Your Time, Instantly Calculated.
Every Second Counts—Make Yours Countable.
Welcome to TimeCalculator.day — your free online time calculator. Whether you need to add or subtract time, calculate the duration between two moments, or count days between dates with our date calculator, track work hours with a time card calculator, find out how old am I with our age calculator, or plan your next project deadline, our tools handle it all with precision. No sign-up, no ads, just accurate results in seconds.
Our Time Calculation Tools
Time Addition & Subtraction Calculator
Add or subtract hours, minutes, and seconds from a given time.
Add or subtract hours, minutes, and seconds from any start time with ease.
Time Card Calculator
FLSA-compliant time card calculator for accurate work hours, overtime pay, and total compensation.
Calculate work hours, overtime, and payroll with lunch breaks.
Time Duration Calculator
Calculate the duration between two times, supporting different time zones and DST.
Find the exact duration between two times or dates.
Hours Calculator
Find how many hours between two times — 9:00 AM to 5:00 PM is 8 hours, with overnight shifts and breaks handled automatically.
Calculate hours between two times with lunch breaks.
Date Calculator
Calculate the number of days, months, and years between two dates.
Find days between dates, or add or subtract days from any date.
Age Calculator
Calculate exact age from birth date.
Find your exact age, total days alive and next birthday countdown.
Chronological Age Calculator
Calculate exact age in years, months and days for assessments.
Report-ready Y;M;D format, exact test-date handling and corrected age for premature infants.
Time to Decimal Calculator
Convert HH:MM:SS to decimal hours, minutes and seconds — and back.
Timesheet, payroll and hourly billing conversions. 7:45 = 7.75 decimal hours.
Time and a Half Calculator
Calculate overtime pay at 1.5x, 2x and 3x rates instantly.
Overtime rate and weekly pay with FLSA rules. $20/hr = $30.00/hr at time and a half.
Hourly to Salary Calculator
Convert your hourly wage to an annual salary — and back — instantly.
Annual, monthly, bi-weekly, weekly and daily pay. $25/hr = $52,000 a year.
Work Hours Calculator
Add up your weekly hours worked from clock-in and clock-out times with lunch breaks.
Total weekly hours, decimal hours and overtime past 40. 9-to-5 with lunch = 7.5 hours.
Time From Now Calculator
Find out what time it will be hours, minutes or seconds from now — with a live clock.
8 hours from now, 72 hours from now, or 30 minutes ago. Instant answers, 12/24-hour.
Timesheet Calculator
Calculate total work hours and pay from a timesheet with breaks.
Time Zone Converter
Convert time between different time zones around the world.
DST handled automatically. New York 12:00 PM → London 5:00 PM. Live world clock included.
Speed Distance Time Calculator
Calculate speed, distance or time — enter any two values.
60 mph for 120 miles takes 2 hours. mph, km/h, m/s and knots included.
Daylight Savings Time Clock Change
When do clocks change? DST dates, times and countdown.
US clocks change on the second Sunday of March and the first Sunday of November — see the exact dates.
Time Unit Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years.
90 minutes is 1.5 hours — convert any time unit across 13 units with one click.
Elapsed Time Calculator
Find the time between two clock times — or how long since a start time to now.
Overnight shifts handled automatically — leave the end time blank to count up live.
Average Time Calculator
Find the mean of multiple durations or times — total, count, shortest and longest included.
Average 3 runs or 100 tasks instantly — works over 24 hours with live results.
Speaking Time Calculator
Estimate how long it takes to speak any text — paste your script and set your speaking rate.
Includes a Reading aloud preset — words to time and time to words in one tool.
Countdown Timer
Create custom countdown timers for events.
Stopwatch
High precision timing tool.
Pomodoro Timer
Time management tool to boost productivity.
Meeting Planner
Schedule meetings across multiple time zones.
Time Format Converter
Convert between different time formats.
Business Days Calculator
Calculate dates excluding weekends and holidays.
Time Splitter
Divide time periods into equal segments.
World Clock
View current time in major cities worldwide.
Time Tracker
Track time spent on tasks and projects efficiently.
Shift Schedule Calculator
Calculate shift schedules and rotation patterns.
Frequently Asked Questions
What is a time calculator used for?
A time calculator simplifies adding, subtracting, converting, and calculating durations between hours, minutes, and seconds. Our free time calculator handles all these tasks instantly.
How do I calculate work hours?
Use a work hours calculator to track clock-in/out times and subtract breaks, then compute overtime past 40 hours. Our time card calculator handles FLSA-compliant payroll with hourly rates, overtime thresholds, and time rounding automatically. Or convert an hourly rate to an annual salary with the Hourly to Salary Calculator.
How do I calculate the days between two dates?
Use our date calculator to count the exact number of days, months, and years between two dates — or add or subtract days from any date. All calculations run locally in your browser.
