Centigrade is defined as a scale from 0° where water freezes to 100° where it boils, under standard atmospheric pressure. Fahrenheit defines these temperatures as 32° and 212°. Why Gabriel Fahrenheit chose these numbers, I don't think anybody knows and he is dead. 212-32=180 thus: One degree Centigrade is equivalent to 1.8 degrees Fahrenheit. Hence, we get the formula: F=1.8*C + 32
A Standard Atmosphere is defined as the pressure equivalent to that exerted by a 760mm column of Mercury at 0°C at sea level at Standard Gravity.
Metric is the world standard and today most American units are defined in terms of the Metric. The inch is defined as 2.54 centimeters, or 25.4 milimeters.
| -40 to Zero
C° to F° |
Zero to 66
C° to F° |
67 to 133
C° to F° |
134 to 200
C° to F° |
| -40 -40.0
-39 -38.2 -38 -36.4 -37 -34.6 -36 -32.8 -35 -31.0 -34 -29.2 -33 -27.4 -32 -25.6 -31 -23.8 -30 -22.0 -29 -20.2 -28 -18.4 -27 -16.6 -26 -14.8 -25 -13.0 -24 -11.2 -23 -9.4 -22 -7.6 -21 -5.8 -20 -4.0 -19 -2.2 -18 -0.4 -17 1.4 -16 3.2 -15 5.0 -14 6.8 -13 8.6 -12 10.4 -11 12.2 -10 14.0 -9 15.8 -8 17.6 -7 19.4 -6 21.2 -5 23.0 -4 24.8 -3 26.6 -2 28.4 -1 30.2 -0 32.0 |
0 32.0
1 33.8 2 35.6 3 37.4 4 39.2 5 41.0 6 42.8 7 44.6 8 46.4 9 48.2 10 50.0 11 51.8 12 53.6 13 55.4 14 57.2 15 59.0 16 60.8 17 62.6 18 64.4 19 66.2 20 68.0 21 69.8 22 71.6 23 73.4 24 75.2 25 77.0 26 78.8 27 80.6 28 82.4 29 84.2 30 86.0 31 87.8 32 89.6 33 91.4 34 93.2 35 95.0 36 96.8 37 98.6 38 100.4 39 102.2 40 104.0 41 105.8 42 107.6 43 109.4 44 111.2 45 113.0 46 114.8 47 116.6 48 118.4 49 120.2 50 122.0 51 123.8 52 125.6 53 127.4 54 129.2 55 131.0 56 132.8 57 134.6 58 136.4 59 138.2 60 140.0 61 141.8 62 143.6 63 145.4 64 147.2 65 149.0 66 150.8 |
67 152.6
68 154.4 69 156.2 70 158.0 71 159.8 72 161.6 73 163.4 74 165.2 75 167.0 76 168.8 77 170.6 78 172.4 79 174.2 80 176.0 81 177.8 82 179.6 83 181.4 84 183.2 85 185.0 86 186.8 87 188.6 88 190.4 89 192.2 90 194.0 91 195.8 92 197.6 93 199.4 94 201.2 95 203.0 96 204.8 97 206.6 98 208.4 99 210.2 100 212.0 101 213.8 102 215.6 103 217.4 104 219.2 105 221.0 106 222.8 107 224.6 108 226.4 109 228.2 110 230.0 111 231.8 112 233.6 113 235.4 114 237.2 115 239.0 116 240.8 117 242.6 118 244.4 119 246.2 120 248.0 121 249.8 122 251.6 123 253.4 124 255.2 125 257.0 126 258.8 127 260.6 128 262.4 129 264.2 130 266.0 131 267.8 132 269.6 133 271.4 |
134 273.2
135 275.0 136 276.8 137 278.6 138 280.4 139 282.2 140 284.0 141 285.8 142 287.6 143 289.4 144 291.2 145 293.0 146 294.8 147 296.6 148 298.4 149 300.2 150 302.0 151 303.8 152 305.6 153 307.4 154 309.2 155 311.0 156 312.8 157 314.6 158 316.4 159 318.2 160 320.0 161 321.8 162 323.6 163 325.4 164 327.2 165 329.0 166 330.8 167 332.6 168 334.4 169 336.2 170 338.0 171 339.8 172 341.6 173 343.4 174 345.2 175 347.0 176 348.8 177 350.6 178 352.4 179 354.2 180 356.0 181 357.8 182 359.6 183 361.4 184 363.2 185 365.0 186 366.8 187 368.6 188 370.4 189 372.2 190 374.0 191 375.8 192 377.6 193 379.4 194 381.2 195 383.0 196 384.8 197 386.6 198 388.4 199 390.2 200 392.0 |
The table is exact. There has been no rounding. I created it by successively adding 1.8 to 32 two hundred times.
It has every degree C from minus 40 up to about the high we use in our home ovens, deep frying or making Candy.
Any Centigrade temperature when converted to Fahrenheit, if the result is positive, will be a number that: When you add the digits together you will get 5. If you get a number larger than 5 add those digits together and you will get 5. This is true even for temperatures over 1000°C which is 1832°F and is about what we call "Red Hot".
For the curious: When temperatures converted to Fahrenheit are negative, their digits will add to four. That is the reason for the break between -18°C and -17°F
I like the Centigrade scale because: For human comfort, 20°C is a little cool, and 30°:C is starting to get too warm. Roughly: Any temperature in the 20's is nice. Outside that you are uncomfortable, and have to "do something" about the temperature. Lastly, zero is a serious temperature, and at negative temperatures one better start worrying about things freezing.
The entire world, except for the USA, and even there Doctors and Scientists use Centigrade. Human body temperature is defined as 37°C 98.6F is a conversion.
Anderus Celsius a Swedish astronomer who lived from 1701 to 1744; gave it the name Centigrade. I use the name Centigrade, because it has meaning. In 1948 a committee decided to rename Centigrade to Celsius after the founder.
In 1790 the meter was defined as one ten-millionth the distance from the equator to the north pole, passing through Paris. Today, we speak of the centimeter we don't call it an Eratosthene in honor of the discover. A Greek mathematician and astronomer in the third century B.C.; accurately estimated the circumference of the earth.
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