Kids BMI calculator
The Benefits of a Kids BMI Calculator: A Simple Tool for Healthy Growth
A Kids BMI Calculator is a valuable tool for parents and caregivers to track their child’s growth and ensure they maintain a healthy weight. BMI (Body Mass Index) is a measurement that evaluates a child’s weight in relation to their height, helping to identify whether they fall within a healthy range. This tool is especially beneficial in today’s world, where childhood obesity and underweight concerns are rising.
1. Helps Monitor Healthy Growth
One of the biggest benefits of using a BMI calculator for kids is that it helps parents track their child’s growth pattern over time. Since children grow at different rates, a BMI calculator considers age and gender-specific percentiles to provide accurate insights. This ensures that kids are developing at a healthy pace, rather than just comparing their weight to adult standards.
2. Early Detection of Weight Issues
Childhood obesity is a growing concern worldwide. Using a kids BMI calculator can help parents and doctors detect early signs of being overweight or underweight. By identifying these issues early, families can take the necessary steps to improve diet, increase physical activity, and encourage healthier habits before serious health problems arise.
3. Encourages Healthy Eating Habits
A BMI calculator provides insight into whether a child is in a healthy weight range, prompting parents to adjust their child’s diet and nutrition accordingly. If a child’s BMI indicates underweight or overweight status, parents can work with healthcare professionals to develop a balanced meal plan rich in essential nutrients.
4. Supports Physical Activity Goals
Children who maintain a healthy BMI are more likely to be physically active, which improves overall well-being. If a BMI result suggests that a child is overweight, parents can focus on age-appropriate exercises like cycling, swimming, and outdoor play to encourage movement.
5. Boosts Confidence and Self-Esteem
A healthy BMI is not just about weight—it also influences mental well-being. Children who maintain a healthy weight range often feel more confident in their bodies, leading to higher self-esteem and better social interactions. On the other hand, detecting BMI-related concerns early can help prevent body image issues in the future.
6. Provides a Simple & Free Health Assessment
Many kids BMI calculators are available online for free, making them a quick and convenient tool for parents. Instead of scheduling frequent doctor visits, parents can check their child’s BMI at home and consult a pediatrician only if necessary.
Conclusion
Using a Kids BMI Calculator is an easy yet effective way to monitor children’s growth, detect weight issues early, and encourage healthy lifestyle habits. It helps parents make informed decisions about nutrition, exercise, and overall well-being. By regularly checking BMI, families can ensure their kids stay healthy and active throughout childhood and beyond.
#calc_wrapper{ --family-calc-vis:dm sans,sans-serif; --title-color:#fff; --values-color:#394f5c; --text-color:#000; } .toggle-switch { display: inline-block; position: relative; width: 30px; height: 17px; margin-left:15px; margin-top: 4px; } .toggle-switch input { display: none; } .toggle-switch-slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; border-radius: 17px; transition: 0.4s; } .toggle-switch-slider:before { position: absolute; content: ""; height: 13px; width: 13px; left: 2px; bottom: 2px; background-color: white; border-radius: 50%; transition: 0.4s; } input:checked + .toggle-switch-slider { background-color: #4f94d4; } input:checked + .toggle-switch-slider:before { transform: translateX(13px); } .imperial_inputs{ display:none; }
