{"id":343529,"date":"2020-07-30T08:42:00","date_gmt":"2020-07-30T06:42:00","guid":{"rendered":"https:\/\/gymbeam.com\/blog\/?p=343529"},"modified":"2023-08-10T19:49:09","modified_gmt":"2023-08-10T17:49:09","slug":"bmi-calculator","status":"publish","type":"post","link":"https:\/\/gymbeam.com\/blog\/bmi-calculator\/","title":{"rendered":"Online BMI Calculator"},"content":{"rendered":"\n<p>BMI or Body Mass Index, in the Body Mass Index, is one of the most well-known methods of measuring obesity. The result of BMI is a number that determines the possibility of health risk based on your body weight and height. The BMI formula is:<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>BMI = your body weight in kg \/ (height in m)2<\/strong><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"is-style-default wp-block-heading\" id=\"how-to-use-a-bmi-calculator\">How to use a BMI calculator?<\/h2>\n\n\n\n<p>Include your body weight, height and gender in the form. Our online BMI calculator then calculates your BMI quickly and easily.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<style>\n    #calc {\n        font-size: 13px;\n    }\n\n    #calc .bmi-calculator,\n    #calc #bmi_area {\n        margin: auto;\n        max-width: 430px;\n    }\n\n    #calc .bmi-description p,\n    #calc .bmi-description a {\n        margin-bottom: 20px;\n        text-align: left;\n    }\n\n    #calc .bmi-description .bmi-formula {\n        margin-bottom: 40px;\n        text-align: center;\n    }\n\n    .bmi-calculator-block {\n        margin: 50px 0;\n        \/* BMI Calculator *\/\n\n        \/* BMI Result *\/\n\n    }\n\n    .bmi-calculator-block .bmi-calculator {\n        background-color: black;\n    }\n\n    .bmi-calculator-block .bmi-calculator form {\n        margin: auto;\n        padding: 20px 0;\n        width: 60%;\n    }\n\n    .bmi-calculator-block .bmi-calculator form label {\n        align-self: flex-end;\n        color: white;\n        text-align: left;\n    }\n\n    @media screen and (max-width: 375px) {\n        .bmi-calculator-block .bmi-calculator form label {\n            margin-bottom: 5px;\n            width: 100%;\n        }\n    }\n\n    .bmi-calculator-block .bmi-calculator form .input-box {\n        display: flex;\n        justify-content: space-between;\n        margin-bottom: 25px;\n    }\n\n    @media screen and (max-width: 375px) {\n        .bmi-calculator-block .bmi-calculator form .input-box {\n            flex-direction: column;\n        }\n    }\n\n    .bmi-calculator-block .bmi-calculator form .input-box input[type=\"number\"] {\n        border: 0;\n        flex-grow: 1;\n        height: 100%;\n        max-width: 50%;\n        padding: 5px;\n        text-align: center;\n    }\n\n    @media screen and (max-width: 375px) {\n        .bmi-calculator-block .bmi-calculator form .input-box input[type=\"number\"] {\n            max-width: 100%;\n        }\n    }\n\n    .bmi-calculator-block .bmi-calculator form .input-box img {\n        width: auto;\n        cursor: pointer;\n        margin: 0 5px;\n    }\n\n    .bmi-calculator-block .bmi-calculator form .input-box input:focus {\n        box-shadow: none;\n        outline: none;\n    }\n\n    @media screen and (max-width: 425px) {\n        .bmi-calculator-block .bmi-calculator form .input-box:first-child {\n            flex-direction: column;\n        }\n\n        .bmi-calculator-block .bmi-calculator form .input-box:first-child label {\n            align-self: self-start;\n        }\n\n        .bmi-calculator-block .bmi-calculator form .input-box:first-child div {\n            margin-top: 10px;\n        }\n    }\n\n    @media screen and (max-width: 375px) {\n        .bmi-calculator-block .bmi-calculator form .input-box:first-child {\n            margin-bottom: 10px;\n        }\n    }\n\n    .bmi-calculator-block .bmi-calculator form input[type=\"button\"] {\n        border: 0;\n        color: black;\n        background-color: #ff4100;\n        padding: 5px 10px;\n        font-weight: bold;\n        font-size: 15px;\n        white-space: normal;\n        width: 100%;\n    }\n\n    .bmi-calculator-block .bmi-calculator form input[type=\"button\"]:disabled {\n        color: white;\n        opacity: 0.5;\n    }\n\n    .bmi-calculator-block #bmi_area {\n        background-color: #ff4100;\n        margin-top: 5px;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result {\n        display: flex;\n        justify-content: space-around;\n        padding: 20px 20px;\n        flex-wrap: wrap;\n        min-height: 110px;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result div {\n        align-self: center;\n        text-align: left;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result h1,\n    .bmi-calculator-block #bmi_area #bmi-result h2,\n    .bmi-calculator-block #bmi_area #bmi-result p {\n        margin: 0;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result h2,\n    .bmi-calculator-block #bmi_area #bmi-result p {\n        color: black;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result h2 {\n        font-weight: 600;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result .bmi-result-number {\n        font-size: 20px;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result .bmi-result-number p {\n        color: white !important;\n        font-size: 50px !important;\n        font-weight: normal !important;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result .bmi-result-description {\n        margin-right: 0;\n    }\n\n    .bmi-calculator-block #bmi_area #bmi-result #description-result p {\n        font-size: 17px;\n        text-align: center;\n    }\n\n    \/* BMI TABLE *\/\n    #calc .bmi-table {\n        margin: 30px 0;\n    }\n\n    #calc .bmi-table table tr th {\n        text-align: center;\n        padding: 8px;\n    }\n\n    #calc .bmi-table table tr td {\n        font-weight: normal;\n    }\n\n    #calc .bmi-table table tr:first-child {\n        background-color: #ff4100;\n        color: white;\n    }\n\n    #calc .bmi-table table tr:not(:first-child) {\n        border-bottom: 1px solid lightgray;\n    }\n\n    #calc .bmi-description a {\n        color: white;\n        background-color: #ff4100;\n        padding: 10px 20px;\n        font-size: 15px;\n    }\n\n    #calc .bmi-description h3 {\n        text-align: left;\n    }\n\n<\/style>\n<div id=\"calc\">\n    <div class=\"bmi\" style=\"text-align: center;\">\n        <div class=\"bmi-calculator-block\">\n            <div class=\"bmi-calculator\">\n                <form action=\"index.php\" method=\"get\">\n\n                    <div class=\"input-box\">\n                        <label for=\"gender\">GENDER:<\/label>\n                        <div>\n                            <img decoding=\"async\" id=\"img-women\" onclick=\"changeImage(this)\"\n                                 src=\"https:\/\/gymbeam.com\/blog\/wp-content\/themes\/wp-gymbeam-blog-theme\/images\/womenOrange.png\">\n                            <img decoding=\"async\" id=\"img-men\" onclick=\"changeImage(this)\"\n                                 src=\"https:\/\/gymbeam.com\/blog\/wp-content\/themes\/wp-gymbeam-blog-theme\/images\/menWhite.png\">\n                        <\/div>\n                    <\/div>\n\n                    <div class=\"input-box\">\n                        <label for=\"cm\">HEIGHT (cm):<\/label>\n                        <input id=\"cm\" maxlength=\"3\" name=\"cm\" type=\"number\" oninput=\"disabledButton()\"\/>\n                    <\/div>\n\n                    <div class=\"input-box\">\n                        <label for=\"kg\">WEIGHT (kg):<\/label>\n                        <input id=\"kg\" maxlength=\"3\" name=\"kg\" type=\"number\" oninput=\"disabledButton()\"\/>\n                    <\/div>\n\n                    <input type=\"button\" id=\"bmi\" class=\"submit-button\" onclick=\"calculate_bmi()\" name=\"bmi\"\n                           value=\"CALCULATE BMI\" disabled\/>\n                <\/form>\n            <\/div>\n\n            <div id=\"bmi_area\">\n                <div id=\"bmi-result\">\n                    <div>\n                        <h2 id=\"bmi-result-title\">YOUR BMI:<\/h2>\n                    <\/div>\n                    <div