{"id":39170,"date":"2026-09-18T15:58:22","date_gmt":"2026-09-18T15:58:22","guid":{"rendered":"https:\/\/baghouse.com\/?page_id=39170"},"modified":"2026-09-18T17:44:23","modified_gmt":"2026-09-18T17:44:23","slug":"air-velocity-calculator-2","status":"publish","type":"page","link":"https:\/\/baghouse.com\/es\/air-velocity-calculator-2\/","title":{"rendered":"(TEST) Air Velocity Calculator"},"content":{"rendered":"\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Designing\t\t\t\t\t\t\t\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
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\n\t\t\t\t\t\t\n\t\t\t\t\t\t\tBack to Baghouse Design Calculators\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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What Is the Air Velocity Calculator?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The Air Velocity Calculator determines the speed of air moving through your system’s ductwork, which is measured in feet per minute (fpm)<\/span>. In baghouse design, maintaining proper air velocity is critical to ensure that dust stays suspended and doesn’t settle within the ducts<\/span>. To effectively transport dust through the system, the conveying air must reach a specific threshold known as the minimum air conveying velocity<\/span>. This tool helps you verify if your duct sizing and airflow rate will achieve the ideal velocity for the type of dust you are collecting<\/span>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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How to Use This Calculator<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Using this tool requires two specific data points from your dust collection system design:<\/p>

  • CFM (Cubic Feet per Minute):<\/b> Enter the total volumetric airflow rate of your system.<\/p><\/li>

  • Duct Diameter (inches):<\/b> Enter the internal diameter of the specific duct section you are evaluating.<\/p><\/li><\/ul>

    Once you input these values and click CALCULATE<\/b>, the tool will output the resulting air velocity in fpm. You can then use the buttons below the calculator to email yourself a PDF summary of the results or request a free system sizing consultation from our engineering team<\/span>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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    Understanding the Formula<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Air velocity is calculated by dividing the volumetric airflow (CFM) by the cross-sectional area of the circular duct (in square feet).<\/p>

    The formula used in this calculator is:<\/p>

    Velocity = CFM \u00f7 [ (D\/2\/12) \u00d7 (D\/2\/12) \u00d7 \u03c0 ]<\/div>
    \u00a0<\/div><\/div>

    Variables Explained:<\/b><\/p>

    • Velocity:<\/b> The resulting speed of the air in feet per minute (fpm).<\/p><\/li>

    • CFM:<\/b> The volumetric airflow rate.<\/p><\/li>

    • D:<\/b> The Duct Diameter in inches.<\/p><\/li>

    • 24:<\/b> This denominator represents the conversion of the diameter to a radius ($D \\div 2$<\/span>), and then inches to feet ($\\div 12$<\/span>), ensuring the final area is calculated in square feet to match the CFM metric.<\/p><\/li>

