Font Weights in Numbers
| Style | Weight |
|---|---|
| Hairline | 1 |
| Thin | 100 |
| Extra Light | 200 |
| Light | 300 |
| Semi-Light | 350 |
| Regular | 400 |
| News | 450 |
| Medium | 500 |
| Semi-Bold | 600 |
| Bold | 700 |
| Extra Bold | 800 |
| Heavy | 850 |
| Black | 900 |
| Extra Black | 950 |
There are many lists on the Internet. I’m fine with this one from FontLab.