STEP 1
BMI Calculator
Calculate BMI with visual gauge, color-coded results, age/gender context, and BMI reference chart.
- metric and imperial modes
- visual BMI gauge
- color-coded categories
TASK WORKFLOW
Free Health Calculator Workflow
Use general wellness calculators as educational estimates, not medical advice.
This workflow is built for adults tracking general fitness, students, coaches, and wellness writers. It links only to FastTool pages that pass the current review-public quality gate, so every listed tool has a working interface, supporting content, and clear limits.
Recommended Tool Order
STEP 2
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) — enter age, weight, height, gender, and activity level to get daily calorie needs for maintenance, loss, and gain.
- Mifflin-St Jeor BMR formula
- 5 activity level presets
- maintenance, deficit, and surplus calories
STEP 3
Calorie Calculator
Calculate daily calorie needs using the Mifflin-St Jeor equation. Get BMR, TDEE, macro breakdown with protein/carbs/fat, SVG pie chart, and goal-based targets for weight loss or gain. Supports metric and imperial units.
- Mifflin-St Jeor BMR calculation
- TDEE with 5 activity levels
- weight goals: maintain, lose 0.5-1 kg/week, gain 0.5 kg/week
STEP 4
Macro Calculator
Calculate macros with TDEE, BMR, 6 split presets, custom sliders, per-meal breakdown, and weekly projection.
- TDEE and BMR calculation
- 5 fitness goals
- 6 macro split presets
STEP 5
Sleep Calculator
Calculate optimal bedtimes and wake times based on 90-minute sleep cycles. Two modes: set wake time or bedtime. SVG sleep cycle timeline showing light, deep, and REM phases. Includes 15-min fall-asleep adjustment, recommended hours by age group, and sleep quality tips.
- two modes: wake-up time or bedtime input
- sleep now mode with current time
- 4-5-6 cycle suggestions with 15-min fall-asleep offset
STEP 6
Water Intake Calculator
Calculate recommended daily water intake based on weight, activity level, and climate. Interactive glass tracker with click-to-fill icons, progress bar, stat cards for target/consumed/remaining, and hydration tips. Supports metric and imperial.
- weight-based daily water calculation
- 4 activity levels with ml adjustments
- climate adjustment: temperate, hot, cold
STEP 7
Heart Rate Zone Calculator
Calculate your heart rate training zones based on age and resting heart rate.
- max heart rate calculation
- 5 training zones
- optional resting heart rate
STEP 8
Body Fat Calculator
Estimate body fat percentage with US Navy method or BMI formula. Visual gauge, category chart, metric and imperial units.
- US Navy body fat method
- BMI-based body fat estimation
- metric and imperial units
How to Use This Workflow
- Start with basic body metrics and note that estimates are population-level.
- Compare calorie and TDEE outputs as planning references only.
- Use sleep, water, and heart-rate tools for general education.
- Consult a qualified professional for personal health decisions.
Search Intent Covered
People usually arrive at this page with a specific job to finish, not to browse a directory. This hub is structured around the searches below and points each task to a working tool.
- bmi calculator
- tdee calculator
- calorie calculator
- sleep calculator
- heart rate zone calculator
Quality Notes
These workflow pages are generated from the same review-public tool list used by the sitemap, homepage, tool sidebars, and command palette. If a tool is policy-sensitive or needs a deeper manual audit during review, it is not promoted here.