id=\"bmi-result-number\" class=\"bmi-result-number\">\n                        <p id=\"number-result\"><\/p>\n                    <\/div>\n                    <div id=\"bmi-result-description\" class=\"bmi-result-description\">\n                        <p id=\"description-result\"><\/p>\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n\n<script type=\"text\/javascript\">\n    function calculate_bmi() {\n        let kg_field;\n        let cm_field;\n        let bmi_field;\n        let bmi_rounded;\n        let bmi;\n        let input_ok = true;\n        let bmiResultTitle;\n        let bmiResultNumber;\n        let bmiResultDescription;\n\n        kg_field = document.getElementById('kg');\n        cm_field = document.getElementById('cm');\n        bmi_field = document.getElementById('bmi');\n        bmi_area_field_number = document.getElementById('number-result');\n        bmi_area_field_description = document.getElementById('description-result');\n        bmiResultTitle = document.getElementById(\"bmi-result-title\");\n        bmiResultNumber = document.getElementById(\"bmi-result-number\");\n        bmiResultDescription = document.getElementById(\"bmi-result-description\");\n\n        if (kg_field.value < 20 || kg_field.value > 300) input_ok = false;\n        if (cm_field.value < 50 || cm_field.value > 250) input_ok = false;\n\n        if (input_ok) {\n            bmi = (kg_field.value \/ (cm_field.value * cm_field.value)) * 10000;\n            bmi_rounded = Math.round(bmi * 10) \/ 10;\n        } else bmi_field.value = 'CALCULATE BMI';\n\n        color_1 = 'bmi_result_1';\n        msg_1 = '<p><b>underweight<\/b><br>BMI below 18.5<\/p>';\n\n        color_2 = 'bmi_result_2';\n        msg_2 = '<p><b>  normal weight<\/b><br>BMI 18,5 - 24,9<\/p>';\n\n        color_3 = 'bmi_result_3';\n        msg_3 = '<p><b>overweight<\/b><br>BMI 25,0 - 29,9<\/p>';\n\n        color_4 = 'bmi_result_4';\n        msg_4 = '<p><b>obesity<\/b><br>BMI 30.0 or more<\/p>';\n\n        color_7 = 'bmi_result_0';\n        msg_7 = '<p class=\"null-result\" >  To calculate your BMI, enter your details in the form.<\/p>';\n\n        if (input_ok) {\n            if (bmi < 18.5) {\n                box_color = color_1;\n                box_msg = msg_1;\n            } else if (bmi < 25) {\n                box_color = color_2;\n                box_msg = msg_2;\n            } else if (bmi < 30) {\n                box_color = color_3;\n                box_msg = msg_3;\n            } else {\n                box_color = color_4;\n                box_msg = msg_4;\n            }\n\n            bmiResultNumber.style.display = 'block';\n            bmiResultTitle.style.display = 'block';\n            bmiResultDescription.style.alignSelf = 'center';\n\n        } else {\n            box_color = color_7;\n            box_msg = msg_7;\n            bmi_rounded = '?';\n            bmiResultNumber.style.display = 'none';\n            bmiResultTitle.style.display = 'none';\n            bmiResultDescription.style.alignSelf = 'auto';\n        }\n\n        finalhtmlNumber = bmi_rounded;\n        finalhtmlMessage = box_msg;\n\n        bmi_area_field_number.innerHTML = finalhtmlNumber;\n        bmi_area_field_description.innerHTML = finalhtmlMessage;\n    }\n\n    function disabledButton() {\n        let cm_input = document.getElementById(\"cm\").value.length;\n        let kg_input = document.getElementById(\"kg\").value.length;\n\n        if (cm_input > 0 && kg_input > 0) {\n            document.getElementById(\"bmi\").disabled = false;\n        } else {\n            document.getElementById(\"bmi\").disabled = true;\n        }\n    }\n\n    function changeImage(image) {\n        let imageID_women = document.getElementById(\"img-women\");\n        let imageID_men = document.getElementById(\"img-men\");\n\n        if (image.id == \"img-women\") {\n            imageID_women.src = \"https:\/\/gymbeam.com\/blog\/wp-content\/themes\/wp-gymbeam-blog-theme\/images\/womenOrange.png\";\n            imageID_men.src = \"https:\/\/gymbeam.com\/blog\/wp-content\/themes\/wp-gymbeam-blog-theme\/images\/menWhite.png\";\n        } else if (image.id == \"img-men\") {\n            imageID_women.src = \"https:\/\/gymbeam.com\/blog\/wp-content\/themes\/wp-gymbeam-blog-theme\/images\/womenWhite.png\";\n            imageID_men.src = \"https:\/\/gymbeam.com\/blog\/wp-content\/themes\/wp-gymbeam-blog-theme\/images\/menOrange.png\";\n        }\n    }\n<\/script>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"is-style-default wp-block-heading\" id=\"why-is-it-good-to-know-your-bmi\">Why is it good to know your BMI?