Calculators to help you get fitter
38 tools matched to this goal.
Total Body Water Calculator
Estimate your body water using the Watson formula.
Body Fat from BMI Calculator
Estimate body fat percentage from BMI, age and sex (Deurenberg).
Fat-Free Mass Index Calculator
Lean mass relative to height, normalised for comparison.
Daily Carbohydrate Target Calculator
Grams of carbohydrate per day from your calorie goal and carb share.
Daily Calcium Needs Calculator
Recommended daily calcium based on age and sex.
Daily Iron Needs Calculator
Recommended daily iron intake for adults by sex and age.
Target Heart Rate Calculator
Heart rate training zones using the Karvonen method.
Max Heart Rate Calculator
Maximum heart rate from several published formulas.
VO2 Max Calculator
Estimate aerobic fitness from the Cooper 12-minute run.
One-Rep Max Calculator
Estimate your max lift from a lighter set.
Calories Burned Running Calculator
Calories burned for a run of any distance.
Steps to Calories Calculator
Convert your daily steps to distance and calories.
Running Pace & Race Predictor
Pace per km and mile plus predicted race times.
Cycling Calories Calculator
Calories burned cycling by speed and time.
Calories Burned by Activity
Compare calories burned across ten activities.
Heart Rate Recovery Calculator
How quickly your pulse drops one minute after exercise.
Training Volume Calculator
Total weight lifted in a workout: sets × reps × load.
Weekly Activity Goal Calculator
Check your weekly minutes against the 150-minute moderate activity guideline.
Walking Time for Distance Calculator
How long a walk takes at your speed.
Steps for Distance Calculator
Estimate how many steps a distance takes from your height.
Interval Training Time Calculator
Total time for work and rest intervals.
Swim Pace Calculator
Your pace per 100 metres from distance and total time.
Race Time Equivalent Calculator
Predict a finish time at a new distance from a recent race (Riegel formula).
Speed and Pace Converter
Convert km/h into mph and minutes per kilometre.
Pool Laps Calculator
Number of lengths needed to swim a set distance.
Warm-Up Sets Calculator
Warm-up weights as a percentage of your working weight.
Sweat Rate Calculator
Estimate how much you sweat per hour to plan fluid intake.
Rockport One-Mile Walk Fitness Test
Estimate VO2 max from a one-mile walk time and heart rate.
Resting Heart Rate Category Calculator
Check your resting pulse against common adult ranges.
Pulse Count Heart Rate Calculator
Work out heart rate from beats counted in 15 seconds.
Kids Daily Activity Check
Compare a child’s daily active minutes with the 60-minute guideline for ages 6–17.
Water Intake Calculator
Daily water needs for your weight, exercise and climate.
Daily Step Goal Planner
Build up your steps gradually toward a goal.
Sitting Time Calculator
How much of your waking day you spend sitting.
Habit Formation Calculator
How far along you are toward making a habit automatic.
Active Commute Minutes Calculator
Weekly minutes of walking or cycling to work or school.
Heat Index Calculator
Feels-like temperature from air temperature and humidity (°F).
Gym Cost per Visit Calculator
Work out what each gym visit really costs.
Other goals
- Lose weight
- Build muscle
- Eat better
- Get fitter
- Protect my heart
- Manage blood sugar
- Pregnancy & fertility
- Care for my child
- Sleep better
- Mental wellbeing
- Cut back on drink, smoke & caffeine
- Understand my lab results
Related guides
Heart Rate Zones Explained
Train smarter by understanding the five zones and what each does.
Fitness & ExerciseHow to Find Your Maximum Heart Rate
Compare the common formulas and learn why they are only estimates.
Fitness & ExerciseWhat Is VO2 Max and How Can You Improve It?
Aerobic capacity is one of the strongest predictors of longevity.