Free Online Health Calculators — BMI, Calories & More
Free health and fitness calculators that run entirely in your browser: check your BMI and weight category, estimate your maintenance calories, and plan from there. No signup — and your health data never leaves your device.
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Maintenance Calorie Calculator
Highly functional, beautifully designed calorie calculator to determine your daily maintenance calories, BMR, and macro targets for weight loss or gain.
- Mifflin-St Jeor Equation
- Macro breakdowns
- Weight loss/gain goals
BMI Calculator
Calculate your Body Mass Index in metric or imperial units, see your weight category, and find your healthy weight range.
- Metric & imperial units
- WHO/CDC weight categories
- Healthy weight range for your height
About Health Tools
Digital ToolPad's health tools are 2 free, privacy-first utilities that run entirely in your browser. This collection includes Maintenance Calorie Calculator and BMI Calculator. There's no signup and nothing to install — open any tool and start in seconds, on Windows, macOS, Linux, or your phone.
Every tool processes your data locally using modern web technology, so your files and text never leave your device — zero uploads, zero tracking. You can confirm it yourself by opening your browser's Network tab while you work, which makes these health tools a safe choice for sensitive or confidential content.
Private by design
Your files and text are processed on your device — nothing is uploaded. Verify it in your browser's Network tab.
Free, no signup
Every tool works instantly — no account, no trial limits, no credit card.
Works everywhere
Windows, macOS, Linux, or your phone — anywhere a modern browser runs.
Related collections
Keep exploring — these collections pair well with health tools.
Frequently asked questions
Is my health data private when I use these calculators?
Yes — completely. Your height, weight, and other inputs are processed on your device and never transmitted, stored, or logged. That matters more for health data than for almost anything else you type into a website.
Are these calculators a substitute for medical advice?
No. They use standard published formulas (like WHO BMI categories and the Mifflin-St Jeor equation) and are great for orientation, but they can't account for your individual health context. Talk to a healthcare professional about what the numbers mean for you.
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Bookmark this page and browse the full Digital ToolPad library — 82+ privacy-first tools for developers, creators, and everyday tasks, all running 100% in your browser.
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