<\/h2>\n\n\n\n<p>The BMI serves as a practical tool for most populations to detect malnutrition, healthy weight, overweight or obesity. This allows you to avoid possible health problems resulting from your weight. For standard BMI categories for adults, see the table below.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><center>BMI<\/center><\/th><th class=\"has-text-align-center\" data-align=\"center\"><center>body weight<\/center><\/th><th class=\"has-text-align-center\" data-align=\"center\"><center><strong>Health risk<\/strong><\/center><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">below 18,5<\/td><td class=\"has-text-align-center\" data-align=\"center\">underweight<\/td><td class=\"has-text-align-center\" data-align=\"center\">medium to high<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">18,5 \u2013 24,9<\/td><td class=\"has-text-align-center\" data-align=\"center\">healthy weight<\/td><td class=\"has-text-align-center\" data-align=\"center\">low<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">25,0 \u2013 29,9<\/td><td class=\"has-text-align-center\" data-align=\"center\">overweight<\/td><td class=\"has-text-align-center\" data-align=\"center\">secondary<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">30,0 or more<\/td><td class=\"has-text-align-center\" data-align=\"center\">obesity<\/td><td class=\"has-text-align-center\" data-align=\"center\">high<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>However, BMI results are not quite accurate because they are generally valid data of an average person. BMI can be distorted for children, young people under 18, pregnant women, active athletes and the elderly.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons alignwide is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-black-background-color has-background\" href=\"https:\/\/gymbeam.com\/blog\/what-is-a-bmi-calculator-and-is-it-reliable-at-all\/\" style=\"border-radius:0px\" target=\"_blank\" rel=\"noreferrer noopener\">Find out more about BMI<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><a href=\"https:\/\/gymbeam.com\/fat-burners\" target=\"_blank\" class=\"category-button\">\n\t<span class=\"label\">\n\t\tFat Burners\t<\/span>\n\t<svg class=\"icon-cart\" focusable=\"false\">\n\t\t<use xlink:href=\"#icon-cart\"><\/use>\n\t<\/svg>\n<\/a><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><a href=\"https:\/\/gymbeam.com\/gainers\" target=\"_blank\" class=\"category-button\">\n\t<span class=\"label\">\n\t\tGainers\t<\/span>\n\t<svg class=\"icon-cart\" focusable=\"false\">\n\t\t<use xlink:href=\"#icon-cart\"><\/use>\n\t<\/svg>\n<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Do you know your BMI? Calculate your body mass index and find out if you are underweight, healthy weight, overweight or obese. You will also learn about risks for certain health problems according to BMI.<\/p>\n","protected":false},"author":25,"featured_media":347428,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_editorskit_title_hidden":false,"_editorskit_reading_time":1,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","footnotes":""},"categories":[107],"tags":[6545,7595],"filter_section":[],"filter_attribute":[],"class_list":{"0":"post-343529","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-fitness-calculators","8":"tag-fitness-calculator","9":"tag-weight","10":"h-entry","11":"hentry"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Online BMI Calculator - GymBeam Blog<\/title>\n<meta name=\"description\" content=\"Calculate your BMI (body mass index) using our online BMI calculator. 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