Health & Lifestyle Calculators

10 free health & lifestyle calculators for New Zealanders.

BMI, body fat, calorie intake, water needs, pregnancy due date, age in years/months/days, and other personal wellness calculators using metric units.

BMI Calculator

Calculate your body mass index and see where you fall on the BMI scale. A simple health screening tool — remember BMI is just one measure of health.

Parental Leave Calculator

Calculate your paid parental leave entitlement — up to 26 weeks in NZ. Work out weekly pay (max $788.66) based on your normal income.

2026-27 FY

Calorie Calculator

Estimate your daily calorie needs based on age, height, weight, and activity level. Useful for managing your diet and fitness goals.

Pregnancy Due Date Calculator

Calculate your estimated due date and see which trimester you are in. Track key milestones and get an overview of your pregnancy timeline.

Life Insurance Calculator

Estimate how much life insurance cover you might need based on your income, debts, dependants, and future expenses like mortgage and education costs.

Public vs Private Surgery Calculator

Compare the financial cost of waiting for public elective surgery vs paying for private. Factors in productivity loss and 5-year health insurance premiums.

Body Fat Percentage Calculator

Estimate your body fat percentage using measurements like waist, neck, and hip circumference. Provides a general indication — not a clinical measurement.

Water Intake Calculator

Find out how much water you should be drinking daily based on your weight, activity level, and climate. Stay hydrated, especially during a Kiwi summer.

Alcohol Units Calculator

Calculate the number of standard drinks in your beverage. In NZ, one standard drink contains 10 grams of pure alcohol — useful for tracking your intake.

Running/Cycling Pace Calculator

Calculate pace, speed, and finish time for running and cycling. Useful for training for NZ events like the Auckland Marathon.