vcalc is an Sass function for calculate unit from px to vw or vmin.

Install

$ npm install --save-dev vcalc

@import 'vcalc';

Set variable $base-v-size as you want, default sets 375 (iPhone6).

$base-v-size: 320;

Useage

Name	Arg1	Arg2
vmin-calc	$values: px based value	$base: base viewport size
vw-calc	$values: px based value	$base: base viewport size

// $base-v-size: 375;
{
  font-size: vmin-calc(16px);
}

Will be 4.26667vmin, which means

Screen width	4.26667vmin In px
414px	18px
375px
320px	14px

Also can pass multiple values

{
  margin: vmin-calc(10px 20px 30px 40px);
}