How do u convert between the metric system and the english system

Question

• Converting 4.92in to mm

Answer 1

1 inch = 25.4 millimeter

4.92 inches = 25.4 * 4.92 millimeter = 124.968 millimeter

Thus 4.92 in = 124.968 mm

Answer 2

Let me add that conversion tables should be in your textbook.

Answer 3

For quick conversions you can use google or some other unit converter. Otherwise, if you need to show work or if you need practice, use dimensional analysis. In other words, multiply your number 4.92 inches times the converting factors needed. You can go step by step, converting from inches to centimeters and then centimeters to millimeters. 

 

the converting factors are as follows:

 

    1 inch = 2.54 cm,   or      2.54 cm/1 inch = 1,       or  1 inch/2.54 cm = 1

    1 cm = 100 mm, or          1 cm/100mm = 1,         or  100mm/1cm = 1


you can use conversion factors to convert either way. 

Line up your numbers and units in your dimensional analysis to make sure you dont mix up the units.

 

 

ie:

 

         4.92 inches  x   2.54 cm  =  12.496 cm     x  100 mm  =   1249.6 mm  = 1250 mm 

                                  1 inch                                  1 cm                         

 

 

note that I bolded the significant figures. Remember, conversion factors are exact; in this case, you start off with three sig figs so your final converted units should also be 3 sig figs. You should round your answer only at the end of you calculations to prevent error propagation.  

 

Answer 4

Metric to English

 

Metric                                English
Centimeters (cm) x .39 =  inches

 

Meters (m) x 3.3 =            feet

 

Meters (m) x 1.1 =           yards  

 

Kilometers (km) x .6 =     miles

 

Sq. centimeters (cm2) x .2 = square inches

 

Square meters (m2) x 10.8 = square feet

 

Square meters (m2) x 1.2 = square yards

 

Hectares (ha) x 2.5 =       acres

 

Cubic meters (m3) x 35.3 = cubic feet

 

Liters (l) x 1.1 =             quarts (lq)

 

Cubic meters (m3) x 284.2 = gallons

 

Grams (g) x .04 =           ounces (avdp)

 

Kilograms (kg) x 2.2 =   pounds (avdp)

 

Kilowatts (kW) x 1.3 =  horsepower

Answer 5

You start with what ever you know.5.00 meters 

 

5.00 m x ______in    the equivalent for m to inches is 0.0254 m = 1.in

                    m

 

5.00 m x  1in/ 0.0254 m  =197. inches

 

this is equivalent to 2.54 cm = 1 in

or 1 m = 39.37 in

remember if you keep significant digits the same as the measured number.

The number you start with units will match the denominator units; and the equivalent units in the numerator or on top. 

1 L = 1.057 qt= 1000 cubic cm

Answer 6

The easiest conversion to remember in this case is 2.54 cm = 1 in

When converting units make sure that the units cancel

4.92in x (2.54cm/1in) x (10mm/1cm) = 124.968mm

inches cancel and cm cancel

 

Answer 7

Hi Angela;

This is the easiest technique I know of...

Please memorize...

1 inch = 2.54 centimeters or 25.4 mm

So...

25.4 mm/1 inch = ? mm/4.92 inches

Multiply both sides by 4.92 inches...

(4.92 inches) (25.4 mm/1 inch)=(4.92 inches)(? mm/4.92 inches)

Cancel out words...

(4.92 inches) (25.4 mm/1 inch)=(4.92 inches)(? mm/4.92 inches)

Proceed to cancel out words...

(4.92) (25.4 mm/1)=(4.92 inches)(? mm/4.92 inches)

Cancel out numbers...

(4.92) (25.4 mm/1)=(4.92)(? mm/4.92)

(4.92)(25.4 mm)=? mm

=124.968 mm