Calculate Your Numbers
Pick a calculator below and get your results instantly.
BMI Calculator
Enter your weight and height to calculate your Body Mass Index.
BMI is one indicator of health. It doesn't account for muscle mass — athletes often have a higher BMI despite being very lean.
1 Rep Max Calculator
Estimate your one rep max using the Epley formula — without risking a max effort lift.
Uses the Epley formula: 1RM = weight × (1 + reps ÷ 30). Best for 1–10 rep ranges.
Macro Calculator
Calculate your daily calorie and macro targets based on your goal and activity level.
Based on estimated BMR using body weight. For personalised targets based on your height, age and full stats, use the Macro Calculator inside the REVIVE app.
Daily Calorie Calculator (TDEE)
Work out how many calories you burn a day, and your target to lose, maintain or build muscle.
Estimated with the Mifflin-St Jeor formula. Track your intake and adjust after 2–3 weeks inside the REVIVE app.
Protein Calculator
Find your ideal daily protein to build muscle, lose fat or maintain.
Higher protein preserves muscle when cutting and builds it when bulking. Spread it across the day.
Body Fat Calculator
Estimate your body fat using the US Navy tape method. Measure in centimetres.
The US Navy method is a solid estimate but not as precise as a DEXA scan. Measure at the same time of day.
Water Intake Calculator
Estimate how much water to drink each day based on your weight and activity.
Drink more on hot days or during intense training. Track it in the REVIVE app.
All These Calculators Are Built Into REVIVE
Get every one of these calculators — plus AI coaching, workouts, meal plans and progress tracking — inside the REVIVE app, available on iPhone now.
