| Characteristics of Sail Materials |
| To calculate the weight of sailcloth needed for everyday cruising sails, mainsail and foresail, take one-third of the boat's waterline length in feet and call it ounces per square yard.To convert to ounces per standart U.S sailcloth measure or metric see below. |
| American sailcloth weights are quoted in ounces for an area 36 inches by 28.5 inches.In other countries wieghts are usually quoted either under the old impreal system in ounces per square yard (36 inches by 36 inches) or according to the metric system in grams per square meter.Here's how to convert from one another |
| Imperial |
U.S |
Metric |
| 18 |
14 |
600 |
| 17 |
550 |
| 16 |
13 |
| 15 |
12 |
500 |
| 14 |
11 |
450 |
| 13 |
| 12 |
10 |
400 |
| 11 |
9 |
| 10 |
8 |
350 |
| 9 |
7 |
300 |
| 8 |
| 7 |
6 |
250 |
| 6 |
200 |
| 4 |
4 |
| 3 |
3 |
100 |
| 2 |
1 |
50 |
| 1 |
| 0 |
0 |
0 |
|
