General
Roman Numeral Calculator
Convert standard integers (1 to 3,999) to Roman numerals and parse Roman numerals into Arabic decimal numbers with full subtraction rules.
Blog Archive
Archives: Calculators
Explore all editorial articles, guides, and tutorials filed under "Archives: Calculators".
General
Chronological Age Calculator
Calculate exact chronological age in years, months, and days for psychological assessments, medical records, and school grade placement.
General
Reading Time Calculator
Estimate reading duration in minutes and hours based on total word count and reading speed in words per minute (WPM).
General
Minutes to Hours Calculator
Convert total minutes (e.g. 275 minutes) into hours, remaining minutes, and decimal hours.
General
Hours and Minutes Calculator
Add and subtract time durations formatted in hours and minutes with base-60 sexagesimal handling.
General
Decimal to Time Calculator
Convert decimal hours (e.g. 7.75 hours) into hours, minutes, and seconds for timesheet payroll and scheduling.
General
Military Time Calculator
Convert 12-hour AM/PM standard clock time to 24-hour military time, with NATO phonetic pronunciations and military time charts.
General
Time Zone Calculator
Convert local time across worldwide time zones with UTC offset differences and Daylight Saving Time (DST) rules.
General
Day of the Week Calculator
Find out what day of the week (Monday through Sunday) you were born on or any past or future historical date.
General
Day Counter
Count the exact number of calendar days, business weekdays (Monday through Friday), and weekends between two dates.