Health & Fitness Calculators
Tools to track your calories, sleep cycles, BMI, and overall wellness goals.
Health metrics like BMI and calorie estimates are population-level screening tools — they establish a reasonable starting point, not a clinical assessment. A BMI in the 'overweight' range does not account for muscle mass; a calorie target from an average formula needs adjustment based on your actual response over several weeks of tracking.
What these tools cover
- → Calorie Calculator — Estimate daily calorie needs from BMR and activity.
- → Calorie Deficit — Calculate your TDEE and daily calorie target.
- → BMI Calculator — Check your Body Mass Index score and category.
- → 1RM Calculator — Calculate your one-rep max and get weight tables.
- → Bench Press Calc — Estimate your bench press max safely.
- → Sleep Cycle — Optimize bedtime based on 90-minute REM cycles.
- → BAC Estimator — Estimate blood alcohol levels based on biological factors.
- → Pregnancy Due Date — Calculate your baby's arrival date and track pregnancy weeks.
- → Deadlift Calculator — Calculate your one-rep max deadlift from sub-max sets.
- → One Rep Max Calculator — Estimate your 1RM from a sub-max set across barbell lifts.
- → Squat Max Calculator — Find your one-rep max squat from any sub-max set.
Calorie Calculator
Estimate daily calorie needs from BMR and activity.
Calorie Deficit
Calculate your TDEE and daily calorie target.
BMI Calculator
Check your Body Mass Index score and category.
1RM Calculator
Calculate your one-rep max and get weight tables.
Bench Press Calc
Estimate your bench press max safely.
Sleep Cycle
Optimize bedtime based on 90-minute REM cycles.
BAC Estimator
Estimate blood alcohol levels based on biological factors.
Pregnancy Due Date
Calculate your baby's arrival date and track pregnancy weeks.
Deadlift Calculator
Calculate your one-rep max deadlift from sub-max sets.
One Rep Max Calculator
Estimate your 1RM from a sub-max set across barbell lifts.
Squat Max Calculator
Find your one-rep max squat from any sub-max set.
How to get accurate results
Enter your current weight and measured height, not goal weight or estimated height. For calorie tools, select your activity level honestly — most people overestimate daily activity, which inflates the calorie target and slows progress. For strength tools, use your most recent sub-max set from within the past two weeks, not a previous personal best that may no longer reflect your current training state.
When to use these tools
- → Establishing a starting daily calorie target before beginning a structured diet or training phase
- → Planning a training cycle by calculating your estimated one-rep max from sub-max lifting sets
- → Calculating a sleep window that aligns your wake-up time with the end of a 90-minute REM cycle
- → Checking whether your BMI estimate falls in a range worth discussing with a physician
- → Estimating a pregnancy due date for early planning before a clinical confirmation
When a tool is not enough
For clinical weight management, eating disorder recovery, chronic disease nutrition, pregnancy complications, or persistent health concerns, consult a licensed physician or registered dietitian. These tools provide screening-level estimates — they do not replace a clinical evaluation based on your actual health history and lab results.
Frequently Asked Questions
What health calculators are available?
BMI calculator, calorie calculator (Mifflin-St Jeor), BAC calculator, sleep cycle calculator, calorie deficit calculator, pregnancy due date calculator, and pet age calculator.
Are these tools medically accurate?
They use validated formulas (Mifflin-St Jeor for calories, standard BAC formulas) but provide population-average estimates. They are not substitutes for medical advice.
Is my health data private?
Yes. Tool inputs stay in your browser. The site uses aggregate Google Analytics.
Should I use these tools for medical decisions?
No — use them for general wellness awareness and planning. Always consult a licensed healthcare provider for medical decisions.