Health Tools

How Many Calories to Lose Weight

Estimate how many calories to eat to lose weight using maintenance calories, a safe deficit, and a realistic weekly pace.

Max Heart Rate Calculator

Estimate max heart rate from age, compare common formulas, and use the result for target zones and training intensity.

Normal Heart Rate by Age

See broad resting heart rate ranges by age and understand what a normal heart rate may look like.

BMR Calculator

Estimate how many calories you burn at rest with a BMR calculator that compares Mifflin-St Jeor and Harris-Benedict estimates.

Lean Body Mass Calculator

Estimate lean body mass from body weight and body fat percentage, then compare fat mass and lean mass in a simple body-composition layout.

Waist-to-Height Ratio Calculator

Estimate waist-to-height ratio to screen central fat distribution, compare it with the 0.5 rule, and review a clearer health-risk indicator than BMI alone.

Maintenance Calories Calculator

Estimate the calories needed to maintain your current weight, compare activity levels, and use the result as a practical baseline for diet planning.

Target Heart Rate Calculator

Estimate target heart rate zones for fat burn, cardio, and peak effort using age and resting heart rate.

Resting Heart Rate Calculator

Check a resting heart rate reading against broad adult reference ranges and see what low or high values may mean.

Calories Burned Calculator

Estimate calories burned during exercise from activity type, duration, and weight, with a practical comparison across workouts.

Steps to Calories Calculator

Estimate calories burned from steps, walking distance, and body weight with a practical daily movement screen.

VO2 Max Calculator

Estimate VO2 max as a simple cardiovascular fitness screen using age and resting heart rate.

Activity Level Calculator

Estimate whether your routine is sedentary, lightly active, moderately active, or very active for calorie planning.

BMI Calculator

Check an adult BMI estimate, review the healthy weight range for your height, and switch between Metric and US inputs in a clear layout.

Body Fat Calculator

Estimate body fat percentage with the Navy method, compare men and women ranges, and see fat mass, lean mass, BMI context, and measurement tips.

Calorie Calculator

Estimate daily calories for maintenance, weight loss, or muscle gain using BMR, TDEE, activity level, and goal-based calorie targets.

TDEE Calculator

Estimate total daily energy expenditure from your age, weight, height, sex, and activity level.

Ovulation Calculator

Estimate your ovulation date, 6-day fertile window, best days to try, next period, and pregnancy test timing.

Fertile Window Calculator

Estimate your 6-day fertile window, likely ovulation date, peak fertility days, and next period from your cycle dates.

Implantation Calculator

Estimate your implantation window after ovulation, see common days past ovulation, and compare timing with pregnancy test dates.

Conception Date Calculator

Estimate a likely conception date from your last period or due date, and compare the result with ovulation timing and pregnancy planning.

Period Calculator

Estimate your next period, cycle day, period end date, fertile window, and ovulation timing from your last period and cycle length.

Pregnancy Test Calculator

Find the earliest and more reliable pregnancy test dates after ovulation, implantation timing, or a missed period.

Pregnancy Calculator

Estimate due date, pregnancy week, trimester, and conception timing from your last period or conception date.

Due Date Calculator

Estimate your due date, pregnancy week, trimester, conception date, full-term window, and key milestones from LMP, conception, or IVF transfer.

Macro Calculator

Calculate daily protein, carb, and fat grams for fat loss, maintenance, or muscle gain from calories, activity, and body metrics.

Water Intake Calculator

Estimate how much water to drink per day from body weight, activity level, and climate, with litres, cups, and hydration guidance.

Sleep Calculator

Estimate optimal sleep and wake times from a fixed wake-up time or bedtime using 90-minute cycles and a fall-asleep buffer.

Sleep Cycle Calculator

Estimate a bedtime based on your wake-up time, cycle length, and how long you take to fall asleep.

Heart Rate Zone Calculator

Estimate target heart rate zones from age, resting heart rate, and a chosen training zone.

Symptom Checklist

Run through a simple symptom checklist that helps you decide whether to monitor, book a review, or seek urgent help.

Ideal Weight Calculator

Estimate a healthy weight range by height using adult BMI guidance, compare midpoint targets, and understand BMI vs body fat limits.

Calorie Deficit Calculator

Estimate your daily calorie target, weekly weight-loss pace, and calorie deficit plan from maintenance calories.