    • $\\pi$<\/span>:<\/b> The mathematical constant (~3.14159) used to calculate the area of a circle.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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      \n\t\t\t\t\t\r\n\r\n\r\n \r\n \r\n Air Velocity Calculator<\/title>\r\n <style>\r\n .can-velocity-calculator,\r\n .can-velocity-calculator * {\r\n box-sizing: border-box !important;\r\n font-family: Verdana, sans-serif !important;\r\n line-height: 1.2 !important;\r\n }\r\n\r\n .can-velocity-calculator {\r\n width: 100% !important;\r\n padding: 30px 20px !important;\r\n }\r\n\r\n .can-velocity-calculator .calculator-container {\r\n max-width: 1100px !important;\r\n margin: 0 auto !important;\r\n padding: 20px !important;\r\n background-color: #fff !important;\r\n border: 1px solid #ccc !important;\r\n box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;\r\n color: #1c3b75 !important;\r\n }\r\n\r\n .can-velocity-calculator h1 {\r\n font-size: 30px !important;\r\n margin-bottom: 5px !important;\r\n text-align: center !important;\r\n font-weight: bold !important;\r\n }\r\n\r\n .can-velocity-calculator .formula-container {\r\n text-align: center !important;\r\n margin: 15px 0 !important;\r\n padding: 10px !important;\r\n background-color: #f0f4fa !important;\r\n border-radius: 6px !important;\r\n }\r\n\r\n .can-velocity-calculator .formula-label {\r\n font-size: 14px !important;\r\n font-weight: bold !important;\r\n margin-bottom: 5px !important;\r\n color: #1c3b75 !important;\r\n }\r\n\r\n .can-velocity-calculator .formula {\r\n font-size: 16px !important;\r\n font-weight: bold !important;\r\n color: #1c3b75 !important;\r\n }\r\n\r\n .can-velocity-calculator .input-row {\r\n display: flex !important;\r\n flex-wrap: wrap !important;\r\n gap: 10px !important;\r\n margin: 20px 0 !important;\r\n justify-content: center !important;\r\n }\r\n\r\n .can-velocity-calculator .input-group {\r\n flex: 1 1 30% !important;\r\n min-width: 220px !important;\r\n }\r\n\r\n .can-velocity-calculator .input-group label {\r\n display: block !important;\r\n font-size: 12px !important;\r\n margin-bottom: 2px !important;\r\n color: #333 !important;\r\n }\r\n\r\n .can-velocity-calculator .input-group input {\r\n width: 100% !important;\r\n padding: 12px !important;\r\n font-size: 13px !important;\r\n border: 1px solid #ccc !important;\r\n border-radius: 4px !important;\r\n }\r\n\r\n .can-velocity-calculator .button-wrapper {\r\n margin: 20px 0 !important;\r\n text-align: center !important;\r\n }\r\n\r\n .can-velocity-calculator button {\r\n padding: 12px 30px !important;\r\n background-color: #466bb0 !important;\r\n color: white !important;\r\n font-size: 16px !important;\r\n font-weight: bold !important;\r\n border: none !important;\r\n border-radius: 4px !important;\r\n cursor: pointer !important;\r\n box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2) !important;\r\n }\r\n\r\n .can-velocity-calculator button:hover {\r\n background-color: #355a9c !important;\r\n }\r\n\r\n .can-velocity-calculator .result-container {\r\n margin-top: 15px !important;\r\n text-align: center !important;\r\n font-size: 22px !important;\r\n font-weight: bold !important;\r\n }\r\n\r\n .can-velocity-calculator .result-label,\r\n .can-velocity-calculator .result-value {\r\n color: #466bb0 !important;\r\n }\r\n\r\n .can-velocity-calculator .result-units {\r\n color: black !important;\r\n }\r\n\r\n .can-velocity-calculator .error {\r\n color: #ff6666 !important;\r\n margin-top: 10px !important;\r\n font-size: 13px !important;\r\n text-align: center !important;\r\n }\r\n\r\n \/* Lead Capture Section Styles *\/\r\n .lead-actions {\r\n display: none;\r\n margin-top: 30px !important;\r\n padding-top: 20px !important;\r\n border-top: 1px dashed #ccc !important;\r\n }\r\n\r\n .pdf-request-container {\r\n display: flex !important;\r\n flex-wrap: wrap !important;\r\n gap: 10px !important;\r\n justify-content: center !important;\r\n margin-bottom: 15px !important;\r\n }\r\n\r\n .pdf-request-container input {\r\n padding: 12px !important;\r\n font-size: 13px !important;\r\n border: 1px solid #ccc !important;\r\n border-radius: 4px !important;\r\n min-width: 250px !important;\r\n }\r\n\r\n .btn-pdf {\r\n background-color: #28a745 !important;\r\n box-shadow: none !important;\r\n }\r\n \r\n .btn-pdf:hover {\r\n background-color: #218838 !important;\r\n }\r\n\r\n .btn-engineer {\r\n background-color: #ff8c00 !important;\r\n width: 100% !important;\r\n max-width: 600px !important;\r\n margin: 0 auto !important;\r\n