CalcNest AI

Health Calculators

BMI, calorie, heart rate, and wellness calculators for a healthier lifestyle.

BMI Calculator

Calculate your Body Mass Index to understand where you fall on the weight classi...

BMR Calculator

Estimate your Basal Metabolic Rate — the calories your body burns at rest — usin...

TDEE Calculator

Total Daily Energy Expenditure is the total calories you burn per day including ...

Calorie Calculator

Get your daily calorie targets for maintenance, weight loss (0.5 kg/week deficit...

Body Fat Calculator

Estimate body fat percentage using the US Navy body circumference method....

Ideal Weight Calculator

Find your ideal weight range based on height using the Devine formula and health...

Water Intake Calculator

Calculate your recommended daily water intake based on body weight and activity ...

Heart Rate Zone Calculator

Find your optimal heart rate training zones using the Karvonen formula for fat b...

Pregnancy Due Date Calculator

Estimate your pregnancy due date based on the first day of your last menstrual p...

Sleep Calculator

Find the best times to go to bed based on 90-minute sleep cycles so you wake up ...

Macro Calculator

Calculate your daily macronutrient breakdown in grams based on your calorie targ...

Protein Intake Calculator

Calculate your recommended daily protein intake based on body weight and fitness...

BMI Imperial Calculator

Calculate BMI using pounds and feet/inches for those who prefer imperial measure...

Calorie Burn Calculator

Estimate how many calories you burn during any physical activity using MET (Meta...

Waist-to-Hip Ratio Calculator

Assess health risk related to body fat distribution. A higher ratio indicates mo...

One-Rep Max Calculator

Estimate your one-rep max (the maximum weight you can lift once) based on the we...

Body Surface Area Calculator

Calculate your body surface area, commonly used in medical dosage calculations....

Blood Alcohol Content Calculator

Estimate your blood alcohol content based on drinks consumed, body weight, and t...

Lean Body Mass Calculator

Calculate your lean body mass (everything except fat) from your total weight and...

Daily Fiber Calculator

Find your recommended daily fiber intake based on calorie consumption and age....

Pace Calculator

Calculate your running or walking pace in minutes per kilometer and average spee...

VO2 Max Estimate Calculator

Estimate your VO2 max (maximal oxygen consumption), a key indicator of cardiovas...

Weight Loss Calculator

Estimate how long it will take to reach your goal weight based on a daily calori...

Pregnancy Weight Gain Calculator

See the recommended weight gain range during pregnancy based on your pre-pregnan...

Creatinine Clearance Calculator

Estimate kidney function using the Cockcroft-Gault formula. Always consult a hea...

Waist-to-Height Ratio Calculator

A simple health indicator. Keeping your waist circumference to less than half yo...

Hydration Loss Calculator

Calculate fluid lost during exercise to plan your rehydration strategy....

Blood Pressure Calculator

Classify your blood pressure reading according to American Heart Association cat...

Due Date by Ultrasound Calculator

Calculate your due date using ultrasound measurements when the LMP-based date is...

Child Height Predictor Calculator

Predict a child's adult height using the mid-parental height formula. Results ar...

Smoking Cost Calculator

See how much smoking costs you daily, monthly, and yearly. A strong motivator to...

Ideal Heart Rate for Age Calculator

Find your maximum and target heart rate zones based on age using the standard fo...

Caffeine Half-Life Calculator

Estimate how much caffeine remains in your system based on the half-life of appr...

Standing Desk Calorie Burn Calculator

Compare calorie burn between standing and sitting at your desk throughout the wo...