Tenths to inches
by kbell on 08/05/05 at 15:53:21

I need to find a way to convert tenths to inches.  I use a laser survey instrument at work; this unit provides distances in feet and tenths (i.e. 432.4 feet).  I'm trying to figure out what place on the ruler in inches 4 tenths is, as well as 1 through 10.

Thanks,

Keith

Re: Tenths to inches
by XLXRider on 10/08/05 at 17:53:37

I dunno if this will help or not...
325.4 feet = 325 feet, 4.8 inches.  Just multiply the number of inches in a foot (12) times the decimal point, in this case 0.4.
That is, 0.1 feet = 1.2 inches, 0.2 feet =2.4 inches, 0.3 feet = 3.6 inches, and so on.  On a standard US ruler, I'd say you'll have to interpolate a bit.  1.2 inches is almost 1-1/4, 3.6 inches is 3-3/5 (or 3-9/15) so interpolate it as 3-9/16.
That's what I'd do, anyhow... depends, I guess, upon the degree of accuracy you require.
Good luck with it, hope this helps.
Regards,
XLXRider

Re: Tenths to inches
by kbell on 10/08/05 at 23:21:35

I appreciate your information.  Help me understand how 3.6 inches is the same as 3 3/5; I understand the 1.2 inches as 1 1/4.

Thanks,

Keith

Re: Tenths to inches
by Robert Fogt on 10/08/05 at 23:55:15

I have something in Microsoft Excel I could send you. I will eventually have something up on the site, just nothing yet. Converting from decimal to fractions with JavaScript means just looking up the values on a chart, not as easy as with Excel.

0.6 is 6/10, which factors down to 3/5

The number of times you have to move the decimal to the right, is how many zeros on the bottom of the fraction.

For example
0.1 = 1/10
0.11 = 11/100
0.111 = 111/1000
etc.

Re: Tenths to inches
by Charlie B on 10/25/05 at 14:12:16

432.4 feet = 432 feet 5 inches
432.40 feet = 432 feet 4 3/4 inches

1 inch = .08, 2 inches = .17, 3 inches .25, 4 inches=  .33,
5 inches = .42, 6 inches .50, 7 inches = .58, 8 inches = .67, 9 inches = .75, 10 inches = .83, 11 inches = .92.

1/8" has 96 parts to the foot, the survey foot has 100 parts.

For Rounding
Tenths equivalent to Inches
Hundredths = 1/8 of an Inch.

The equipment has measured the distance to the nearest tenth of a foot (Example). This makes the measurment Plus/Minus .05' and/or 5/8" approximate, depending on the capability of the equipment.

Re: Tenths to inches
by 1110d on 10/26/05 at 09:24:08

12"/10=1.2"

so...

4/10 = 4.8" or 4-13/16" (actually a hair less)

Re: Tenths to inches
by NapaSurveyor on 10/26/05 at 14:57:44

The survey equipment (first post) above measured a distance of 432.4', nearest tenth of a foot. That means the distance falls between 432.35 & 432.44. If I stated the distance was 432 feet 4-13/16 inches I'm implying that the distance was measured to the nearest .005', which is not the case. The 4-13/16" would need a qualifier of plus/minus 1/2" to be closer to the truth.

Re: Tenths to inches
by Brandon on 10/27/05 at 20:40:21

wouldnt 4 tenths be an 1''5/16

Re: Tenths to inches
by 1110d on 10/28/05 at 09:43:53

[quote author=NapaSurveyor link=board=general;num=1123271601;start=0#6 date=10/26/05 at 14:57:44]The survey equipment (first post) above measured a distance of 432.4', nearest tenth of a foot. That means the distance falls between 432.35 & 432.44. If I stated the distance was 432 feet 4-13/16 inches I'm implying that the distance was measured to the nearest .005', which is not the case. The 4-13/16" would need a qualifier of plus/minus 1/2" to be closer to the truth. [/quote]


You are absolutly correct.  It's strange how the math will sometimes give you an erronous accuracy which is greater than the original value.

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