display: block !important;\r\n box-shadow: none !important;\r\n }\r\n\r\n .btn-engineer:hover {\r\n background-color: #e07b00 !important;\r\n }\r\n\r\n .system-message {\r\n text-align: center !important;\r\n font-size: 13px !important;\r\n margin-bottom: 15px !important;\r\n font-weight: bold !important;\r\n }\r\n <\/style>\r\n<\/head>\r\n<body>\r\n <div class=\"can-velocity-calculator\">\r\n <div class=\"calculator-container\">\r\n <h1>AIR VELOCITY CALCULATOR<\/h1>\r\n\r\n <div class=\"formula-container\">\r\n <div class=\"formula-label\">Formula:<\/div>\r\n <div class=\"formula\">\r\n Velocity = CFM \u00f7 [ (D\/2\/12) \u00d7 (D\/2\/12) \u00d7 \u03c0 ]\r\n <\/div>\r\n <\/div>\r\n\r\n <div class=\"input-row\">\r\n <div class=\"input-group\">\r\n <label for=\"cfm\">CFM (Cubic Feet per Minute):<\/label>\r\n <input type=\"number\" id=\"cfm\" placeholder=\"Enter CFM\" step=\"any\" required \/>\r\n <\/div>\r\n <div class=\"input-group\">\r\n <label for=\"ductDiameter\">Duct Diameter (inches):<\/label>\r\n <input type=\"number\" id=\"ductDiameter\" placeholder=\"Enter Duct Diameter\" step=\"any\" required \/>\r\n <\/div>\r\n <\/div>\r\n\r\n <div class=\"button-wrapper\">\r\n <button onclick=\"calculateVelocity()\">CALCULATE<\/button>\r\n <\/div>\r\n\r\n <div class=\"result-container\">\r\n <span class=\"result-label\">Velocity = <\/span>\r\n <span id=\"resultValue\" class=\"result-value\"><\/span>\r\n <span class=\"result-units\"> fpm<\/span>\r\n <\/div>\r\n\r\n <div id=\"error\" class=\"error\"><\/div>\r\n\r\n <!-- Lead Capture Section (Hidden by default) -->\r\n <div id=\"leadActions\" class=\"lead-actions\">\r\n \r\n <div class=\"pdf-request-container\">\r\n <input type=\"email\" id=\"pdfEmail\" placeholder=\"Enter your email address\" \/>\r\n <button class=\"btn-pdf\" onclick=\"requestPDF()\">Email me these results as a PDF<\/button>\r\n <\/div>\r\n \r\n <div id=\"pdfMessage\" class=\"system-message\"><\/div>\r\n\r\n <button class=\"btn-engineer\" onclick=\"triggerEngineerReview()\">\r\n Have an engineer review this calculation \u2014 get a free system sizing consultation\r\n <\/button>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n <\/div>\r\n\r\n <script>\r\n function calculateVelocity() {\r\n const cfm = parseFloat(document.getElementById('cfm').value);\r\n const ductDiameter = parseFloat(document.getElementById('ductDiameter').value);\r\n const resultSpan = document.getElementById('resultValue');\r\n const errorDiv = document.getElementById('error');\r\n const leadActions = document.getElementById('leadActions');\r\n const pdfMessage = document.getElementById('pdfMessage');\r\n\r\n resultSpan.innerText = '';\r\n errorDiv.innerText = '';\r\n pdfMessage.innerText = '';\r\n leadActions.style.display = 'none';\r\n\r\n if (isNaN(cfm) || isNaN(ductDiameter)) {\r\n errorDiv.innerText = 'Please enter valid numbers for all fields.';\r\n return;\r\n }\r\n if (cfm <= 0 || ductDiameter <= 0) {\r\n errorDiv.innerText = 'Values must be greater than 0.';\r\n return;\r\n }\r\n\r\n const radius = ductDiameter \/ 2 \/ 12;\r\n const ductArea = radius * radius * 3.14159;\r\n const velocity = cfm \/ ductArea;\r\n \r\n resultSpan.innerText = velocity.toFixed(2);\r\n \r\n \/\/ Reveal lead generation block on successful calculation\r\n leadActions.style.display = 'block';\r\n }\r\n\r\n function requestPDF() {\r\n const email = document.getElementById('pdfEmail').value;\r\n const msg = document.getElementById('pdfMessage');\r\n const cfm = document.getElementById('cfm').value;\r\n const ductDiameter = document.getElementById('ductDiameter').value;\r\n const velocity = document.getElementById('resultValue').innerText;\r\n\r\n if (!email || !email.includes('@')) {\r\n msg.style.color = '#ff6666';\r\n msg.innerText = 'Please enter a valid email address.';\r\n return;\r\n }\r\n\r\n msg.style.color = '#1c3b75';\r\n msg.innerText = 'Sending PDF...';\r\n\r\n \/\/ Replace this with your actual Make.com Webhook URL\r\n const webhookUrl = 'YOUR_MAKE_WEBHOOK_URL';\r\n\r\n fetch(webhookUrl, {\r\n method: 'POST',\r\n headers: { 'Content-Type': 'application\/json' },\r\n body: JSON.stringify({\r\n calculator_type: 'Air Velocity',\r\n email: email,\r\n cfm: cfm,\r\n diameter: ductDiameter,\r\n velocity: velocity\r\n })\r\n })\r\n .then(() => {\r\n msg.style.color = '#28a745';\r\n msg.innerText = 'PDF successfully sent to your email!';\r\n document.getElementById('pdfEmail').value = '';\r\n })\r\n .catch((error) => {\r\n \/\/ Cross-Origin requests to webhooks often throw a client-side error even if