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Time and Date Calculators: Calendar Creators, Time Duration and Math, Timers, Business Days, Pregnancy and More

Calculators designed to save you «time» finding and calculating dates and times.

This online calculator collection will eventually include all of the most popular calendar, time and date calculators. These should include calculators for calculating date differences, due dates, conception dates, business days, day of the week, as well as various calendar, timer, and countdown creators.

the title of a calculator to go to the calculator.

in the plus (+) icon to see a summary of what the calculator does.

in a the minus (-) icon to hide the summary.

the Expand All Calculator Summaries button to open all summaries at once. again to collapse all summaries.

• Date & Time Calculators Current Date & Time Calculators Current Date & Time Calculator Menu Current Date & Time Calculator Menu 17

Add Hours Minutes Calculator

The calculator also converts minutes to decimal numbers and provides a printer-friendly report. The Learn section includes:

Age Calculator

The calculator will also translate that age into how old you are in terms of months, weeks, days, hours, minutes, and seconds. Plus, the calculator will tell you how many days until your next birthday, and on what day of the week it will fall on. And finally, the calculator can even tell you on what date you will turn a certain age. The Bonus section includes the following bonus calculators:

Baby Due Date Calculator

Plus, the calculator also generates dates for each of the 40-weeks of your pregnancy, which means it can also be used to calculate how many weeks pregnant you might be. The Learn tab includes:

• How to calculate due date.
• 40 Week Calculator.
• Due Date Calculator based on weeks and days.

Business Day Calculator

You can also calculate a past or present date by adding or subtracting a specified number of working days to or from a starting date.

Includes built-in holiday date calculations to exclude holidays of your choosing. Plus you can even choose which days of the week you want the calculator to count — which opens up the calculator for other interesting uses! The Chart section includes a Business Days from Today Chart showing dates for common searches between 1 and 90 business days.

Chronological Age Calculator

Calculate a person’s age in years, months, and days by subtracting the person’s date of birth from a given test date.

Plus, the calculator also gives the result rounded to the nearest month, as well as the age in total number of months. The calculator also shows its work so you can learn how to perform date subtractions without having to use a calculator. The Learn section includes:

Count Up Timer

Count up the years, months, weeks, days, hours, minutes, and seconds since the date and time of a special occasion.

Great for tracking special occasions such as sobriety, clean time, quit smoking, and more. Plus, if the past event resulted in saving or earning money each hour, day, week, or month, the calculator will even count up the money you have saved or earned!

Countdown Calculator

Count down the years, months, weeks, days, hours, minutes, and seconds until the date and time of a special occasion.

Great for anniversaries, birthdays, due dates, graduations, retirements, weddings, and the like. Plus, you can even save multiple events and switch between saved timers on your next visit!

Date Difference Calculator

Calculate the number of days between two dates, plus convert those number of days to their equivalent years, months, weeks, hours, minutes, and seconds.

The calculator can be used to calculate elapsed time from a past date and to calculate time between a past or present date and a future date. Many cool uses! The Bonus section includes:

Date Time Calculator

Includes optional starting and ending time in hours, minutes, and seconds. Result also includes the day of the week for the calculated date. Many interesting uses! The Bonus section includes:

• Hours From Now Calculator
• Hours Ago Calculator
• Days From Now Calculator
• Days Ago Calculator

Day of the Week Calculator

Learn whether the date you enter is a Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday.

• What day of the week was I born on?
• What day will my birthday be on?
• What day will our anniversary fall on?

Day of Year Calculator

Plus the calculator will tell you how many days are in the year how many days are left in the year, and what percentage of the year is remaining. Handy for setting and tracking year-end goals.

Leap Year Calculator

• What is a leap year?
• When is a leap year?
• How to calculate leap year.
• Why do we need leap years?

Pregnancy Countdown Calculator

The calculator also generates a due date countdown meter and a printable pregnancy countdown calendar containing days along and days left in each date cell.

Printable Weekly Planner

Create and print a blank planner or a customized planner complete with six color-coded, customizable time blocks.

Reverse Due Date Calculator

Calculate what date and day of the week your baby was conceived on based on your pregnancy due date, ultrasound, or 1st day of last menstrual period (LMP).

Also includes estimated dates for the range of days the pregnancy-causing «event» likely occurred within. Plus, you can also select any birth date — meaning you can use the calculator to answer questions such as .

• When was I conceived?
• When did I conceive my baby?
• When to get pregnant to have a baby in April (or any other month)?

• How to calculate conception date (Conception Calendar Calculator).
• How to plan baby birth date (Birth Month Conception Range Chart).

Monthly Schedule Creator

You can edit the individual day-of-the-month cells, and you can use the auto fill-in feature for adding reoccurring events, activities, appointments, work shifts, etc. Includes an optional to-do list feature for adding a to-do list with checkboxes to the calendar page (adds an 8th column). Also includes various design preference settings (dimensions, fonts, colors, etc.).

School Calendar Calculator

The calculator can exclude US federal holidays and Good Friday for you, allows you to adjust the days off according to your school calendar, and provides a printer-friendly school countdown or count-up calendar with the days-left and/or class-day-number displayed in each date cell! The Learn section includes answers to:

• How many days are in a school year?
• How many weeks are in a school year?
• How many months are in a school year?

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Days Calculator: Days Between Two Dates

How many days, months, and years are there between two dates?

Time & Date Calculator App for iOS

See how long remains before a deadline or exactly when those 30 days are up.

Calendar with Logo (PDF)

Add your company logo to our printable calendars.

Date Calculator API

Find a specific business date and calculate the working days in a given period.

Help and Example Use

API Services for Developers

Date Calculators

• Time and Date Duration – Calculate duration, with both date and time included
• Date Calculator – Add or subtract days, months, years
• Weekday Calculator – What Day is this Date?
• Birthday Calculator – Find when you are 1 billion seconds old
• Week Number Calculator – Find the week number for any date

Related Links

• Date/calendar related services – Overview
• Calendar Generator – Create a calendar for any year.
• The World Clock – Current time all over the world
• Countdown to any date

Love Our Site? Become a Supporter

• Browse our site advert free.
• Sun & Moon times precise to the second.
• Exclusive calendar templates for PDF Calendar.

Follow Us

© Time and Date AS 1995–2023. Privacy & Terms

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Date Calculator: Add to or Subtract From a Date

Enter a start date and add or subtract any number of days, months, or years.

Time & Date Calculator App for iOS

See how long remains before a deadline or exactly when those 30 days are up.

Calendar with Logo (PDF)

Add your company logo to our printable calendars.

Date Calculator API

Find a specific business date and calculate the working days in a given period.

Help and Example Use

Date Calculators

• Duration Between Two Dates – Calculates number of days.
• Time and Date Duration – Calculate duration, with both date and time included
• Birthday Calculator – Find when you are 1 billion seconds old
• Weekday Calculator – What Day is this Date? – Find the weekday for any date
• Week Number Calculator – Find the week number for any date

Related Links

• Date/calendar related services – Overview
• Calendar Generator – Create a calendar for any year.
• The World Clock – Current time all over the world
• Countdown to any date

Love Our Site? Become a Supporter

• Browse our site advert free.
• Sun & Moon times precise to the second.
• Exclusive calendar templates for PDF Calendar.

Follow Us

© Time and Date AS 1995–2023. Privacy & Terms

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