');
$('#calc_input_button').addClass('re');
var bmi = (parseFloat(weight)/(parseInt(height)/100*parseInt(height)/100)).toFixed(2);
console.log(bmi);
if( bmi 12){
left = (bmi - 12)*($('.calc_info_line_underweight').width()/6.5);
console.log(left);
}
$('.calc_info_line_result_wrapper').css('left',(left-30)+'px' );
}
if(bmi >= 18.5 && bmi 18.5){
left = (bmi - 18.5)*($('.calc_info_line_healthy').width()/6.5);
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width())-30)+'px' );
}
if(bmi >= 25 && bmi 25){
left = (bmi - 25)*($('.calc_info_line_overweight').width()/5);
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width()+$('.calc_info_line_healthy').width())-30)+'px' );
}
if(bmi >= 30 ){
$('.calc_info_placeholder.e1740769904').css('display','none');
$('.calc_info_data.e1740769904').css('display','block');
$('#calc_bmi').html(bmi);
$('#calc_conclusion').html('Obese');
var left = 0;
if(bmi > 30){
left = (bmi - 30)*($('.calc_info_line_obese').width()/5);
}
if(bmi > 35){
left = $('.calc_info_line_obese').width();
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width()+$('.calc_info_line_healthy').width() +$('.calc_info_line_overweight').width())-30)+'px' );
}
var healthy_min = Math.round(18.5 * (parseInt(height)/100*parseInt(height)/100));
var healthy_max = Math.round(24.99 * (parseInt(height)/100*parseInt(height)/100));
if(units == 'metric'){
$('#healthy_weight').html(healthy_min+' - '+healthy_max);
$('#calc_info_conclusionLb').css('display','none');
$('#calc_info_conclusion').css('display','block');
}else{
$('#healthy_weightLb').html(Math.round(healthy_min*2.20462)+' - '+Math.round(healthy_max*2.20462));
$('#calc_info_conclusionLb').css('display','block');
$('#calc_info_conclusion').css('display','none');
}
//$('#healthy_weightLb').html(Math.round(healthy_min*2.20462)+' - '+Math.round(healthy_max*2.20462));
}
}else{
var feets = $('#calc_height_input_ft').val();
var inches = $('#calc_height_input_in').val();
if(isNaN(parseFloat(feets))){
feets = 0;
}
if(isNaN(parseFloat(inches))){
inches = 0;
}
var height_imp = ((parseFloat(feets) + parseFloat(inches) / 12) * 30.48).toFixed(0);
if(height_imp 225 ){
$('.alert-mess[for="calc_height_input_ft"]').css('opacity','1');
$('#calc_height_input_ft').addClass('alert');
$('#calc_height_input_in').addClass('alert');
can = false;
}else{
$('.alert-mess[for="calc_height_input_ft"]').css('opacity','0');
$('#calc_height_input_ft').removeClass('alert');
$('#calc_height_input_in').removeClass('alert');
}
height = height_imp;
var pounds = $('#calc_weight_input_lb').val();
var stones = $('#calc_weight_input_st').val();
if(isNaN(parseFloat(pounds))){
pounds = 0;
}
if(isNaN(parseFloat(stones))){
stones = 0;
console.log('alo')
}
var weight_imp = ((parseFloat(pounds) + parseFloat(stones) / 14) / 2.20462 ).toFixed(0);
if(weight_imp 500){
$('.alert-mess[for="calc_weight_input_lb"]').css('opacity','1');
$('#calc_weight_input_lb').addClass('alert');
$('#calc_weight_input_st').addClass('alert');
can = false;
}else{
$('.alert-mess[for="calc_weight_input_lb"]').css('opacity','0');
$('#calc_weight_input_lb').removeClass('alert');
$('#calc_weight_input_st').removeClass('alert');
}
console.log(parseFloat(stones))
weight = weight_imp;
//console.log(can);
if(can){
$('#calc_input_button').html('Recalculate BMI ');
$('#calc_input_button').addClass('re');
var bmi = (parseFloat(weight)/(parseInt(height)/100*parseInt(height)/100)).toFixed(2);
console.log(bmi);
if( bmi 12){
left = (bmi - 12)*($('.calc_info_line_underweight').width()/6.5);
console.log(left);
}
$('.calc_info_line_result_wrapper').css('left',(left-30)+'px' );
}
if(bmi >= 18.5 && bmi 18.5){
left = (bmi - 18.5)*($('.calc_info_line_healthy').width()/6.5);
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width())-30)+'px' );
