McHenry Sportsmen's Club - Engineering: Decifoot Conversion

McHenry Sportsmen's Club: Engineering

Decifoot Conversion Tables

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Decifoot Conversion:

Decifoot is a measurment which attempts to be as flexable as the metric system but uses the FOOT as its base unit.
A FOOT is used as a metric METER, it is divided using the decimal system.
You can relate to this by viewing the first division as a Decafoot (divides the foot into 10 equal parts).
The next division would be a centifoot (divides the foot into 100 equal parts).
After that, dividing a foot by the next power of 10 would give millifoot (divides a foot into 1000 equal parts).

The rub comes in converting from and to inches using this standard. There is no good way to do this.

Certain things to consider:

A decifoot is a little larger than 3 centimeters. For most applications a decifoot may be considered to be 3 centimeters.

There are 12 inches to a foot. This being true, a decifoot is 1.2 inches long.

Conversely, one inch equals .833333 Decifoot (repeating number).

Fractions of inches are normally stated by dividing the previous division by 2.

Consider: 1/1, 1/2, 1/4, 1/8. 1/16/ 1/32, 1/64. 1/128 amd 1/256

Because a decifoot is 1.2 inches long, the resolution is in fifths of an inch.

1/5 of one inch equals 12.8 / 64 (a little less than 13/64)

We will use 12.8 and apply standard rounding.

Table to convert Decifoot (1/10 of a foot) to inches:

Decifoot Inches (decimal) Inches (fraction)
1 1.2 1 1/5 1 13/64

2 2.4 2 2/5 2 26/64

3 3.6 3 3/5 3 39/64

4 4.8 4 4/5 4 51/64

5 6 6 6

6 7.2 7 1/5 7 13/64

7 8.4 8 2/5 8 26/64

8 9.6 9 3/5 9 39/64

9 10.8 10 4/5 10 51/64

10 12 12 12

Decifoot	Inches (decimal)	Inches (fraction)
1	1.2	1 1/5	1 13/64
2	2.4	2 2/5	2 26/64
3	3.6	3 3/5	3 39/64
4	4.8	4 4/5	4 51/64
5	6	6	6
6	7.2	7 1/5	7 13/64
7	8.4	8 2/5	8 26/64
8	9.6	9 3/5	9 39/64
9	10.8	10 4/5	10 51/64
10	12	12	12

Table to convert Decifoot fractions to inches:

Decifoot Inches (decimal) Inches (fraction)
1 1.2 1 12.8 / 64

1/2 .6 38.4 / 64

1/4 .3 19.2 / 64

1/8 .15 4.8 / 64

1/16 .075 2.4 / 64

1/32 .0375 1.2 / 64

1/64 .01875 .6 / 64

Decifoot	Inches (decimal)	Inches (fraction)
1	1.2	1 12.8 / 64
1/2	.6	38.4 / 64
1/4	.3	19.2 / 64
1/8	.15	4.8 / 64
1/16	.075	2.4 / 64
1/32	.0375	1.2 / 64
1/64	.01875	.6 / 64

Table to convert Inches (1/12 of a foot) to Decifoot:
(No fractions, Decifoot is a decimal system).

Inches Decifoot (decimal)
1 .8333
2 1.6666
3 2.4999
4 3.3333
5 4.1666
6 4.9999
7 5.8333
8 6.6666
9 7.4999
10 8.3333
11 9.1666
12 10

Inches	Decifoot (decimal)
1	.8333
2	1.6666
3	2.4999
4	3.3333
5	4.1666
6	4.9999
7	5.8333
8	6.6666
9	7.4999
10	8.3333
11	9.1666
12	10