Fraction to Decimal Conversion Chart


mike@af
04-16-2004, 05:21 PM
This is a fraction to decimal conversion chart for all of you that still use the American English Standard Units.

Fractions in RED = Decimal in BLUE

1/64 = .0156
1/32 = .0312
3/64 = .0468
1/16 = .0625
5/64 = .0781
3/32 = .0937
7/64 = .1093
1/8 = .125
9/64 = .1406
5/32 = .1562
11/64 = .1718
3/16 = .1875
13/64 = .2031
7/32 = .2187
15/64 = .2343
1/4 = .250
17/64 = .2656
9/32 = .2812
19/64 = .2968
5/16 = .3125
21/64 = .3281
11/32 = .3437
23/64 = .3593
3/8 = .375
25/64 = .3906
13/32 = .4062
27/64 = .4218
7/16 = .4375
29/64 = .4531
15/32 = .4687
31/64 = .4843
1/2 = .500
33/64 = .5156
17/32 = .5312
35/64 = .5468
9/16 = .5625
37/64 = .5781
19/32 = .5937
39/64 = .6093
5/8 = .625
41/64 = .6406
21/32 = .6562
43/64 = .6718
11/16 = .6875
45/64 = .7031
23/32 = .7187
47/64 = .7343
3/4 = .750
49/64 = .7656
25/32 = .7812
51/64 = .7968
13/16 = .8125
53/64 = .8281
27/32 = .8437
55/64 = .8593
7/8 = .875
57/64 = .8906
29/32 = .9062
59/64 = .9218
15/16 = .9375
61/64 = .9531
31/32 = .9687
63/64 = .9843
1 = 1.000

Hope this helps all of you. I will add to this later Im tired of typing and stuff, I will add a conversion to metric (mm).

Macdaddy4738
04-16-2004, 05:28 PM
you get that from drafting too? we had those up all over the place.

thanks for posting it though...its gonna help out alotta people!

mike@af
04-16-2004, 05:31 PM
you get that from drafting too? we had those up all over the place.

thanks for posting it though...its gonna help out alotta people!

Yup. But it didnt have all of them so I had to fill in the blanks.

Vric
04-16-2004, 05:43 PM
humm anyone with a calculator (btw windows I one) can calculate this.

I mean, nice effort, but what is the utility of this ?

mike@af
04-16-2004, 05:51 PM
humm anyone with a calculator (btw windows I one) can calculate this.

I mean, nice effort, but what is the utility of this ?

Its a good reference when converting decimals to fractions. Trust me. I have used these charts more than anyone can imagine for my scratchbuild hot rod.

For instance if you are building 13 inch rotors for a 1/5 scale model the decimal is 2.6" but the fraction is 1-39/64".

Rulers dont have decimals on them so its actually quite useful for converting decimals to fractions.

BugZilla
04-16-2004, 07:15 PM
humm anyone with a calculator (btw windows I one) can calculate this.

I mean, nice effort, but what is the utility of this ?


Um, tack it up on the wall and forget the calculator.

Thanks for the reference, it will definately come in handy.

mike@af
04-16-2004, 09:06 PM
Um, tack it up on the wall and forget the calculator.

Thanks for the reference, it will definately come in handy.

Glad to see someone appreciates it.:disappoin

freakray
04-16-2004, 10:40 PM
humm anyone with a calculator (btw windows I one) can calculate this.

I mean, nice effort, but what is the utility of this ?

You obviously don't understand.

I am an engineer and I have a similar chart alongside my PC at work, it's a lot quicker to glance at a chart than to sit and punch buttons everytime you need a conversion.

You've become very crititcal, why is that?

mike@af
04-16-2004, 10:55 PM
I am an engineer and I have a similar chart alongside my PC at work, it's a lot quicker to glance at a chart than to sit and punch buttons everytime you need a conversion.

Ill vouch for that. I too do engineering and drafting. I've these charts, and charts very similar to this all over the place. They are very useful. I also see a lot of them at a machine shop I work at over the summer, they have charts with conversions everywhere. It can save a lot of time.

PRIVATEER
04-17-2004, 01:59 AM
I appreciate it too.

chrismcgee
04-17-2004, 02:51 AM
i feel lucky as i was born at a time where the old imperial system was phased out for the metric system. So i never ever learnt the "old" ways.
I find that my degree of accuracy with the mm system to be much more favourable when working on scale models.
1" = 25.4mm

so to get a 13" rotor multiply it by 25.4 then divide by 24 to get the scale for the cars to the nearest 0.1 of a mm! much more accurate than those 37/3 and a 1/5 etc.

plus the japanese use it so again it works out more acurate if you use the same method of measuring as them then you dont get a tolerence creep.

i myself got my first drawing board (a rotoring A4 slide rule) at age 6. and a rotoring A3 age 9. then autocad since 1997 so and have only realy stopped drafting in the past year as a proffession. So i have a good understanding of how to design.

And the metric system is so easy to use.

freakray
04-17-2004, 10:27 AM
Funny you mention it Chris, I do all my scale modelling in metric for the reason it's easier and more accurate for me to work with. (aside from the fact I grew up on it, like you, but have learnt both).

Regardless, I think the conversion chart posted here will be useful to some members.

mike@af
04-17-2004, 11:11 AM
I normally use the metric system because I hate the english system. But for the hot rod I have to use the english system since all the dimensions I find, and squares I have are in the english system.:banghead:

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