Health & Fitness Tools

Widmark formula (educational only)

Decay tracker + sleep cutoff

MET-based, 35+ activities

Likely conception date, fertile window + due date

FTP + W/kg + Coggan zones

Karvonen HRR 5-zone method

Boer + Hume + James formulas

Protein/carb/fat from goal

Tanaka/Fox/Gulati/Nes equations

Predict a child's adult height from the parents

5-formula 1RM average + % table

Riegel formula across distances

Mifflin-St Jeor + TDEE multipliers

Target time → pace + splits

L/hr sweat + hydration plan

Aerobic capacity benchmark

WHtR — better than BMI

Calculate your BMI instantly using ASEAN health thresholds — metric and imperial.

Calculate your daily calorie needs in seconds — enter your details and get your maintenance calories instantly.

Calculate your ideal daily water intake based on weight, activity and climate — with ASEAN tropical heat adjustment.

Estimate your body fat percentage using the Navy method — with ASEAN-specific health ranges.

Find your ideal weight range using 5 medical formulas — with ASEAN-adjusted healthy ranges.

Calculate your pregnancy due date and current week — enter your last period or conception date.

Find the best times to wake up or go to sleep based on 90-minute sleep cycles — wake up refreshed, not groggy.

Calculate target heart rate zones

Calculate your daily protein, carbs and fat targets — based on your body, goals and activity level.

Calculate your daily calorie needs based on age, weight, height and activity level.