Lifestyle

Calculate exact age in years, months, days, hours, and minutes from a birth date.

Three modes: X% of Y, X is what % of Y, % change from X to Y. Discounts, taxes, grades, growth rates.

Calculate cumulative GPA on the US 4.0 scale. Add courses with grade and credit hours, get weighted average.

Convert length, weight, temperature, volume, and speed between metric and imperial units.

Calculate years, months, days, weeks between two dates. Handles leap years and short months correctly.

Count words, characters (with/without spaces), sentences, paragraphs. Live updates. Tweet-length tracker built in.

Estimate reading and speaking time from text. Adjustable WPM for different audiences.

One screen for all random picks: dice roll, coin flip, random number range, pick from a list.

Expression-based scientific calculator. Trig, log, exp, factorial, constants. Keyboard-friendly.

Paste a list of numbers, get mean, median, mode, range, variance, standard deviation, quartiles.

What do I need on the final? Given current grade + final weight + target grade, calculate the required score.

Sum daily work hours from clock-in/clock-out times, subtract unpaid breaks. Weekly total + pay.

Solve a triangle: three sides → angles + area (Heron). Pythagorean check for right triangles.

Convert shoe sizes across US, EU, UK, and JP (cm). Men, women, kids. Approximate — brands vary.

Flesch Reading Ease + Flesch-Kincaid Grade Level + Gunning Fog. English text only.

25-minute focus blocks with 5-minute short breaks and 15-minute long breaks. Audio cue via Web Audio oscillator.