Check BMI, daily calorie needs, ideal weight and fitness targets with simple inputs. These calculators give a quick, honest starting point for health goals — they never store or share your numbers. The first live tool is the BMI Calculator: enter weight and height and it shows your body mass index from the standard formula, the WHO category, and the healthy weight range for your height, with metric and imperial units. Later batches add calorie and macro calculators, ideal-weight ranges, body-fat estimators, water-intake guides and workout timers. Everything runs in your browser, so your weight and measurements stay on your device. These tools are for general information and planning, not medical advice — if a result worries you, talk to a doctor, and each calculator says that on its page. The results are presented with context — what the number means, what the healthy range is, and what to do next — instead of a bare figure. No account is needed, nothing is uploaded, and the tools are free for everyday use.

1 tool live now. Use one below — the rest of this category arrives in later batches.

Live tools

• BMI Calculator

  BMI Calculator with clear results and explanation.

  Open tool →

Tools planned for this category

• Baby Age Calculator

  Baby Age Calculator with clear results and explanation.

• BMR Calculator

  BMR Calculator with clear results and explanation.

• Body Fat Calculator

  Body Fat Calculator with clear results and explanation.

• Breathing Exercise Timer (Box Breathing)

  Breathing Exercise Timer (Box Breathing) with clear results and explanation.

• Caffeine Intake Calculator

  Caffeine Intake Calculator with clear results and explanation.

• Calorie Calculator

  Calorie Calculator with clear results and explanation.

• Calories Burned Calculator

  Calories Burned Calculator with clear results and explanation.

• Child Height Predictor

  Child Height Predictor with clear results and explanation.

• Eye Rest 20-20-20 Timer

  Eye Rest 20-20-20 Timer with clear results and explanation.

• Heart Rate Zone Calculator

  Heart Rate Zone Calculator with clear results and explanation.

• Ideal Weight Calculator

  Ideal Weight Calculator with clear results and explanation.

• Lean Body Mass Calculator

  Lean Body Mass Calculator with clear results and explanation.

• Macro Calculator

  Macro Calculator with clear results and explanation.

• Meal Calorie Counter (Local Food List)

  Meal Calorie Counter (Local Food List) with clear results and explanation.

• One Rep Max Calculator

  One Rep Max Calculator with clear results and explanation.

• Ovulation Calculator

  Ovulation Calculator with clear results and explanation.

• Pace Calculator (Running)

  Pace Calculator (Running) with clear results and explanation.

• Period Tracker Calendar

  Period Tracker Calendar with clear results and explanation.

• Pregnancy Due Date Calculator

  Pregnancy Due Date Calculator with clear results and explanation.

• Protein Intake Calculator

  Protein Intake Calculator with clear results and explanation.

• Sleep Cycle Calculator

  Sleep Cycle Calculator with clear results and explanation.

• Steps to Km Converter

  Steps to Km Converter with clear results and explanation.

• TDEE Calculator

  TDEE Calculator with clear results and explanation.

• Waist-to-Hip Ratio Calculator

  Waist-to-Hip Ratio Calculator with clear results and explanation.

• Water Intake Calculator

  Water Intake Calculator with clear results and explanation.

• Workout Interval (HIIT) Timer

  Workout Interval (HIIT) Timer with clear results and explanation.

About this category

When will these tools be ready to use?

Tools are published in batches, starting with the 40 highest-value tools in Phase 1. Each tool goes live only when it is fully working, tested on mobile, and has its own written guide.

Will my files be uploaded when I use a tool?

No. Every Toolsvine tool runs 100% in your browser. Files, text and images you use in a tool never leave your device.