Magento Add Quantity box in List OR Grid

Easy way to Add the Quantity Box in Grid or View list

Just paste the below code in the list.phtml where you required

<form action="<?php echo $this->getAddToCartUrl($_product); ?>" method="post"> 
 <input type="text" style="border:1px solid gray;font:normal 14px Calibri;width:30px;" value="1" name="qty" />  
 <button type="submit" title="<?php echo $this->__('Add to Cart') ?>" class="button btn-cart"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button> </form>