Travel

All about travel, with a focus on food.

Easy Centigrade-Fahrenheit and Kilos-Pounds Conversions

Traveling between cities in the US and other countries requires conversions between Centigrade and Fahrenheit, as well as between Kilos and Pounds. Here's a easy way to do the calculations, inspired by the faint childhood memories of the Trachtenberg method of arithmetic manipulations, and achieving error rates of 1% or less.

Converting Centigrade to Fahrenheit
DSA: DOUBLE, SUBTRACT one-tenth, ADD 32
Converting Fahrenheit to Centigrade
SHA: SUBTRACT 32, HALVE, ADD one-tenth
The exact formula: °F = °C * 9/5 + 32
The easy formula is the same.

Easy conversion using D-S-A (or DSA32) steps, with example converting 14 °C:
1. Double: 28
2. Subtract one-tenth: 28/10 = 2.8, rounded to 3, gives 28 - 3 = 25
Ignore negative sign if any, to make it easier, and then put sign back again.
3. Add 32: 25 + 32 = 57 °F [exact value is 57.2 °F]

The exact formula: °C = (°F - 32) * 5/9
The easy but approximate formula: °C = (°F - 32) * 1/2 * 1.1

Easy conversion, using S-H-A (or 32SHA) steps, with example converting 57 °C:
1. Subtract 32: 25
2. Halve: 12.5
3. Add one-tenth: 1.25, rounded to 1.3, gives 12.5 + 1.3 = 13.8 °C [exact value is 13.888... °C]

If no rounding is done, these steps provide the precise Fahrenheit value, with no error. This calculation leaves an error of around 1%; adding 1% to final result will give a more precise value in Centigrade.
The exact error is (5/9 - 1.1/2) / (1.1/2) = 1.0101...%, but 99% accuracy should be good enough for most day-to-day purposes.
Calculator:  °C      °F (Exact & Easy)
  [Calculators Rounded to 1 Decimal Digit]
Calculator:  °F       °C (Exact)      °C (Easy)
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Travel

In this section, it's all about memorable places I have visited, and like to visit again and again. And the focus is on food - where to get some good, local eats while traveling.

I thoroughly enjoy visiting cities, exploring all the streets and suburbs of a city, taking things very slow and just wasting time sitting on a city bench or a sidewalk cafe, spending all the time watching the local people go about with their daily duties. Then there is food - absolutely the best part of traveling is exploring restaurants of all types, and what draws me back to a place is usually the memory of particular foods - for example, Schwartz's in Montreal, Sal and Carmine's pizza in NYC, and the Taquerias in Mexico City. The food has to be unique and interesting, and the locals must also give it their vote of confidence. This means ignoring all the four/five star high-end tourist dining joints. These are actually risky since either bad food or bad service makes it all doubly disappointing, and secondly, all high-end places all over the world are alike. Why travel for those, travel should be for exploring and experiencing how others live and eat, in their daily routines.

I never make any definite plans about what I'll do when I get to a place - other than walk and eat, a strategy that works only in the truly memorable cities of the world.

Right now, I have two very favorite destinations -- Montreal, and any Latin America city. Montreal is just a six hour drive from Boston, so a a four-five day vacation is a sufficient excuse for me to try get to Montreal. And my fascination with Latin America and its people have given me my most important hobby -- I am trying to learn Spanish (sad to say, I have made little progress on that count even after multiple years of attending non-credit courses at the local school -- but that is ok, this is turning out to be a lifelong quest :-).

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