The use of SI is wide-spread and those who are unfamiliar with SI find themselves somewhat isolated in a growing global community. Today, I hope to provide some easy-to-remember tips to those individuals who are curious about SI, but are reluctant to adopt its use.
Conversationally, we often discuss the environment and our own comfort within it. As a result, common units of temperature are often cited and discussed. Rather than wrestle with a more accurate mental conversion or calculating one using a computer, try to remember the tips below; it might speed your conversational comprehension and free up your mind for the social aspect of agreeing that 30°C is rather warm.
QUICK TEMPERATURE CONVERSION
F minus 30, divided by 2 ≈ CPeople find themselves discussing distances internationally for a variety of reasons. Perhaps you or someone you know is in the US military and stationed abroad. Or maybe you have a friend interested in joining you on a 5 kilometer run, but they hesitate because they're only comfortable running 3 miles. I hope the quick methods below will help you or your friend adjust quickly to the measurement most familiar.
C multiplied by 2, add 30 ≈ F
QUICK DISTANCE OR SPEED CONVERSION
mi divided by 5, multiplied by 8 ≈ kmANOTHER (LESS ACCURATE) DISTANCE OR SPEED CONVERSION
km divided by 8, multiplied by 5 ≈ mi
mi divided by 3, multiplied by 5 ≈ kmTechnology has allowed our ever-growing population to become evermore connected. Borders and boundaries begin to fade in meaning as we correspond and collaborate with people instantaneously, regardless of our location or theirs in world. In a world of dizzying communication, using the same measurement "language" is the difference between clarity and confusion.
km divided by 5, multiplied by 3 ≈ mi
(This second set of distance conversions might be noticeably less accurate for numbers higher than 10)