Free Online Health Tools
5 free health tools. No signup required. Works entirely in your browser.
BMI Calculator
Calculate Body Mass Index with health category, ideal weight range, and recommendations.
PopularBox Breathing
Guided breathing exercises for relaxation, stress relief, and improved focus.
HIIT Timer
Customizable interval training timer with work/rest periods and audio cues.
Calorie & Macro Calculator
Calculate BMR, TDEE, and daily calorie target for weight loss/gain. With BMI and macro split (protein/carbs/fat).
PopularWater Intake Tracker
Track daily water intake with a visual progress ring and 7-day streak chart. Set glass size and daily goals.
About Health Tools on OneTool
OneTool provides 5 free health tools that run entirely in your browser. No account, no email, no subscription. Your data stays on your device.
These tools help with: health calculator free online, BMI calculator India, HIIT workout timer, breathing exercise tool, fitness tracker browser.
All tools are part of the OneTool suite — a free collection of 60+ utilities for finance, productivity, developer tasks, PDF management, and more.