Week Calculator: Count Weeks Between Dates
Calculate the number of weeks between two dates. Find the ISO week number for any…
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Time to Decimal Calculator: Convert Hours & Minutes
Convert hours, minutes, and seconds into decimal hours (e.g., 8:30 to 8.5). Supports rounding settings…
Time Duration Calculator: Calculate Total Time Elapsed
Calculate total duration from multiple time blocks (start/end times). Perfect for timesheets, tracking work hours,…
Time Difference Calculator: Duration Between Two Times
Calculate the exact time difference between two dates and times. Supports different timezones for start…
Subtract Time Calculator: Minus Hours, Minutes & Seconds
Subtract a duration from a specific time or find the difference between two time durations.…
Sidereal Time Calculator: GMST & Local Sidereal Time
Calculate Greenwich Mean Sidereal Time (GMST) and Local Sidereal Time (LST) for your longitude. Essential…
Reverse Time Calculator: Subtract Duration from Time
Calculate the starting time by subtracting a duration from an ending time. Perfect for planning…
Palindrome Date Finder: Find Symmetric Dates
Find palindrome dates that read the same backwards and forwards (e.g., 12/02/2021). Search ranges and…
Moon Phase Calculator: Today’s Phase & Illumination
Find the current moon phase and illumination percentage for any date. See if the moon…
Month Calculator: Count Months Between Dates
Count the number of full months between two dates. Calculate partial months as fractions and…