# Is there a site to do conversions of measurements

Is there a site that teaches how to do conversions of measurments. More specificly I need one that teaches coversion between different measurements like gallons to cubic inches or square feet to millimeters or grams to meters LOL if there is such a thing lol

OlderDan
Homework Helper
I stongly believe that all conversions should be taught as multiplication of a given quantity by the identity, 1. There are countless ways to write 1 as the ratio of any two equals. For example to convert feet to inches

$$3 feet = 3 feet * \frac{12 inches}{1 foot} = 36 inches$$

This can be extended to changes of measuring systems

$$3 feet = 3 feet * \frac{12 inches}{1 foot} * \frac{2.54 cm}{1 inch} = 91.44 cm$$

All conversions can be done by multiplying by appropriate representations of 1. One should never have to think about when to divide and when to multiply. The units tell us which way to form the numerator and denominator of the fraction equal to 1.

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Cool I get how to go from say grams to kilograms Its just when it goes from one measurement like grams to say liters. They boggles the mind LOL.

Wow thats a nice site but it does not teach it. I would have to sneak that in and cheat on my math test LOL And I dont have time to memorize 800 conversions LOL

OlderDan
Homework Helper
I hate tables like the one posted. I would avoid any table that has no equal signs I want to see

2.54 cm = 1 inch
1 mile = 5280 feet
1 liter = 1000 cm^3

etc etc etc

OlderDan