How do I calculate a time card with lunch break?
Enter clock-in, clock-out times, and break duration in the time card calculator. The tool automatically subtracts the break from total hours and calculates regular pay, overtime, and total compensation.
What is 7:45 in decimal hours?
7:45 is 7.75 decimal hours — 7 hours plus 45 ÷ 60 = 0.75. Use our time to decimal calculator to convert any HH:MM:SS total for timesheets and payroll.
How do I convert time to decimal for payroll?
Convert each timesheet entry to decimal hours before multiplying by the hourly rate — 8 hours 45 minutes becomes 8.75, not 8.45. The time to decimal calculator does this instantly with 2, 3 or 4 decimal places.
How to add hours and minutes?
To add up time durations like 8h 30m + 6h 15m, use the hours calculator's Add Time Durations tab. With the time addition calculator, select a start date/time, choose the unit, enter the value, and click Add. The result updates instantly. Wondering what time it will be from now? Try the Time From Now Calculator.
What is a time and a half calculator?
A time and a half calculator shows your overtime rate (1.5×) and overtime pay instantly — $20/hour becomes $30.00/hr, and 10 overtime hours earn $300. Our time and a half calculator handles 1.5×, 2× and 3× rates plus your total weekly pay. For a full time card with clock-in/out times, the time card calculator applies overtime automatically.
How much is $20 an hour a year?
$20 an hour at 40 hours a week for 52 weeks is $41,600 a year before taxes — $800 a week. The hourly to salary calculator converts any rate to annual, monthly, bi-weekly, weekly and daily pay.
How much is $25 an hour a year?
$25 an hour at 40 hours a week for 52 weeks is $52,000 a year before taxes — about $4,333.33 a month. Flip it around with the salary to hourly calculator to convert an annual offer back to an hourly rate.
How old am I?
Use the age calculator to find your exact age in years, months and days from your date of birth — with total days alive and your next birthday countdown.
How many days old am I?
The age calculator shows exactly how many days you have been alive — the day you were born counts as day 0, so the day after your birth you are 1 day old.
How many hours did I work this week?
Add up every clock-in and clock-out time, then subtract unpaid breaks. The work hours calculator totals your week in hours and minutes, shows decimal hours, and splits out overtime past 40 hours automatically.
How many hours is 9 to 5?
A 9:00 AM to 5:00 PM day is 8 hours; with a 30-minute lunch it is 7.5 hours worked. See the shift chart in our work hours calculator for standard, early, late, night and 10-hour schedules. Just need the hours between two single times? Use the hours calculator.
What time is it in New York right now?
See the live New York clock and convert any time with our Time Zone Converter — it shows the current time in New York, London, Tokyo and 8 more cities, with DST handled automatically.
What is the time difference between New York and Tokyo?
New York is 14 hours behind Tokyo during US standard time (12:00 PM in New York is 2:00 AM the next day in Tokyo) and 13 hours during daylight time. Check any pair of cities with the Time Zone Converter.
How do I calculate travel time?
Travel time is distance divided by speed. Driving 120 miles at 60 mph takes 120 ÷ 60 = 2 hours. The Speed Distance Time Calculator shows the answer as HH:MM:SS plus total hours, minutes and seconds.
How fast am I going?
Speed is distance divided by time. Cover 100 km in 1 hour 15 minutes and you averaged 100 ÷ 1.25 = 80 km/h. The Speed Distance Time Calculator converts your result to km/h, mph, m/s and knots at once.
How long does it take to drive 120 miles at 60 mph?
It takes 2 hours — time is distance ÷ speed, so 120 ÷ 60 = 2. Enter 120 miles and 60 mph in the Speed Distance Time Calculator to see it as 02:00:00.
How far can you travel at 60 mph in 2 hours?
You travel 120 miles — distance is speed × time, so 60 × 2 = 120 miles, about 193.12 km. The Speed Distance Time Calculator works out any of the three from the other two.
When do the clocks change?
In the US, clocks spring forward on the second Sunday of March (2:00 AM → 3:00 AM) and fall back on the first Sunday of November (2:00 AM → 1:00 AM). The UK changes on the last Sunday of March and October. See the exact dates for every year up to ten years ahead on the Daylight Savings Time Clock Change page.
Does Arizona change clocks for daylight saving time?
No — Arizona does not observe daylight saving time, except for the Navajo Nation in the northeast. Hawaii skips DST too. Find the full state list on the Daylight Savings Time Clock Change page, or convert times with the Time Zone Converter.
Are we in daylight saving time right now?
It depends on the date and region: in the US, DST runs from the second Sunday of March to the first Sunday of November. The Daylight Savings Time Clock Change page shows the live status and a countdown to the next change.
What is chronological age?