}
if(bmi >= 25 && bmi 25){
left = (bmi - 25)*($('.calc_info_line_overweight').width()/5);
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width()+$('.calc_info_line_healthy').width())-30)+'px' );
}
if(bmi >= 30 ){
$('.calc_info_placeholder.e1740769904').css('display','none');
$('.calc_info_data.e1740769904').css('display','block');
$('#calc_bmi').html(bmi);
$('#calc_conclusion').html('Obese');
var left = 0;
if(bmi > 30){
left = (bmi - 30)*($('.calc_info_line_obese').width()/5);
}
if(bmi > 35){
left = $('.calc_info_line_obese').width();
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width()+$('.calc_info_line_healthy').width() +$('.calc_info_line_overweight').width())-30)+'px' );
}
var healthy_min = Math.round(18.5 * (parseInt(height)/100*parseInt(height)/100));
var healthy_max = Math.round(24.99 * (parseInt(height)/100*parseInt(height)/100));
if(units == 'metric'){
$('#healthy_weight').html(healthy_min+' - '+healthy_max);
$('#calc_info_conclusionLb').css('display','none');
$('#calc_info_conclusion').css('display','block');
}else{
$('#healthy_weightLb').html(Math.round(healthy_min*2.20462)+' - '+Math.round(healthy_max*2.20462));
$('#calc_info_conclusionLb').css('display','block');
$('#calc_info_conclusion').css('display','none');
}
}
}
break;
}
}
function check_imperial(can){
var feets = $('#calc_height_input_ft').val();
var inches = $('#calc_height_input_in').val();
if(isNaN(parseFloat(feets))){
feets = 0;
}
if(isNaN(parseFloat(inches))){
inches = 0;
}
var height_imp = ((parseFloat(feets) + parseFloat(inches) / 12) * 30.48).toFixed(0);
if(height_imp 225 ){
$('.alert-mess[for="calc_height_input_ft"]').css('opacity','1');
$('#calc_height_input_ft').addClass('alert');
$('#calc_height_input_in').addClass('alert');
can = false;
}else{
$('.alert-mess[for="calc_height_input_ft"]').css('opacity','0');
$('#calc_height_input_ft').removeClass('alert');
$('#calc_height_input_in').removeClass('alert');
}
height = height_imp;
var pounds = $('#calc_weight_input_lb').val();
var stones = $('#calc_weight_input_st').val();
if(isNaN(parseFloat(pounds))){
pounds = 0;
}
if(isNaN(parseFloat(stones))){
stones = 0;
console.log('alo')
}
var weight_imp = ((parseFloat(pounds) + parseFloat(stones) / 14) / 2.20462 ).toFixed(0);
if(weight_imp 500){
$('.alert-mess[for="calc_weight_input_lb"]').css('opacity','1');
$('#calc_weight_input_lb').addClass('alert');
$('#calc_weight_input_st').addClass('alert');
can = false;
}else{
$('.alert-mess[for="calc_weight_input_lb"]').css('opacity','0');
$('#calc_weight_input_lb').removeClass('alert');
$('#calc_weight_input_st').removeClass('alert');
}
console.log(parseFloat(stones))
weight = weight_imp;
return can;
}
addEventListener("keydown", moveRect);
const fweight = x => ( (x.toString().includes('.')) ? (x.toString().split('.').pop().length) : (0) );
var height = '';
var weight = '';
var checkingRegExp = new RegExp(/^(\d)$/g);
$('#calc_height_input').on('input',function(){
if(/^[\d.]*$/.test($(this).val()) && $(this).val().split(".").length < 3){
height = $(this).val();
}else{
$(this).val(height);
}
if(parseInt($(this).val()) 225 || !Number.isInteger(parseInt($(this).val())) || $(this).val()[0]=='0'){
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','1');
$(this).addClass('alert');
}else{
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','0');
$(this).removeClass('alert');
}
})
$('#calc_weight_input').on('input',function(){
if(/^[\d.]*$/.test($(this).val()) && $(this).val().split(".").length < 3 ){
weight = $(this).val();
}else{
$(this).val(weight);
}
if(parseFloat($(this).val()) 500 || fweight(parseFloat($(this).val())) > 1 || parseFloat($(this).val())!=$(this).val() || $(this).val()[0]=='0'){
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','1');
