BMI Calculator - Online Body Mass Index Tool
Check your Body Mass Index using standard or metric units. Get a health category analysis instantly. Educational purpose only; data stays private.
UD5 Toolkit
Answer a few quick questions to check if you may be eligible to donate blood.
Check your Body Mass Index using standard or metric units. Get a health category analysis instantly. Educational purpose only; data stays private.
Measure your waist‑to‑hip ratio and learn about associated health risks. WHR interpretation. Educational only.
Enter and track key body circumferences over time. See inch/centimeter changes and chart progress. Local storage.
Calculate BMI for children and teens (ages 2‑19) and see the percentile based on CDC growth charts. Educational only.
Commit to 30 days of gratitude. Write 3 things each day, see progress. Data stays local. Mood boost habit.
Estimate meters of thread needed for a design based on stitch count. Plan your project.
Determine the minimum sample size needed for a survey or A/B test with a given confidence level and margin of error.
Estimate body fat percentage using the US Navy circumference method or BMI-based formula. Private and instant, all data stays on your device.
Create a passkey and authenticate using the Web Authentication API. Supports platform authenticators (TouchID, FaceID). No server.
Create a printable bingo card filled with self‑care activities. Relax, exercise, hydrate. Tick them off.
Calculate infant weight, length, and head circumference percentiles using WHO and CDC reference data. Visual growth chart and interpretation for parents.
Approximate monthly child support obligation based on both parents incomes and number of children. Uses simplified model for educational reference. Not legal advice.
Plot your child's height and weight on WHO growth charts over time. Data saved locally for privacy. Visualise growth trajectory.
Select your average daily meals and habits to see how much virtual water you consume. Environmental awareness tool.
Write a private gratitude entry guided by daily reflective prompts. All entries stored only in your browser with optional export as text file. No account needed.
Enter an API URL and quickly check its HTTP status code and response time. See response headers and body. Browser fetch.
Write a self-contract with a goal and reward/penalty. Sign digitally, save as image. Stay accountable.
Compare options two at a time and get a final ranking. Systematic way to choose a vacation spot or project.
Select a state and year to see all public holidays. Works offline with built-in data. Plan your long weekends. Simple reference tool.
See your current notification permission status. Request or reset it. Test browser notification behavior.
Select month and get a to‑do list (clean gutters, check weatherstripping). Local storage, printable.
Estimate calories burned for various activities like running, cycling, swimming based on duration and body weight. Informational and motivational.
Enter blanket dimensions and square size to know how many granny squares to make. Layout preview.
Enter wallet size and get the exact length of duct tape strips needed to build a sheet. DIY crafting.
A large, simple button to count anything. Plus / minus, reset, and save count to localStorage. Works offline.
Enter your height, knot type (Four‑in‑Hand, Windsor) and collar to predict ideal tie length. Avoid too short or long.
A digital sticker board where kids can place virtual stickers for completed chores or goals. Encourages positive behavior with no paper waste.
Click to receive a random positive affirmation. Save favorites locally. A simple tool to boost your mood and mindset.
Answer a few questions about travel, diet, and energy use to estimate your carbon footprint. Awareness tool.
Enter your bird species and weight to find the correct harness size. Visual adjustment guide.