Sometimes other people asked me what is the conversion from this unit to this unit, say meters to inches . And then I started to count in my head or think of some clue…ohh, gushhh…I forgot and simply said to check it later on. So, I’m doing myself a favor by complying this basic fundamental conversion factors, which is between Imperial and SI units. That is when I realized the important of this knowledge as it is very useful for many application later on…
It is a good practice to comply everything into forms of table for reference. We oath to think to much inside our mind and will definitely forget it as we thought it is not too important to remember or the units is already given as reference in some cases. Some country still using Imperial units like the United States (i.e. foot) and mostly using the SI units especially for engineering purposes.
| Parameters |
Imperial to SI |
SI to Imperial |
||
| Length | 0.3048 25.4 |
m mm |
3.281 0.03937 |
ft (foot) in (inch) |
| Area | 0.09290 645.2 |
m2 mm2 |
10.76 0.001550 |
square foot square inch |
| Volume | 0.02832 4.546 3.785 28.32 16.39 16387 |
m3 litre litre litre ml mm3 |
35.31 0.2200 0.2642 0.03531 0.06102 |
cubit foot gallon (UK) gallon (US) cubit foot cubit inch cubit inch |
| Mass | 1.016 0.4536 453.6 28.35 |
Mg or tonne kg g g |
0.9842 2.205 0.3527 |
ton lb (pound) lb (pound) oz (ounce) |
| Density | 0.01602 | Mg/m3 or g/cm3 | 62.43 | pound/cubic foot |
| Force | 9.964 4.448 |
kN N |
0.1004 0.2248 |
ton force pound force |
| Pressure | 0.04788 6.895 47.88 |
kN/m2 or kPa kN/m2 kN/m2 or Pa |
20.89 0.1450 0.02089 |
lb f/sq ft lb f/sq in lb f/sq ft |
CCS: Table 1
Examples of conversion:
Taking the 1st row, the Length parameter
- Converting Imperial to SI unit; 1 ft / 3.281 = 0.3048 m
- Converting SI to Imperial unit; 1 m / 0.3048 = 3.281 ft
How about converting in to m; we knew that 1 ft = 12 in = 0.3048 m
So, 1 in = (1 x 0.3048) / 12 = 0.0254 m
Taking the 2nd row, the Area parameter
- Converting Imperial to SI unit; 1 sq. ft / 10.76 = 0.09290 m2
- Converting SI to Imperial unit; 1 m2 / 0.09290 = 10.76 sq. ft
How about converting sq.in to m2; we knew that 1 sq.ft = (12 x 12) sq.in = 0.09290 m2
So, 1 sq.in = (1 x 0.09290) / (12 x 12) = 0.0006451 m2
The conversion units shown in CCS: Table 1 above would be our general guideline or reference whereas we still need to calculate further such as in the conversion examples. With that in mind, I hope this will help (me personally) and may develop your skill in converting units effectively and accurately…
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Author: Civil-Guy | Blog: Civil Craft Structures | Subscribe: RSS or Email
