CODE EXAMPLE FOR CSHARP

unity convert pixels to units

    using UnityEngine;
    using System.Collections;
     
    public class ResolutionCompensation : MonoBehavior
    {
    public Vector2 WorldUnitsInCamera;
    public Vector2 WorldToPixelAmount;
     
    public GameObject Camera;
     
    void Awake ()
    {
            //Finding Pixel To World Unit Conversion Based On Orthographic Size Of Camera
            WorldUnitsInCamera.y = Camera.GetComponent<Camera>().orthographicSize * 2;
            WorldUnitsInCamera.x = WorldUnitsInCamera.y * Screen.width / Screen.height;
     
            WorldToPixelAmount.x = Screen.width / WorldUnitsInCamera.x;
            WorldToPixelAmount.y = Screen.height / WorldUnitsInCamera.y;
    }
     
     
    //Taking Your Camera Location And Is Off Setting For Position And For Amount Of World Units In Camera
    public Vector2 ConvertToWorldUnits(Vector2 TouchLocation)
    {
          Vector2 returnVec2;
     
    returnVec2.x = ((TouchLocation.x / WorldToPixelAmount.x) - (WorldUnitsInCamera.x / 2)) +
    Camera.transform.position.x;
    returnVec2.y = ((TouchLocation.y / WorldToPixelAmount.y) - (WorldUnitsInCamera.y / 2)) +
    Camera.transform.position.y;
     
          return returnVec2;
    }
    }