BMI Calculator
Estimate body mass index from height and weight, with a plain-language category.
Related guides
Read practical articles connected to this calculator.
Why Does Weight Fluctuate Day to Day?
Weight can fluctuate day to day because the scale measures everything in your body at that moment—not only body fat. Fluid, food and drink, bowel contents, menstrual changes, exercise recovery, medicines, and measurement conditions can all move the number. Compare readings taken under similar conditions, look at a longer trend, and get medical advice for sudden unexplained change or swelling.
Fitness & MovementHow to Maintain Muscle While Losing Weight on GLP-1s
Successful weight loss is not only about losing pounds. Strength, function, and protein intake deserve a place in the plan.
GLP-1 & Weight ManagementGLP-1 Hair Loss: What to Track Before You Treat It
GLP-1 hair loss is reported with some weight-management medicines, but a prescription name alone cannot tell you why your hair is shedding. Record the timing, pattern, weight and appetite changes, nutrition difficulties, scalp symptoms, illnesses, and other medicines. Bring that record to your prescriber or a dermatologist before changing treatment or buying supplements.
GLP-1 & Weight ManagementGLP-1 Nausea After a Dose Increase: What to Do
GLP-1 nausea after a dose increase can happen, but you do not have to prove you can tolerate it. Keep food and fluids manageable, record the dose timing and symptoms, and contact your prescriber if nausea is severe, persistent, worsening, or makes it hard to eat or drink. Do not change, split, or skip doses without instructions.
Healthy range
22.9
18.5-24.9. This falls within the standard adult BMI range.
These results are educational estimates, not a diagnosis or treatment plan. For personal medical advice, pregnancy guidance, chronic conditions, eating concerns, or medication decisions, speak with a qualified health professional.
Related guides
Read practical articles connected to this calculator.
Why Does Weight Fluctuate Day to Day?
Weight can fluctuate day to day because the scale measures everything in your body at that moment—not only body fat. Fluid, food and drink, bowel contents, menstrual changes, exercise recovery, medicines, and measurement conditions can all move the number. Compare readings taken under similar conditions, look at a longer trend, and get medical advice for sudden unexplained change or swelling.
Fitness & MovementHow to Maintain Muscle While Losing Weight on GLP-1s
Successful weight loss is not only about losing pounds. Strength, function, and protein intake deserve a place in the plan.
GLP-1 & Weight ManagementGLP-1 Hair Loss: What to Track Before You Treat It
GLP-1 hair loss is reported with some weight-management medicines, but a prescription name alone cannot tell you why your hair is shedding. Record the timing, pattern, weight and appetite changes, nutrition difficulties, scalp symptoms, illnesses, and other medicines. Bring that record to your prescriber or a dermatologist before changing treatment or buying supplements.
GLP-1 & Weight ManagementGLP-1 Nausea After a Dose Increase: What to Do
GLP-1 nausea after a dose increase can happen, but you do not have to prove you can tolerate it. Keep food and fluids manageable, record the dose timing and symptoms, and contact your prescriber if nausea is severe, persistent, worsening, or makes it hard to eat or drink. Do not change, split, or skip doses without instructions.
How to use this result
Use the estimate as a starting point for learning and planning. Recheck the inputs, compare the result with how you feel day to day, and ask a qualified professional before making major changes to diet, exercise, medication, or pregnancy-related decisions.