversion System + Table / Chart Conversions + Converter
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