We all had to learn it in the UK ... and we had to learn it long before the internet.... it's not as hard as you think. It's much easier to convert in 10's than it is in 12's..
However I still convert temperature from celcius to Fahrenheit in my head..
When our currency went metric, there was something of a turmoil depending on which generation you were. To save anyone looking it up, prior to February 1971, the UK had the pounds, shillings and pence. (£:s:d). One pound was made up of 240 pence, with 12 pence to the shilling and 20 shillings to the pound. And just to confuse you further, we had the Guinea, a term still used in certain circles such as horse racing to describe values equivalent to one pound and one shilling.
All that changed on February 15th 1971 when our currency went simply pounds and pence. One hundred pennies to the pound.
We love doing things by halves here in the UK. When Britain announced its intention to adopt the metric system in 1965, it was originally planned that road conversion would take place in 1973. However, following the change of government in 1970, the conversion programme was put on indefinite hold and has never been re-instated. Our road signs show distances in miles.
Imperial units, units of measurement of the British Imperial System, the traditional system of weights and measures used officially in Great Britain from 1824 until the adoption of the metric system beginning in 1965. The
United States Customary System of weights and measures is
derived from the British Imperial System.
You can go metric, but in my will I have requested burial, six feet under, but if they do cremate me, just make sure the dial is on Fahrenheit.