Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/Drawing.php
public static function pixelsToCellDimension($pValue, \PhpOffice\PhpSpreadsheet\Style\Font $pDefaultFont)
    {
        // Font name and size
        $name = $pDefaultFont->getName();
        $size = $pDefaultFont->getSize();

        if (isset(Font::$defaultColumnWidths[$name][$size])) {
            // Exact width can be determined
            $colWidth = $pValue * Font::$defaultColumnWidths[$name][$size]['width'] / Font::$defaultColumnWidths[$name][$size]['px'];
        } else {
            // We don't have data for this particular font and size, use approximation by
            // extrapolating from Calibri 11
            $colWidth = $pValue * 11 * Font::$defaultColumnWidths['Calibri'][11]['width'] / Font::$defaultColumnWidths['Calibri'][11]['px'] / $size;
        }

        return $colWidth;
    }
public static function pixelsToCellDimension($pValue, \PhpOffice\PhpSpreadsheet\Style\Font $pDefaultFont)
    {
        // Font name and size
        $name = $pDefaultFont->getName();
        $size = $pDefaultFont->getSize();

        if (isset(Font::$defaultColumnWidths[$name][$size])) {
            // Exact width can be determined
            $colWidth = $pValue * Font::$defaultColumnWidths[$name][$size]['width'] / Font::$defaultColumnWidths[$name][$size]['px'];
        } else {
            // We don't have data for this particular font and size, use approximation by
            // extrapolating from Calibri 11
            $colWidth = $pValue * 11 * Font::$defaultColumnWidths['Calibri'][11]['width'] / Font::$defaultColumnWidths['Calibri'][11]['px'] / $size;
        }

        return $colWidth;
    }
public static function pixelsToCellDimension ( $ pValue , \ PhpOffice \ PhpSpreadsheet \ Style \ Font $ pDefaultFont ) { // Font name and size $ name = $ pDefaultFont -> getName ( ) ; $ size = $ pDefaultFont -> getSize ( ) ; if ( isset ( Font :: $ defaultColumnWidths [ $ name ] [ $ size ] ) ) { // Exact width can be determined $ colWidth = $ pValue * Font :: $ defaultColumnWidths [ $ name ] [ $ size ] [ 'width' ] / Font :: $ defaultColumnWidths [ $ name ] [ $ size ] [ 'px' ] ; } else { // We don't have data for this particular font and size, use approximation by // extrapolating from Calibri 11 $ colWidth = $ pValue * 11 * Font :: $ defaultColumnWidths [ 'Calibri' ] [ 11 ] [ 'width' ] / Font :: $ defaultColumnWidths [ 'Calibri' ] [ 11 ] [ 'px' ] / $ size ; } return $ colWidth ; }
Convert pixels to column width. Exact algorithm not known.
By inspection of a real Excel file using Calibri 11, one finds 1000px ~ 142.85546875
This gives a conversion factor of 7. Also, we assume that pixels and font size are proportional.

@param int $pValue Value in pixels
@param \PhpOffice\PhpSpreadsheet\Style\Font $pDefaultFont Default font of the workbook

@return int Value in cell dimension
Convert pixels to column width . Exact algorithm not known . By inspection of a real Excel file using Calibri 11 one finds 1000px ~ 142 . 85546875 This gives a conversion factor of 7 . Also we assume that pixels and font size are proportional .