100% free Private Unlimited Instant

Know your numbers. Feel your best.

Free health and fitness calculators for the things people actually look up — BMI, calories, macros, body fat, heart-rate zones, pregnancy dates and more. Metric or imperial, instant results, and nothing you enter ever leaves your device.

BMI calculator Calorie calculator

20 calculators, no catch

Pick one and start instantly. Each result comes with the context to make sense of it.

Body composition

BMI Calculator Body mass index, your category and a healthy weight range. Body Fat Calculator Body fat percentage from the US Navy measurement method. Ideal Weight Calculator A healthy target weight range for your height. Lean Body Mass Calculator Lean (fat-free) mass and fat mass from height and weight. Waist-to-Hip Ratio Calculator Waist-to-hip ratio and your WHO health-risk band.

Energy & nutrition

BMR Calculator Calories your body burns at rest (Mifflin-St Jeor). TDEE Calculator Total daily calories burned, from BMR and activity. Calorie Calculator Daily calories to maintain, lose or gain weight. Macro Calculator Daily protein, carb and fat grams for your calorie goal. Protein Intake Calculator Daily protein target from your weight and activity. Water Intake Calculator Daily water target from your weight and activity.

Fitness & activity

One-Rep Max Calculator Your estimated 1RM plus a training percentage table. Target Heart Rate Calculator Max heart rate and your five training zones. Calories Burned Calculator Calories burned for an activity, by weight and time. Running Pace Calculator Pace per mile or km, plus speed, from distance and time. Calorie Deficit Calculator Daily deficit and intake to hit a weight-loss goal.

Pregnancy & life

Pregnancy Due Date Calculator Due date, current week and trimester from your last period. Ovulation Calculator Your fertile window and estimated ovulation day. Pregnancy Weight Gain Calculator Recommended pregnancy weight gain for your BMI and week. Age Calculator Exact age in years, months, days, weeks and total days.

Clear answers, no fluff.

Health numbers are easy to misread. These calculators give you the figure and the context around it — your category, a healthy range, what the result means — so you walk away understanding it, not just seeing it.

Built by CodingEagles
  • Metric and imperial, your choice
  • Clear categories, not just a number
  • No account or sign-up
  • Nothing you enter is uploaded
  • Honest, with assumptions stated
  • Works on your phone

Instant, no round-trip

Every figure updates the moment you type. No spinner, no "calculate" button, no server.

Private by design

Your measurements, dates and goals stay in your browser. Nothing is uploaded or stored.

Informational, not advice

Built to inform and educate. For anything that matters to your health, talk to a clinician.