UD5 Toolkit
Calorie Burn by Activity - Online Walking Running Cycling Estimator
Estimate calories burned during common exercises using MET values. Input weight and duration. Compare activities. Educational, not medical advice.
Health & Fitness Calculators
40+ toolsBlood Alcohol Content Estimator - Online BAC Calculator
Estimate BAC based on gender, weight, drinks consumed, and time. Uses Widmark formula. Educational tool, never encourage drunk driving. Local only.
Pregnancy Weight Gain Tracker - Online Weekly Chart by BMI
Plot weekly weight gain against recommended ranges based on pre-pregnancy BMI. IOM guidelines displayed. Data stored in localStorage.
Eye Prescription Converter - Glasses to Contact Lens Rx Tool
Approximate conversion from eyeglass prescription to contact lens power. Uses vertex distance formula. For educational purposes only, consult your optometrist.
Blood Donation Eligibility Checker - Online Quick Questionnaire
Answer a short questionnaire based on common deferral criteria (travel, medication, tattoos) to see if you may be eligible to donate blood. Educational only.
DIY Electrolyte Powder Calculator – Online Sodium Potassium Glucose Ratio
Create your own oral rehydration solution by mixing salt, potassium, and sugar to WHO formula. Convert to teaspoon amounts.
Shoe Wear Pattern Diagnosis – Online Pronation & Gait Guide
Compare your worn sole pattern with reference images to determine pronation type and get shoe recommendations.
Sunburn Risk Timer - Online UV Index to Safe Exposure
Enter skin type and UV index to estimate time to sunburn. Visual countdown reminder to reapply sunscreen or seek shade. Educational only.
Positive Affirmation Generator - Online Daily Inspiration Card
Click to receive a random positive affirmation. Save favorites locally. A simple tool to boost your mood and mindset.
Yoga Pose Randomizer - Online Daily Practice Sequence Builder
Generate a random sequence of yoga poses with images and descriptions. Choose difficulty and duration. Build a home practice routine. Local only.
Eye Strain Relief Timer - Online 20-20-20 Rule Reminder
Timer that reminds you to look at something 20 feet away for 20 seconds every 20 minutes. Customizable intervals and subtle sound/visual alerts.
Posture Reminder - Online Sit Straight Alert & Timer
Set recurring audio/visual reminders to check and correct sitting posture. Adjustable interval and notification style. Helps reduce back pain from desk work.
Gratitude Journal with Daily Prompts - Online Private Diary
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.
Sobriety Counter & Milestones - Online Recovery Tracker
Track days of sobriety with a motivational counter and milestone celebrations. Set quit date and see time elapsed in days, hours, minutes. Private & local.
Iron Absorption Optimizer – Online Timing & Food Pairing
Schedule your iron supplement away from inhibitors (coffee, calcium). Visual reminder and log.
Injection Site Rotation Calendar – Online Abdomen, Thigh, Arm
Plan insulin or other injection sites with a visual body map and date log. Prevent lipohypertrophy.
Supplement Half‑Life Reference – Online Vitamin D, B12 Chart
Reference for how long common supplements stay in the body. Inform taking frequency.
Stretch Routine Builder – Online Desk & Sports Flexibility
Pick target areas (neck, back, legs) and generate a 5‑min stretch routine with illustrated steps. Local.
Online Hearing Test – Frequency Pitch Perception
Play pure tones at various frequencies to estimate your hearing range. Simple and educational.
White Noise Machine - Online Sleep & Focus Sound Generator
Generate continuous white, pink, or brown noise for sleep or concentration. Adjustable volume with offline support via Web Audio API. No downloads needed.
Pregnancy Due Date Estimator - Online LMP & Cycle Length Tool
Estimate due date from last menstrual period or conception date. Uses Naegele's rule and shows week-by-week milestones. Local calculator for informational use.
Pregnancy Weeks to Months Converter - Online Trimester Guide
Convert pregnancy weeks into months and trimesters. Simple reference table with baby size comparisons. Informational only.
Breathing Exercise Timer - Online Box Breathing & 4-7-8 Guide
Guided breathing exercises with animated circle for inhale/hold/exhale. Includes box breathing, 4-7-8, and resonant breathing patterns. Customizable intervals.
Symptom Diary – Online Record Daily Health Changes
Rate symptoms severity daily and add notes. Visual pain map. Export for doctor visit. Private local storage.
Family Medicine Log – Online Record Dosage & Schedule
Log which family member takes which medicine and when. Reminders for next dose. Data stays local.
Breathing Exercise Timer - Online Inhale Hold Exhale Visual Guide
Animated circle guides your breathing: breathe in, hold, breathe out. Customizable ratios (e.g., 4-7-8). Soothing colors, optional bell sound. Purely local.
Ideal Weight Range Calculator - Online Hamwi, Devine & Robinson Methods
Find your healthy weight range using multiple medical formulas (Hamwi, Devine, Robinson, Miller). Frame size adjustment included. Instant local computation.
Snellen Eye Chart – Online Visual Acuity Test Simulation
Display a Snellen chart on screen and mark distance for a fun self-test. Not a replacement for professional exam.
Daily Mood Tracker - Online Emoji Journal & Chart
Track daily mood with emoji selection and optional notes. See weekly/monthly mood trends in a color-coded chart. All data stored privately in localStorage.
Menstrual Cycle Logger - Online Private Period Tracker
Log period start dates and cycle length locally. Predict next period and fertile window. Data stays in your browser's storage, never uploaded. Private by design.
Sleep Debt Tracker - Online Cumulative Sleep Loss Calculator
Log daily sleep to see cumulative sleep debt or surplus over weeks. Visualizes chronic sleep loss trends. Stores data locally in your browser only.
Body Fat Percentage Estimator - Online US Navy & Covert Bailey Method
Estimate body fat percentage using neck, waist, hip (if female) measurements. Supports US Navy, Covert Bailey, and 3-site skinfold methods. No data sent to server.
Ovulation & Fertility Window Calculator - Online Cycle Tracker
Estimate ovulation day and fertility window from last menstrual period. Displays probable conception dates. Informational only; processes locally in browser.
Calorie Deficit Planner - Online Weight Loss Timeline Tool
Set a target weight and see estimated daily calorie deficit needed. Computes safe timeline based on 500-1000 kcal deficit. Includes BMR & TDEE estimation. Fully local.
Daily Water Intake Calculator - Online Hydration Goal by Activity
Compute personalized daily water intake based on weight, climate, and exercise intensity. Converts to common cups/ounces. Purely local with no tracking.
Blood Pressure Category Checker - Online AHA & ESC Guideline Tool
Interpret your blood pressure reading based on American Heart Association and European Society of Cardiology categories. Visual gauge with actionable health insights.
Running Pace Calculator - Online Min/Mile & Min/Km Converter
Convert between pace (min/km, min/mile) and speed (km/h, mph). Predict race finish times for 5k, 10k, half and full marathon based on a recent split. Works offline.
Caffeine Half‑Life Tracker - Online Blood Level Visualizer
Visualize how caffeine decays in your body over time. Enter intake amount and see remaining caffeine at bedtime to optimize sleep. Uses standard 5-hour half-life.
One Rep Max (1RM) Calculator - Online Strength Trainer Tool
Calculate your one-rep max using Epley, Brzycki, Lombardi or O'Conner formulas. Predict maximum lifting capacity and plan progressive overload. 100% local processing.
Baby Growth Percentile Calculator - Online WHO & CDC Charts
Calculate infant weight, length, and head circumference percentiles using WHO and CDC reference data. Visual growth chart and interpretation for parents.