Chronological age is the exact time that has passed since birth, measured in years, months and days. For educational assessments (CELF-5, WISC-V and more), the chronological age calculator computes it on the exact test date and outputs the report-ready Y;M;D format.
What is corrected age for premature infants?
Corrected (adjusted) age subtracts the weeks born early from chronological age — for a baby born at 32 weeks, subtract 8 weeks. The chronological age calculator takes the gestational age at birth and shows the corrected age automatically for premature births (GA below 37 weeks).
How do I calculate chronological age by hand?
Use the borrowing method: subtract days, then months, then years — when the test day is smaller than the birth day, borrow the actual days of the previous month. The chronological age calculator shows the step-by-step calculation in its audit trail so you can verify your manual work.
How do I convert time units?
Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years with the Time Unit Converter — 90 minutes is 1.5 hours, and 2 weeks is 14 days. All 13 units update instantly from a single value.
How many seconds are in an hour?
There are 3,600 seconds in 1 hour (60 minutes × 60 seconds). Convert any amount instantly with the Time Unit Converter.
How many minutes are in a day?
There are 1,440 minutes in 1 day (24 hours × 60 minutes). Use the Time Unit Converter to convert between any time units.
How much time has passed?
Enter your start time in the Elapsed Time Calculator and leave the end time blank — it counts up to the current time live, so you always see how long it has been since you started. Overnight spans are handled automatically.
How do I calculate the average time?
Add up all the times, then divide by how many there are — Average Time = Total Time ÷ Number of Times. The Average Time Calculator averages multiple durations instantly, with total, entry count, shortest and longest included.
How many words is a 5-minute speech?
About 650-750 words — 650 at 130 WPM, 750 at the average 150 WPM, or 900 at a fast 180 WPM. Enter your target time in the Speaking Time Calculator's Time to Words tab for your exact word budget.
How long does it take to speak 1,000 words?
About 6 minutes 40 seconds at 150 WPM (1,000 ÷ 150 = 6.67 minutes). Paste your script into the Speaking Time Calculator and set your rate to see your exact speaking time.
Time Facts You Might Not Know
Leap Seconds Keep Our Clocks in Sync
Occasionally, an extra second is added to Coordinated Universal Time (UTC) to account for Earth's slowing rotation. This adjustment ensures our atomic clocks stay aligned with astronomical time.
Not All Time Zones Are One Hour Apart
Some time zones have 30 or 45-minute offsets, like India (UTC+5:30) and Nepal (UTC+5:45). This reflects historical and geographical preferences rather than strict longitudinal lines. This is why a reliable Time Zone Converter is essential for scheduling international meetings without confusion.
Date Calculations Must Account for Month Lengths
Adding months to a date isn't as simple as adding days—different months have 28, 30, or 31 days. Accurate tools automatically adjust for these variations.
Daylight Saving Time Isn't Global
Only about 40% of countries observe Daylight Saving Time. Many equatorial regions skip it since daylight hours change little throughout the year.
The Concept of “Week” Is Ancient
The 7-day week has been used for millennia, originating from ancient Babylonian calendar systems. It's now the global standard for organizing work and rest.
Time Zone Abbreviations Aren't Always Unique
“CST” can refer to China Standard Time, Central Standard Time (US), or Cuba Standard Time. Always check the full context or city when scheduling internationally.
Calculating Across Time Zones Avoids Ambiguity
When scheduling global meetings, always specify the time zone (e.g., “2 PM GMT”) instead of local time to prevent confusion across regions.
Time Calculation Tools Prevent Human Error
Automated calculators reduce mistakes in date and time arithmetic, especially when dealing with leap years, time zones, and varying month lengths.
How to Calculate Time Duration Accurately?
Calculating the exact duration between two times requires accounting for hours and minutes. Our Time Duration Calculator eliminates errors when tracking work shifts or project time.
Why Use a Time Card Calculator?
For hourly employees and freelancers, a Time Card Calculator ensures accurate payroll by converting hours:minutes into decimal hours for billing (e.g., 7:30 becomes 7.5 hours).
What is Time and a Half? How to Calculate It.
Time and a half is a common overtime rate (1.5x regular pay). The formula is: (Hourly Wage) × 1.5 × (Overtime Hours). Use our calculator to get it right every time.
Beyond Hours and Minutes: What Can a Time Calculator Do?
Modern time calculators handle more than basic math. They can calculate the difference between two dates, account for time zones in meeting planning, and even convert between time formats (12-hour vs. 24-hour). This makes them indispensable tools for project managers, travelers, and freelancers alike.
What time is 8 hours from now?
If it is 10:00 AM now, 8 hours from now is 6:00 PM the same day — and past midnight it rolls to the next date. The Time From Now Calculator shows the exact time and date instantly, with a live clock.