Toolset
Pick a duration workflow
Time Duration CalculatorCompare start and end times with millisecond precision plus auto-converted seconds, minutes, and hours.Exam Extra Time CalculatorAdd an approved extra-time percentage to an exam length and see the adjusted finish time.Arrival Time CalculatorCalculate arrival time from departure, distance, speed, planned stops, and a practical buffer.Watch Time CalculatorEstimate views needed to reach watch-hour targets using average view duration inputs.Sleep Time CalculatorCompare bedtime or wake-up examples using fixed 90-minute planning intervals and an adjustable delay.Age CalculatorReveal age in years, months, weeks, and days and preview the countdown to the next birthday.Date Duration CalculatorMeasure days, weeks, months, or years between any two dates with leap-year awareness built in.Date of Birth CalculatorWork backward from a reported age and reference date to estimate a most likely date of birth and a possible range.Time Duration with BreaksSubtract meal breaks or compliance pauses to expose net working time without spreadsheets.

Duration Calculators

Duration Calculators

Use this duration collection when you need the exact elapsed time between two readings, not a rough calendar guess. Every calculator handles seconds through years, optional pauses, arrival-time planning, sleep-cycle planning, and scenarios like payroll audits or personal milestones.

Answer how long with proof

Resolve questions like "How many hours and minutes passed between Jul 14, 2023 7:32 AM and Aug 2, 2023 5:45 PM?" without spreadsheets.

Prepare exam rooms by asking "If a 90-minute test starts at 9:00 AM with 25% extra time, when should it finish?" and copy the adjusted schedule.

Plan trips by asking "If I leave at 9:00 AM, travel 180 miles at 60 mph, stop 15 minutes, and add 10 minutes of buffer, when will I arrive?".

Compare a fixed-interval bedtime model by asking "If I need to wake up at 6:30 AM, what times are five or six 90-minute intervals earlier?".

Show net working time for requests such as "What is the duration of this shift after I remove a 45-minute lunch and two 15-minute breaks?".

Answer family and HR requests like "Exactly how old is someone born on Oct 9, 1990 today?" with years, months, weeks, and days.

Last updated: September 16, 2026