Health Tools
BMI, body shape, muscle index, calories, and tape body fat
Tape-based and formula-based estimates only—not medical devices. For pure math (averages, GPA, percentages), use Calculator Tools.
BMI Calculator
Body mass index with metric or US units and category bands—height and weight only.
Open BMI Calculator →Skeletal Muscle Index Calculator
Appendicular muscle mass divided by height squared (kg/m²) with optional EWGSOP2-style cut-offs.
Open Skeletal Muscle Index Calculator →Waist-to-Hip Ratio Calculator
Waist and hip tapes, instant WHR, optional WHO-style ratio lines and Europid waist bands.
Open Waist-to-Hip Ratio Calculator →BMR and TDEE Calculator
Mifflin–St Jeor resting burn plus activity-based maintenance calories. Metric or US units.
Open BMR and TDEE Calculator →Body Fat Calculator (Tape Estimate)
U.S. Navy circumference method; explicit note that DXA and BIA often disagree by several points.
Open Body Fat Calculator (Tape Estimate) →Health Tools guide
Need unit conversion first? Try Unit Converter. For scheduling, see Time Tools.
1. How do I pick a tool?
- Choose the tool that matches what you measured today: BMI from height and weight, WHR from two tape lines, Navy body fat from neck and waist (and hip for women), and so on.
- Read the short disclaimer on each page—tape and formula estimates are not lab results.
- Switch tools from this hub when you want a different angle on the same numbers (for example BMI plus waist context).
2. Where do the numbers run?
Every tool runs locally in your browser; nothing is sent to a server for processing.
Each page documents its own equations so you can line results up with a print-out from a clinic or device.
3. What belongs in this category?
These calculators sit next to but separate from general math calculators so people browsing for grades or percentages are not mixed in with body metrics.
If something looks off, re-measure with the same posture and tape tension before chasing a new programme.
4. Practical perks
- No account wall.
- Mobile-friendly layouts shared with the rest of WithusTools.
- Copy buttons where you need to paste numbers into notes or email.
5. Typical uses
- Double-checking paperwork before a consult.
- Classroom demos on how indices are normalised.
- Rough tracking when you already own a tape measure and nothing else.