My idea is to make easier front end developer's for defining font in responsive sizes. My tool is very useful and easy to develop responsive websites. Only basic requirements to developer must know about VW (variable widths).
To make easy tool - e.g. converting px (pixel) to vw (variable width), I make you simple calculator to convert responsive values. Also you can see table for all px from 1px to 50px ready after you add your view part pixel.
Play with calculator and make your work done quickly.