I made a little table for those of you who want to quickly convert fractions to decimals...something your tape measure won't do.

1/32 0.03125
1/16 0.06250
3/32 0.09375
1/8 0.12500
5/32 0.15625
3/16 0.18750
7/32 0.21875
1/4 0.25000
9/32 0.28125
5/16 0.31250
11/32 0.34375
3/8 0.37500
13/32 0.40625
7/16 0.43750
15/32 0.46875
1/2 0.50000
17/32 0.53125
9/16 0.56250
19/32 0.59375
5/8 0.62500
21/32 0.65625
11/16 0.68750
23/32 0.71875
3/4 0.75000
25/32 0.78125
13/16 0.81250
27/32 0.84375
7/8 0.87500
29/32 0.90625
15/16 0.93750
31/32 0.96875

https://swaylocks7stage.s3.us-east-2.amazonaws.com/s3fs-public/fractionsofaruler_xls_499ee7f3b5.xls

1/32 0.03125
1/16 0.06250
3/32 0.09375
1/8 0.12500
5/32 0.15625
3/16 0.18750
7/32 0.21875
1/4 0.25000
9/32 0.28125
5/16 0.31250
11/32 0.34375
3/8 0.37500
13/32 0.40625
7/16 0.43750
15/32 0.46875
1/2 0.50000
17/32 0.53125
9/16 0.56250
19/32 0.59375
5/8 0.62500
21/32 0.65625
11/16 0.68750
23/32 0.71875
3/4 0.75000
25/32 0.78125
13/16 0.81250
27/32 0.84375
7/8 0.87500
29/32 0.90625
15/16 0.93750
31/32 0.96875

https://swaylocks7stage.s3.us-east-2.amazonaws.com/s3fs-public/FractionsOfARuler.xls

I made it when I was making templates from the old Jim Kinstle book, Surfboard Design and Construction.

By the way, has anybody read this? Is it just me, or does some of his theory seem incorrect?

a bit of overkill on the significant digits… who shapes to the nearest 100,000th of an inch?

Little tiny microscopic organisms that you can’t see have been known to shape to that degree of detail… okay… good point. I was just relaying what was on my calculator with my calculations.

I did the same thing, only I still refer to the hand notes on a page on one of my desing pads…

I’m with Keith too… and I often find myself rounding anyway… depending on how I feel, or feel would be good for the particular board… Ha! But, for big scaling changes it’s a good place to start.

Thanks mate… reminded me of high school. My Mathematics teacher drummed into our heads the importance of memorising 8ths into decimal - 20 years later, I can still reel off the following without missing a beat:

1/8
0.125

1/4
0.250

3/8
0.375

1/2
0.500

5/8
0.625

3/4
0.750

7/8
0.875

1

One of the few things from high school that the alcohol didn’t destroy :slight_smile:

-Cam

Thanks man , I’ve been wondering if there’s something like this out there.

So , this would decipher those american fin manufacturer’s sites , for ex., where they talk about fins being ‘’ 4.083 in. ‘’ high ?

Good one. : )

You could always try:

http://www.unitconversion.org/typography/meters-to-inchs-conversion.html

http://www.simetric.co.uk/metres_to_feet.php

Bob

You mean that little line meant dirty second5?

I have been help bent on converting little lines

into hand signals and finger spreads.

unlearning the tape measure in times of where is

the tape measure have always been my biggest test.

the advent of Measurig itus in the late 70s

has been a progressive influence.Now in the late 20th

and early 21st century the decimalization of the measuring

board is quite confounding to all but the clan of measurers.

the left brain world is upon us .

in the end the reach around

has yet to be formerly addressed

by measuremental configurationalists

that said ,five times fast,will derive points

in the clan of sixtyeight cent word yeomen.

I have and still am deeply impressed with the desire

to transmit informationwith a ‘‘lockout’’ system

disguised as a simplification.Systems arre valuable

only when you invest or buy into said system.

the most accurate measuring system

is the grasp of the dominant hand.

I am currently working on the conversion table

of decimal to digital cubed.I am writing it

in invisible ink to be published on my right palm

and passed along with a hand shake.

the inverted system for the dyslexic

will be aviliable for those who choose

to grasp and shake hands with the left,

who are a truely diffrent group,exiled from some cultures.

…ambrose…

I mean digital was originated

counting on your fingers

the span and the cubit

were advancements

accessed even in the dark .

o.875 oh dear me.

Kawika: Those charts are very handy I made one myself a few years ago. Over time you get the numbers memorized.

Here’s a form that I made to make it easier to dial in thickness.

Just print it out laminate it and put it in your shaping bay.

hey Kawika i had that surfboard desighn and theory saved on my computer. but lost it when my computer crashed. does anyone have a link where it can be downloaded?

Your table is good for helping you memorize the most common fractions.

Everyone has at least one calculator, right? Well… I recommend one that does fractions. Casio’s are the most intuitive IMO. This one costs less than $20.

http://www.casio.com/products/Calculators_%26_Dictionaries/Fraction/FX-65X/

[img_assist|nid=1030426|title=Casio Calculator|desc=|link=none|align=left|width=83|height=100]