{"id":342110,"date":"2020-07-30T08:42:00","date_gmt":"2020-07-30T06:42:00","guid":{"rendered":"https:\/\/gymbeam.com\/blog\/?p=342110"},"modified":"2026-04-24T07:45:34","modified_gmt":"2026-04-24T05:45:34","slug":"bmi-kalkulacka","status":"publish","type":"post","link":"https:\/\/gymbeam.cz\/blog\/bmi-kalkulacka\/","title":{"rendered":"Online BMI kalkula\u010dka"},"content":{"rendered":"\n<div class=\"wp-block-group has-background\" style=\"background-color:#ededed\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>Online <strong>BMI<\/strong> kalkula\u010dka m\u011b\u0159\u00ed index t\u011blesn\u00e9 hmotnosti (Body Mass Index) na z\u00e1klad\u011b t\u011blesn\u00e9 hmotnosti a v\u00fd\u0161ky podle vzorce <strong>BMI<\/strong> = hmotnost v kg \/ (v\u00fd\u0161ka v m)\u00b2. Hodnoty pod <strong>18,5<\/strong> zna\u010d\u00ed podv\u00e1hu se st\u0159edn\u00edm a\u017e vysok\u00fdm zdravotn\u00edm rizikem, <strong>18,5\u201324,9<\/strong> zdravou hmotnost s n\u00edzk\u00fdm rizikem, <strong>25\u201329,9<\/strong> nadv\u00e1hu se st\u0159edn\u00edm rizikem a <strong>30<\/strong> a v\u00edce obezitu s vysok\u00fdm rizikem.<\/p>\n\n\n\n<p><strong>BMI<\/strong> slou\u017e\u00ed jako praktick\u00fd n\u00e1stroj pro v\u011bt\u0161inu dosp\u011bl\u00e9 populace k rozpozn\u00e1n\u00ed podv\u00fd\u017eivy, nadv\u00e1hy nebo obezity. V\u00fdsledky mohou b\u00fdt zkreslen\u00e9 u d\u011bt\u00ed a ml\u00e1de\u017ee do <strong>18 let<\/strong>, t\u011bhotn\u00fdch \u017een, aktivn\u00edch sportovc\u016f a star\u0161\u00edch osob.<\/p>\n<\/div><\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>BMI nebo Body Mass Index, v p\u0159ekladu Index t\u011blesn\u00e9 hmotnosti, pat\u0159\u00ed mezi nejzn\u00e1m\u011bj\u0161\u00ed zp\u016fsoby m\u011b\u0159en\u00ed obezity. V\u00fdsledkem BMI je \u010d\u00edslo, kter\u00e9 ur\u010duje mo\u017enost zdravotn\u00edho rizika na z\u00e1klad\u011b va\u0161\u00ed t\u011blesn\u00e9 hmotnosti a v\u00fd\u0161ky. Vzorec pro v\u00fdpo\u010det BMI je:<\/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 = va\u0161e t\u011blesn\u00e1 hmotnost v kg \/ (v\u00fd\u0161ka v 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=\"wp-block-heading is-style-default\" id=\"jak-pouzivat-bmi-kalkulacku\">Jak pou\u017e\u00edvat BMI kalkula\u010dku?<\/h2>\n\n\n\n<p>Vypi\u0161te \u00fadaje o va\u0161\u00ed t\u011blesn\u00e9 hmotnosti, v\u00fd\u0161ce a pohlav\u00ed do formul\u00e1\u0159e. Na\u0161e online BMI kalkula\u010dka v\u00e1m n\u00e1sledn\u011b jednodu\u0161e a rychle vypo\u010d\u00edt\u00e1 BMI.<\/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=\"wp-block-heading is-style-default\" id=\"proc-je-dobre-vedet-sve-bmi\">Pro\u010d je dobr\u00e9 v\u011bd\u011bt sv\u00e9 BMI?<\/h2>\n\n\n\n<p>Index BMI slou\u017e\u00ed jako praktick\u00fd n\u00e1stroj pro v\u011bt\u0161inu populace na zji\u0161t\u011bn\u00ed podv\u00fd\u017eivy, zdrav\u00e9 v\u00e1hy, nadv\u00e1hy nebo obezity. D\u00edky tomu m\u016f\u017eete p\u0159edej\u00edt mo\u017en\u00fdm zdravotn\u00edm probl\u00e9m\u016fm vypl\u00fdvaj\u00edc\u00edch ze stavu va\u0161\u00ed hmotnosti. Standardn\u00ed kategorie podle BMI rozsahu pro dosp\u011bl\u00e9 najdete v tabulce.<\/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 caption-align-center\"><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>T\u011blesn\u00e1 hmotnost<\/center><\/th><th class=\"has-text-align-center\" data-align=\"center\"><center>zdravotn\u00ed riziko<\/center><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">pod 18,5<\/td><td class=\"has-text-align-center\" data-align=\"center\">podv\u00e1ha<\/td><td class=\"has-text-align-center\" data-align=\"center\">st\u0159edn\u00ed a\u017e vysok\u00e9<\/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\">zdrav\u00e1 hmotnost<\/td><td class=\"has-text-align-center\" data-align=\"center\">n\u00edzk\u00e9<\/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\">nadv\u00e1ha<\/td><td class=\"has-text-align-center\" data-align=\"center\">st\u0159edn\u00ed<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">30,0 a v\u00edce<\/td><td class=\"has-text-align-center\" data-align=\"center\">obezita<\/td><td class=\"has-text-align-center\" data-align=\"center\">vysok\u00e9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:19px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>V\u00fdsledky BMI v\u0161ak nejsou zcela p\u0159esn\u00e9, proto\u017ee jde o v\u0161eobecn\u011b platn\u00e9 \u00fadaje pr\u016fm\u011brn\u00e9ho \u010dlov\u011bka. Index BMI m\u016f\u017ee b\u00fdt zkreslen\u00fd v p\u0159\u00edpad\u011b d\u011bt\u00ed, ml\u00e1de\u017ee do 18 let, t\u011bhotn\u00fdch \u017een, aktivn\u00edch sportovc\u016f a star\u0161\u00edch lid\u00ed.<\/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 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 wp-element-button\" href=\"https:\/\/gymbeam.cz\/blog\/co-je-bmi-kalkulacka-a-je-vubec-spolehliva\/\" style=\"border-radius:0px\" target=\"_blank\" rel=\"noreferrer noopener\">Zjistit v\u00edce o BMI<\/a><\/div>\n<\/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>Zn\u00e1te svoje BMI? Vypo\u010d\u00edtejte si index t\u011blesn\u00e9 hmotnosti a zjist\u011bte, jestli m\u00e1te podv\u00e1hu, optim\u00e1ln\u00ed v\u00e1hu, nadv\u00e1hu nebo obezitu. Dozv\u00edte se i to, jak\u00e1 zdravotn\u00ed rizika v\u00e1m podle BMI hroz\u00ed. <\/p>\n","protected":false},"author":25,"featured_media":347424,"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":[30],"tags":[6549,7599],"filter_section":[],"filter_attribute":[],"class_list":{"0":"post-342110","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-fitness-kalkulacky-cs","8":"tag-fitness-kalkulacka-cs","9":"tag-vaha-cs","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 kalkula\u010dka - GymBeam Blog<\/title>\n<meta name=\"description\" content=\"Vypo\u010d\u00edtejte si BMI (index t\u011blesn\u00e9 hmotnosti) pomoc\u00ed na\u0161\u00ed online BMI kalkula\u010dky. 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