Hi

Could someone please tell me how to calculate the area of an oval

shape? does someone have a chart for different sizes of different

gauges for sterling for weight estimation?

Thanks in advance.

Rajah

Hi

Could someone please tell me how to calculate the area of an oval

shape? does someone have a chart for different sizes of different

gauges for sterling for weight estimation?

Thanks in advance.

Rajah

`does someone have a chart for different sizes of different gauges for sterling for weight estimation?`

Hi,

Check out our MetalCalc at : http://www.ganoksin.com/MetalCalc/

MetalCalc helps calculate the length or weight of various

precious metal products based on the dimensions you enter. The

available metals include 10K, 14K, and 18K gold, sterling silver,

pure silver, and platinum.

Hanuman

Dr. E. Aspler

aspler@ganoksin.com

Managing Director

Ganoksin Jewelry Co.,Ltd

Webmaster Ganoksin Online

ICQ # 864 5224

Oval area =(3.14*(width+length)2)/16

in other words= width plus length squared, multiplied by 3.14,

all divided= by 16.

example: oval 5 by 7

- =(3.14*(5+7)2)/16
- =(3.14*(12)2)/16
- =(3.14*144)/16
- =452.16/16
- =28.26

=09

FADY SAWAYA.

@Artemis

Could someone please tell me how to calculate the area of an oval

shape?

I’ve always used pi * (average radii) squared.

Say 6mm * 4mm oval.

radii =3mm and 2 mm

(3 + 2) / 2= average radii

area = pi * 2.5 squared

area = 3.14159 * 6.25

area = 19.63mm

Am I doin’ something wrong?

Bruce D. Holmgrain

@Bruce_Holmgrain

http://205.177.16.22

703-593-4652

`Could someone please tell me how to calculate the area of an oval shape?`

The area of an oval (ellipsoid) is: A= pi (ab) where A= area,

p1 = = 3.1416, a = 1/2 of the long dimension, b = 1/2 the

short dimension. Example: = area of 10x8 oval, A = 3.1416 x 5 x

4= 62.832.

`does someone have a chart for different sizes of different gauges for sterling for weight estimation?<<`

See the ‘Weight Charts’ in Tim McCreight’s ‘The Complete

Metalsmith’. The= re are lots of other valuable formulae & ideas

in this book. IMHO, anyone in the jewelry industry should be

required to own & USE it.

Dave

Could someone please tell me how to calculate the area of an oval

shape? does someone have a chart for different sizes of different

gauges for sterling for weight estimation?

Forgot about the silver weight estimation. By multiplying the

previous area by the thickness, you will have the volume in mm.

There are 1000 cubic mm to a cc and one cc of sterling weighs 10.36

grams( the specific gravity). So for a thickness of say, 2mm:1

```
19.63mm * 2mm = 39.26 cubic mm
39.26 cubic mm = .03926 cc
mass = 10.36 * .03926
mass = .4068
```

I hope that’s right. Sometimes I blow it though.

Bruce D. Holmgrain

@Bruce_Holmgrain

http://205.177.16.22

703-593-4652

I have not seen the formula given for an oval. It is as follows:

A=3.14 xdD where d is the long diameter and D is the short diameter

of the oval. This will give you the surface area. Look in the metal

calulations for that much area for a given gauge thichness and you

can determine the total weight.