{"id":4467,"date":"2025-08-08T11:26:58","date_gmt":"2025-08-08T09:26:58","guid":{"rendered":"https:\/\/www.drwiesner.de\/glossary\/convert-leak-rates\/"},"modified":"2026-01-14T11:51:29","modified_gmt":"2026-01-14T10:51:29","slug":"convert-leak-rates","status":"publish","type":"glossary","link":"https:\/\/www.drwiesner.de\/en\/glossary\/convert-leak-rates\/","title":{"rendered":"Convert Leak Rates"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"4467\" class=\"elementor elementor-4467 elementor-2305\" data-elementor-post-type=\"glossary\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3f6d4509 e-flex e-con-boxed e-con e-parent\" data-id=\"3f6d4509\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-232866db elementor-widget elementor-widget-text-editor\" data-id=\"232866db\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>According to DIN EN 1330, the unit [Pa*m&sup3;\/s] is defined for determining the leak rate.<\/p><p>1 Pa*m&sup3;\/s corresponds to a pressure change of one Pa in a closed volume of one m&sup3; within one second.<\/p><p>In practice, however, the units [mbar*l\/s] or [cm&sup3;\/min] are more commonly used.<\/p><p>The conversion from [Pa*m&sup3;\/s] to [mbar*l\/s] is a simple unit conversion:<\/p><p style=\"padding-left: 40px\"><em>100 Pa = 1 mbar<\/em><br><em>1 m&sup3; = 1,000 l<\/em><\/p><p>Therefore,<strong><br><\/strong><\/p><p style=\"padding-left: 40px\"><em>1 mbar *l\/s = 0.1 Pa*m&sup3;\/s<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9db7be elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"b9db7be\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-486d835 elementor-widget elementor-widget-text-editor\" data-id=\"486d835\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>With a leak rate of 1 mbar*l\/s, the pressure in one liter of volume therefore changes by 1 mbar within one second.<br>For example, from a volume of 1,000 cm&sup3; under 1,000 mbar pressure, 1 Ncm&sup3; flows out per second. (Ncm&sup3; is 1 cm&sup3; under standard conditions, i.e., at 1013.25 mbar air pressure \/ 0&deg;C)<\/p><p>Therefore, under manufacturing conditions, it approximately holds:<\/p><p style=\"padding-left: 40px\"><em>1 mbar*l\/s corresponds to 1 cm&sup3;\/s or 60 cm&sup3;\/min<\/em><\/p><p>A leak rate of 1 x 10<sup>-3<\/sup> mbar*l\/s therefore corresponds to a volume flow of 0.06 cm&sup3;\/min.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d5b0c6 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"7d5b0c6\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b154abc elementor-widget elementor-widget-text-editor\" data-id=\"b154abc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>If this value is now compared with an air-under-water test, the volume of the rising air bubbles must be calculated.<br>An air bubble with a diameter of 1 mm has a volume of 0.52 mm&sup3; or 0.00052 cm&sup3;.<\/p><p>With a leak rate of 10<sup>-3<\/sup> mbar*l\/s, 114 air bubbles with a 1 mm diameter therefore rise per minute in a liquid.<\/p><p>If the diameter of the air bubbles is 2 mm, however, an air bubble has a volume of 4.16 mm&sup3;, and their number reduces to 14.4.<\/p><p>It should be noted, however, that due to the water hardnesses and surface tensions common in Germany, the diameter of a &quot;real&quot; air bubble in an air-under-water test is even more likely to be 2.5 to 3 mm.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-518dc92 e-flex e-con-boxed e-con e-parent\" data-id=\"518dc92\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1089997 elementor-widget elementor-widget-button\" data-id=\"1089997\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.drwiesner.de\/wp-content\/uploads\/Conversion_Leak_Rates_EN.pdf\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Information Sheet<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"pdfprnt-buttons pdfprnt-buttons-glossary pdfprnt-bottom-right\"><a href=\"https:\/\/www.drwiesner.de\/en\/wp-json\/wp\/v2\/glossary\/4467?print=pdf\" class=\"pdfprnt-button pdfprnt-button-pdf\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/www.drwiesner.de\/wp-content\/plugins\/pdf-print\/images\/pdf.png\" alt=\"image_pdf\" title=\"View PDF\"\/><span class=\"pdfprnt-button-title pdfprnt-button-pdf-title\">Download<\/span><\/a><a href=\"https:\/\/www.drwiesner.de\/en\/wp-json\/wp\/v2\/glossary\/4467?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/www.drwiesner.de\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"\/><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Drucken<\/span><\/a><\/div>","protected":false},"excerpt":{"rendered":"<p>According to DIN EN 1330, the unit [Pa*m&sup3;\/s] is defined for determining the leak rate. 1 Pa*m&sup3;\/s corresponds to a pressure change of one Pa in a closed volume of one m&sup3; within one second. In practice, however, the units [mbar*l\/s] or [cm&sup3;\/min] are more commonly used. The conversion from [Pa*m&sup3;\/s] to [mbar*l\/s] is a [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"glossary-categories":[],"glossary-tags":[],"class_list":["post-4467","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Convert Leak Rates - Wiesner Pr\u00fcftechnik GmbH<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.drwiesner.de\/en\/glossary\/convert-leak-rates\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Convert Leak Rates - Wiesner Pr\u00fcftechnik GmbH\" \/>\n<meta property=\"og:description\" content=\"According to DIN EN 1330, the unit [Pa*m&sup3;\/s] is defined for determining the leak rate. 1 Pa*m&sup3;\/s corresponds to a pressure change of one Pa in a closed volume of one m&sup3; within one second. In practice, however, the units [mbar*l\/s] or [cm&sup3;\/min] are more commonly used. 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In practice, however, the units [mbar*l\/s] or [cm&sup3;\/min] are more commonly used. 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