$(this).addClass('alert');
can = false;
}else{
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','0');
$(this).removeClass('alert');
}
})
var prev1 = 0;
var prev2 = 0;
var prev3 = 0;
var prev4 = 0;
$('#calc_height_input_ft').on('input',function(){
if(/^[\d.]*$/.test($(this).val())){
prev1 = $(this).val();
}else{
$(this).val(prev1);
}
var can = check_imperial(true);
})
$('#calc_height_input_in').on('input',function(){
if(/^[\d.]*$/.test($(this).val())){
prev2 = $(this).val();
}else{
$(this).val(prev2);
}
var can = check_imperial(true);
})
$('#calc_weight_input_lb').on('input',function(){
if(/^[\d.]*$/.test($(this).val())){
prev3 = $(this).val();
}else{
$(this).val(prev3);
}
var can = check_imperial(true);
})
$('#calc_weight_input_st').on('input',function(){
if(/^[\d.]*$/.test($(this).val())){
prev4 = $(this).val();
}else{
$(this).val(prev4);
}
var can = check_imperial(true);
})
$('#calc_input_button').on('click',function(){
var can = true;
if(units == 'metric'){
$('#calc_height_input').each(function(){
if(parseInt($(this).val()) 225 || !Number.isInteger(parseInt($(this).val())) || $(this).val()[0]=='0'){
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','1');
$(this).addClass('alert');
can = false;
}else{
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','0');
$(this).removeClass('alert');
height = $(this).val();
}
})
$('#calc_weight_input').each(function(){
if(parseFloat($(this).val()) 500 || fweight(parseFloat($(this).val())) > 1 || parseFloat($(this).val())!=$(this).val() || $(this).val()[0]=='0'){
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','1');
$(this).addClass('alert');
can = false;
}else{
$('.alert-mess[for="'+$(this).attr('id')+'"]').css('opacity','0');
$(this).removeClass('alert');
weight = $(this).val();
}
})
}else{
if(can){
can = check_imperial(true);
}
}
//console.log(can);
if(can){
$('#calc_input_button').html('Recalculate BMI ');
$('#calc_input_button').addClass('re');
console.log(weight)
console.log(height)
var bmi = (parseFloat(weight)/(parseInt(height)/100*parseInt(height)/100)).toFixed(2);
console.log(bmi);
if( bmi 12){
left = (bmi - 12)*($('.calc_info_line_underweight').width()/6.5);
console.log(left);
}
$('.calc_info_line_result_wrapper').css('left',(left-30)+'px' );
}
if(bmi >= 18.5 && bmi 18.5){
left = (bmi - 18.5)*($('.calc_info_line_healthy').width()/6.5);
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width())-30)+'px' );
}
if(bmi >= 25 && bmi 25){
left = (bmi - 25)*($('.calc_info_line_overweight').width()/5);
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width()+$('.calc_info_line_healthy').width())-30)+'px' );
}
if(bmi >= 30 ){
$('.calc_info_placeholder.e1740769904').css('display','none');
$('.calc_info_data.e1740769904').css('display','block');
$('#calc_bmi').html(bmi);
$('#calc_conclusion').html('Obese');
var left = 0;
if(bmi > 30){
left = (bmi - 30)*($('.calc_info_line_obese').width()/5);
}
if(bmi > 35){
left = $('.calc_info_line_obese').width();
}
$('.calc_info_line_result_wrapper').css('left',((left+$('.calc_info_line_underweight').width()+$('.calc_info_line_healthy').width() +$('.calc_info_line_overweight').width())-30)+'px' );
}
var healthy_min = Math.round(18.5 * (parseInt(height)/100*parseInt(height)/100));
var healthy_max = Math.round(24.99 * (parseInt(height)/100*parseInt(height)/100));
if(units == 'metric'){
$('#healthy_weight').html(healthy_min+' - '+healthy_max);
$('#calc_info_conclusionLb').css('display','none');
$('#calc_info_conclusion').css('display','block');
}else{
$('#healthy_weightLb').html(Math.round(healthy_min*2.20462)+' - '+Math.round(healthy_max*2.20462));
$('#calc_info_conclusionLb').css('display','block');
$('#calc_info_conclusion').css('display','none');
}
}
})
})( jQuery );
})