successful\r\n msg.style.color = '#28a745';\r\n msg.innerText = 'Request processed. Check your inbox shortly.';\r\n });\r\n }\r\n\r\n function triggerEngineerReview() {\r\n \/\/ 1. Store calculation data in browser local storage\r\n localStorage.setItem('baghouse_calc_type', 'Air Velocity');\r\n localStorage.setItem('baghouse_cfm', document.getElementById('cfm').value);\r\n localStorage.setItem('baghouse_diameter', document.getElementById('ductDiameter').value);\r\n localStorage.setItem('baghouse_velocity', document.getElementById('resultValue').innerText);\r\n\r\n \/\/ 2. Trigger the Elementor Popup\r\n \/\/ REPLACE 'XXXX' with the ID of your Elementor Popup\r\n try {\r\n jQuery(window).trigger('elementor\/frontend\/the_popup_show', 'XXXX');\r\n } catch (e) {\r\n console.error(\"Elementor popup trigger failed. Make sure you replace XXXX with your Popup ID.\");\r\n }\r\n }\r\n <\/script>\r\n<\/body>\r\n<\/html>\t\t\t\t<\/div>\n\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-066de20 e-flex e-con-boxed e-con e-parent\" data-id=\"066de20\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4c98848 elementor-widget elementor-widget-heading\" data-id=\"4c98848\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Is Duct Air Velocity?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc46a3d elementor-widget elementor-widget-text-editor\" data-id=\"dc46a3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><img decoding=\"async\" class=\" wp-image-24709 alignright\" src=\"https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-300x212.png\" alt=\"When the velocity drops below the minimum conveying velocity, dust will begin to settle or drop out of the airstream, which then accumulates into large piles that eventually choke off the duct.\" width=\"453\" height=\"320\" srcset=\"https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-300x212.png 300w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-1030x728.png 1030w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-768x543.png 768w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-1536x1086.png 1536w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-2048x1448.png 2048w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-1500x1060.png 1500w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-260x185.png 260w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-705x498.png 705w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/02\/Straight-Duct-Manifold-450x318.png 450w\" sizes=\"(max-width: 453px) 100vw, 453px\" \/>Air velocity is the speed of air moving through the ductwork. It affects the amount of dust that can be conveyed through the system. The size of the ductwork, the type of collected dust, and the airflow rate determine the ideal velocity. This velocity within the system is measured in feet per minute, or ft\/m.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e31947e elementor-widget elementor-widget-heading\" data-id=\"e31947e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Importance of Air Velocity In Baghouse Design<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-245e2e0 elementor-widget elementor-widget-text-editor\" data-id=\"245e2e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Proper air velocity ensures that dust stays suspended and doesn’t settle in the ducts.<\/p><p>In order to transport the dust through the system, the conveying air must reach a value called the <strong>minimum air conveying velocity<\/strong>. If the air velocity is below this value, the dust will ultimately settle at the bottom of the duct.<\/p><p>The<strong> capture velocity <\/strong>is the conveying air velocity at the point of introduction of the solids in the duct, usually a hood or a direct duct connection to a piece of equipment. In order to be able to transport the dust, the velocity must be greater than the<strong> minimum conveying velocity<\/strong> of the dust. Air velocity within the system is measured in feet per minute, or ft\/min.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-308baef elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"308baef\" data-element_type=\"widget\" data-e-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-025579b elementor-widget elementor-widget-text-editor\" data-id=\"025579b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong data-start=\"5831\" data-end=\"5839\">Note<\/strong>: This calculation is a good starting point, but duct material, layout, and type of dust must be considered. 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