Calculators
Quick calculators for everyday computation.
Calculators directory
Unix Timestamp Converter
Epoch ↔ ISO/UTC/local, with live clock and 16 timezones.
Typing Speed Test
Live char-by-char WPM, accuracy and 30-run history.
CPS Test (Clicks Per Second)
Live CPS counter with 1/5/10/30/60 s windows and history.
Drag Click Test
Counts clicks while the cursor is moving — honest browser approximation.
Spacebar Counter
Press Space as fast as you can — auto-repeats ignored.
Reaction Time Test
Click when the screen turns green — millisecond accuracy.
Stopwatch
Start / stop / lap / reset, sub-millisecond accurate, CSV export.
Alarm Clock
Multiple alarms, four WebAudio tones, custom days, snooze.
Pomodoro Timer
Focus / short / long break cycles with chime and notifications.
Age Difference Calculator
Precise calendar-correct difference with live update and totals.
Business Days Calculator
Working days between dates with custom weekends and holidays.
Leap Year Checker
Yes/no answer plus the Gregorian rule, ranges and Feb 29 helper.
Sunrise & Sunset Time
NOAA solar position offline; civil / nautical / astronomical twilights.
World Clock
Live multi-city clock with day/night and IANA timezones.
EMI Calculator
Standard EMI plus a full amortisation schedule and CSV export.
Loan Calculator
Compare up to 4 scenarios — frequency, rate, term, prepayment.
GST / VAT Calculator
Add or remove tax with 18 region presets and 23 currencies.
Tip Calculator
Tip percentage, bill split and round-the-total options.
Fuel Cost Calculator
km/L, L/100km, mpg US/UK — per-trip, weekly, monthly, yearly cost.
BMI Calculator
WHO BMI in metric or imperial, with ideal-weight range and honest caveats.
Calorie Calculator
Mifflin–St Jeor BMR, TDEE, goal target and macro split.
Water Intake Calculator
30 ml/kg + activity + climate + pregnancy, with a daily schedule.
Love Compatibility Calculator
Deterministic FLAMES + letter overlap, openly "for fun" only.
Zodiac Sign Finder
Western sun sign + Chinese animal with proper New Year boundary.