Useful cooking knowledge, °F to °C and such other useless information

I decided to do this page because of the number of times it is asked on websites, I realise that it shouldn’t as in most countries the metric system is in place and even those that hang on to bits of old Imperial systems, it is taught in schools (and has been since the 1960s). I was at the difficult period of transformation, being in Marine Engineering and changing from BTUs, WSTs, PSI, HPs , heat engines, Drafting and R&D was a mine field, don’t forget this was before the days of computers (well they had just become part of the machine tool technology in the form of CNC and the pay office with the punch card system). It was not until I started working for MAN that I was really confronted with mass IT in the form of medium speed diesel engine controllers (DDC relays).




But I shall start real slow and if there are any (and there always are) wiz kids out there, bear with the older amongst us that have never had a need to know that a lb is 452g and doesn’t even know that g is short for gramme.



I will start real slow with temperature, I will only deal with Centigrade or as it is now called Celsius and Fahrenheit



The formula for converting Fahrenheit to Celsius is :



°C = °F -32 x5/9



Worked example:



°C = 32-32 = 0



0 x5 = 0



0 /9 =0 =0 freezing point in Celsius





The formula for converting Celsius to Fahrenheit is:



°F = C x 9/5 + 32



Worked example:



°F = 100 x9 = 900



900/5 = 180



180 + 32 = 212 boiling point in Fahrenheit


Conversion table
                                                     °C    °F         °C   °F

0 -32          125 -257

5 -41          130 -266

10 -50        135 -275

15 -59        140 -284

20 -68        145 -293

25 -77        150 -302

30 -86          155 -311

35 -95          160 -320

40 -104        165 -329

45 -113        170 -338

50 -122        175 -347

55 -131        180 -356

60 -140        185 -365

65 -149        190 -374

70 -158       195 -383

75 -167       200 -392

80 -176       205 -401

85 -185        210 -410

90 -194        215 -419

95 -203        220 -428

100 -212       225 -437

105 -221       230 -446

110 -230       235 -455

115 -239       240 -464

120 -248      245 -473