Add up to 5 habits you want to keep, then tap the pixel for each day you did it. Every habit gets its own one-year grid (today plus the previous 365 days), like the GitHub contribution chart. It follows the same idea as Habit Pixel and similar habit apps, rebuilt as a browser tool that needs no sign-up. Your current streak, days done this month and this month’s completion rate update instantly. Data is stored only in this browser (localStorage) and never sent anywhere; use “Export JSON” and “Import JSON” to move it to another device. ...
Appliance Electricity Cost Calculator
Want to know what your air conditioner, space heater or gaming PC really adds to the power bill? Enter the appliance’s wattage (printed on its label or power brick), how many hours a day it runs, and the price you pay per kilowatt-hour (check your utility bill; the US average is about 17 cents). Tap a preset to fill in a typical wattage. The result shows the estimated cost per day, month and year, plus the kWh used. Real usage varies with thermostat settings and cycling, so treat this as an estimate. ...
BMI Calculator (US & metric)
Enter your height and weight to get your Body Mass Index (BMI) and the World Health Organization category it falls into. Use the toggle to switch between US units (feet, inches, pounds) and metric (centimeters, kilograms). The tool also shows the weight range that would put you in the “normal” band for your height. BMI is a simple screening estimate for adults: it does not measure body fat, and athletes, older adults, pregnant women and children need different assessments. It is not a medical diagnosis; talk to a doctor about your health. ...
Days Between Dates & Date Add Calculator
Two quick date tools in one. Days between dates: pick a start and end date to see how many days and weeks apart they are, useful for countdowns, deadlines, age in days, or how long since an event. Add days to a date: enter a start date and a number of days (use a negative number to go back) to find the resulting date, handy for “30 days from today” return windows, notice periods or medication schedules. Press “Today” to fill in the current date. Dates are counted by calendar days, ignoring time of day and time zones. ...
Hourly to Salary Converter
Comparing a job that pays by the hour with one that quotes a yearly salary? Enter an hourly rate to see the equivalent weekly, monthly and annual gross pay, or switch to “Salary to hourly” and enter a yearly figure to get the hourly rate. Hours per week defaults to 40 and weeks per year to 52; change these if you work part time, get unpaid time off, or want to account for holidays (for example 50 weeks). All figures are gross, before taxes, benefits and deductions. Overtime, bonuses and tips are not included. ...
Tip Calculator with Bill Split
Enter your bill amount, choose a tip percentage (or type your own), and set how many people are splitting the bill. The calculator instantly shows the tip, the total, and what each person pays. Turn on “Round up per person” if you want everyone to pay a whole-dollar amount with no loose change. Works for restaurants, delivery, taxis, salons, or any situation where you tip. All math runs in your browser; nothing is sent anywhere. ...