Offline-first · No dependencies · No tracking

A health data dashboard for BMI, BMR, TDEE, macros & fluids.

A single-file clinical calculator for adult outpatients. Enter a few numbers and read BMI with category, BMR, TDEE, calorie targets, macro split, fluid needs and body composition — recomputed live as you type.

Launch calculator View on GitHub Download for Windows (.exe) Download for Android (.apk)

Free & fully offline — nothing to install. The Android .apk is sideload-only (allow installs from unknown sources).

MIT licensed EN · हिन्दी · ગુજરાતી Works offline
Features

Everything the calculator does, in one file

Every capability below is described in the project's own README. Nothing is generated or padded.

Real-time recalculation

Results update as you type. A sticky results panel sits beside the inputs from 960 px up, so numbers and controls stay in view together.

Saved entries & BMI trend

Entries are stored in localStorage with an optional patient name/ID and timestamp — with a BMI trend chart, filter, load-back and delete-with-undo.

CSV export & import

Move data in and out as CSV — with formula-injection protection — plus print / PDF output and a copy/share summary of the current result.

Trilingual UI

Switch the interface between English, हिन्दी and ગુજરાતી — the same clinical outputs in three languages.

Accessible by design

ARIA radiogroups, a live result region, keyboard navigation, focus-visible states, hover definitions on every metric and a print stylesheet.

Offline & private

No build step, no dependencies, no server and no tracking. The page makes no external requests, and can be added to a phone's home screen.

No dependencies Offline ready Single HTML file Trilingual MIT license Last commit
BMI · WHO + Asia-Pacific BMR · Mifflin–St Jeor TDEE · 5 activity levels Macros · protein / fat / carb / fiber Fluids · mL / L / glasses Body fat · Deurenberg BSA · Mosteller IBW · Devine
How it works

Published formulas, applied transparently

Each output is derived from a named, referenced formula — the same list the README documents.

01

Enter anthropometrics

Age, sex, weight and height — in cm / m / ft+in and kg / lbs. Unit switches preserve the values you entered.

02

Pick an activity level

One of five standard multipliers scales BMR up to TDEE (total daily energy expenditure).

03

Read the dashboard

BMI with category and gauge, energy targets, macro split, fluid needs and body-composition metrics recompute live.

04

Save, export, print

Store entries locally, chart BMI over time, export or import CSV, and print or share a formatted summary.

Basal metabolic rate
BMR = Mifflin–St JeorMifflin & St Jeor, Am J Clin Nutr 1990;51:241–7
Energy expenditure
TDEE = BMR × 1.2 … 1.9Standard activity multipliers
Body mass index
BMI = kg / m²WHO & WHO Asia-Pacific / ICMR cut-offs
Ideal body weight
AdjBW = IBW + 0.25 × (actual − IBW)Devine, Drug Intell Clin Pharm 1974
Body surface area
BSA = √(height × weight / 3600)Mosteller, N Engl J Med 1987;317:1098
Body fat
Deurenberg equationDeurenberg et al., Br J Nutr 1991;65:105–14
Daily fluids
30 mL/kg/day baselineEFSA / IOM general guidance; climate, exercise, fever & breastfeeding adjustments
Waist & waist-to-hip
WHR > 0.90 M / > 0.85 FIDF / WHO Asia-Pacific cut-offs
Demo

A look at the results panel

An illustrative view of the calculator's dashboard-style output. Open the live app for real, interactive results.

Clinical Health Calculator
ENdarkoffline
34 yrs
MaleFemale
172 cm
69 kg
1.21.3751.551.7251.9
84 cm
23.4 BMI · normal
BMR
1592
TDEE
2468
Protein
110 g
Fluids
2.4 L

Try it live. The full calculator — inputs, saved entries, BMI trend chart, CSV export and print — runs in the browser with no install.

Open the demo Download index.html
Get started

Three ways to run it

Nothing to install and nothing to build — pick whichever suits the setting.

OPTION 01

Online

Open the live demo in any modern browser and start entering values right away.

Open the demo →
OPTION 02

Offline

Download index.html and open it locally — fully self-contained, no external requests.

Download index.html →
OPTION 03

On mobile

Open the file or link, then use your browser's "Add to Home Screen" to keep it one tap away.

Read the docs →
FAQ

Common questions

Does it need an internet connection?
No. It is a single self-contained HTML file with no external requests. Download index.html and open it in any modern browser to use it fully offline — and add it to your home screen on mobile.
Which formulas does it use?
BMR uses Mifflin–St Jeor (1990); TDEE applies standard activity multipliers (1.2 / 1.375 / 1.55 / 1.725 / 1.9); BMI uses WHO and WHO Asia-Pacific / ICMR cut-offs; ideal body weight uses Devine (1974); body surface area uses Mosteller (1987); body fat uses Deurenberg (1991); fluids use a 30 mL/kg/day baseline.
Who is it designed for?
Adult outpatients. It includes an adult-only guard, and caution flags for renal / hepatic disease, heart failure, athletes and paediatric patients.
Can I export or print the results?
Yes. Entries can be exported and imported as CSV (with formula-injection protection), printed or saved as PDF, and copied or shared as a formatted text summary.
Where is my data stored?
Saved entries live in your browser's localStorage. There is no server and no tracking — nothing leaves the device.
Is this medical advice?
No. It is a decision-support aid. Results are population estimates, not a diagnosis, and do not replace clinical judgement. Use adjusted weights and clinical context for individual patients.