UTILITY · AGE
Age calculator
Calculate age in years, months, and days from a birth date and an as-of date.
№ 3Category index
Utility calculators
Browse the live utility calculators for weekday lookups, date shifts, countdowns, business-day counts, timesheet math, clock-in totals, and elapsed-time checks.
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Live Utility calculators
20 live calculators currently grouped in this category.
UTILITY · BIRTHDAY
Birthday calculator
See exact age now, days lived, and how many days remain until the next birthday.
UTILITY · DATE PLAN
Date calculator
Add or subtract years, months, weeks, and days from a starting date with the clamping rule kept visible.
UTILITY · DAY COUNT
Day counter calculator
Count the pure number of days between two dates with an inclusive-or-exclusive end-date rule.
UTILITY · DATE SHIFT
Date add and subtract calculator
Move a date forward or backward by one unit at a time, including clamped month and year shifts.
UTILITY · DATES
Date difference calculator
Measure elapsed days and calendar span between two dates.
UTILITY · WORKDAYS
Business days calculator
Count weekdays between two dates with the inclusion rule kept visible.
UTILITY · TIME
Time duration calculator
Measure elapsed time between two clock times, including overnight spans.
UTILITY · WEEKDAY
Day of week calculator
Find the weekday for any calendar date with the result framed as a pure Gregorian date lookup.
UTILITY · DAY OFFSET
Days from today calculator
Add or subtract a whole number of days from a chosen as-of date and see the resulting calendar date instantly.
UTILITY · COUNTDOWN
Days until date calculator
Count the signed number of whole days between an as-of date and a target date.
UTILITY · CLOCK MATH
Time calculator
Add or subtract hours, minutes, and seconds from a clock time and keep any midnight rollover visible.
UTILITY · TIMESHEET
Hours calculator
Sum up to five work or activity ranges with row-level break deductions and overnight support.
UTILITY · CLOCK FORMAT
Military time converter
Convert a time string between 12-hour and 24-hour formats with AM and PM kept explicit.
UTILITY · TIMER
Countdown timer calculator
Break the gap between two date-times into days, hours, and minutes.
UTILITY · CLOCK-IN
Clock in clock out calculator
Sum up to six clock-in and clock-out rows with unpaid breaks and overnight support.
UTILITY · TIME FORMAT
Decimal to time calculator
Convert decimal hours into an HH:MM:SS duration string.
UTILITY · TIME FORMAT
Time to decimal calculator
Convert HH:MM or HH:MM:SS durations into decimal hours.
UTILITY · TIMESHEET
Time card calculator
Total a seven-day time card into weekly regular and overtime hours.
UTILITY · WORK HOURS
Work hours calculator
Estimate work hours across a date range using workdays per week and holiday deductions.