This page brings together Figuro's health and fitness calculators: body measurements like BMI and body fat, energy needs like calories and TDEE, and life-stage tools like pregnancy due dates and ideal weight ranges. Every calculator explains which formula it uses and what the number does — and doesn't — tell you.
Body Mass Index and weight category.
Basal metabolic rate and daily calorie needs.
Estimated body fat percentage (US Navy method).
Calories your body burns at complete rest.
Estimated ideal weight based on height and sex.
Running pace, speed and finish-time estimates.
Due date and current week from your last period.
Estimated conception and ovulation date from a due date.
Estimated due date from the conception date.
Estimated one-rep max from any weight and rep count.
If your question is about body composition or weight, start with BMI for a quick, widely-used screening number, then move to Body Fat or Ideal Weight if you want a more nuanced picture — BMI alone doesn't distinguish muscle from fat.
For anything related to energy balance — losing, gaining, or maintaining weight — use BMR (your baseline resting energy use) and TDEE (BMR adjusted for activity level) before the Calorie Calculator, since calorie targets are only meaningful once you know your maintenance level.
Pregnancy tools are split by what you know: use the Due Date Calculator if you know your last period date, or the Pregnancy Conception Calculator if you're working backward from a known or estimated conception date.
Fitness performance tools like Pace and 1-Rep Max are for tracking training progress rather than general health screening — they're most useful when you log results over time rather than checking a single number once.
Is BMI still a useful measurement?
BMI is a reasonable population-level screening tool because it's quick and only needs height and weight, but it doesn't distinguish muscle from fat. A muscular athlete can show a high BMI without carrying excess fat, which is why it's best used alongside, not instead of, other measures.
How accurate are online body fat calculators?
Formula-based estimates (like the ones used here) are reasonably good for tracking your own trend over time, but they're less precise than clinical methods such as DEXA scans or skinfold calipers taken by a trained professional. Treat the number as a useful estimate, not a lab-grade measurement.
What's the difference between BMR and TDEE?
BMR is the calorie floor your body needs at complete rest. TDEE takes that number and adds the calories burned through daily movement and exercise, which is why TDEE is the more useful number for setting a calorie target.
Are these calculators a substitute for medical advice?
No. They provide general informational estimates, not a diagnosis or personalized medical guidance. If you have concerns about your weight, pregnancy, or fitness plan, it's best to speak with a qualified healthcare professional.
Why do due date and pregnancy calculators use last period date instead of conception date?
Most people know their last menstrual period date more reliably than the exact date of conception, and the standard clinical convention (used by doctors) counts gestational age from that date — so it's the more broadly usable and standard input.