Date & Time Calculators
Date and time calculators make it easy to check ages, convert time measurements and handle everyday date and time calculations.
Age Calculator
Find your exact age and count down to your next birthday.
Find my age →Date Difference Calculator
Calculate the exact time between two dates in years, months, days, weeks, hours and more.
Compare dates →Event Countdown Timer
Create a live countdown to birthdays, vacations, weddings, holidays and other upcoming events.
Start a countdown →Time Converter
Quickly convert hours, minutes and seconds.
Convert time →Pregnancy Due Date Calculator
Estimate your baby’s due date and important pregnancy milestones.
Calculate due date →Free Date & Time Calculators for Ages, Countdowns and Time Conversions
Need to calculate your exact age, measure the difference between dates, convert hours into minutes or count down to an upcoming event? MyCruncher offers free online Date & Time Calculators for everyday planning.
These tools help with birthdays, appointments, vacations, school assignments, work schedules, event planning and important dates.
Choose a calculator, enter your information and review your results without working through calendar arithmetic manually.
Date and time calculations can be influenced by leap years, varying month lengths, local time zones and daylight saving time.
Browse Date & Time Calculators by Purpose
Select the tool that matches your question.
Which Date & Time Calculator Should You Use?
| Your Question | Suggested Calculator |
|---|---|
| How old am I exactly? | Age |
| How many days between two dates? | Date Difference |
| How long until my vacation? | Event Countdown |
| How many minutes are in 3 hours? | Time Converter |
| When is my estimated due date? | Pregnancy Due Date |
Age Calculator — Find Your Exact Age
An Age Calculator helps determine elapsed calendar time between a person’s date of birth and a selected reference date.
Rather than relying on a simple year subtraction, an exact age calculation accounts for whether the birthday has already occurred during the reference year.
Age Calculation Example
Suppose someone was born on January 15, 2000, and wants to know their age on January 15, 2026.
The result changes depending on the selected reference date.
How to Use the Age Calculator
- Enter your date of birth.
- Select or confirm the reference date.
- Calculate your age.
- Review your calendar age and next-birthday information.
Date Difference Calculator — Days Between Two Dates
The Date Difference Calculator compares two calendar dates and displays elapsed years, months, days and total days.
It can also display total weeks, hours, weekdays and weekend days based on the dates entered.
Date Difference Example — January 1 to January 15
Suppose you want to measure the time from January 1 to January 15 of the same year.
If you choose to include the ending date, the inclusive calendar-day count becomes 15 days.
Date Difference Comparison Chart
These examples use whole calendar days and compare dates within the same month.
| Start Date | End Date | Days Apart |
|---|---|---|
| Jan 1 | Jan 2 | 1 |
| Jan 1 | Jan 8 | 7 |
| Jan 1 | Jan 15 | 14 |
| Jan 1 | Jan 22 | 21 |
| Jan 1 | Jan 31 | 30 |
The chart excludes the ending date from the inclusive-day count. The live calculator offers an option to include it.
Time Converter — Hours, Minutes and Seconds
The MyCruncher Time Converter helps you convert commonly used time units without manually multiplying or dividing large amounts.
Basic Time Conversion Formulas
Time Conversion Example — 2.5 Hours
Suppose a task takes two and a half hours.
Hours to Minutes and Seconds Chart
| Hours | Minutes | Seconds |
|---|---|---|
| 0.25 | 15 | 900 |
| 0.5 | 30 | 1,800 |
| 1 | 60 | 3,600 |
| 1.5 | 90 | 5,400 |
| 2 | 120 | 7,200 |
| 2.5 | 150 | 9,000 |
| 3 | 180 | 10,800 |
| 4 | 240 | 14,400 |
Event Countdown Timer — Days Until Your Event
The Event Countdown Timer creates a continuously updating countdown for an upcoming event.
Enter the event name, date and optional time. The calculator displays remaining days, hours, minutes and seconds.
How Countdown Time Works
A countdown measures the time between the current moment and a future event. The main display separates complete 24-hour periods from the remaining hours, minutes and seconds.
Countdown Example
Suppose an event is exactly 10 days and 6 hours away.
The timer updates as time passes. It uses local time information from the device displaying the countdown.
Countdown Time Conversion Chart
These examples assume complete 24-hour days.
| Days | Hours | Minutes |
|---|---|---|
| 1 | 24 | 1,440 |
| 2 | 48 | 2,880 |
| 3 | 72 | 4,320 |
| 5 | 120 | 7,200 |
| 7 | 168 | 10,080 |
| 10 | 240 | 14,400 |
| 14 | 336 | 20,160 |
These are duration conversions. Actual wall-clock differences across daylight-saving changes can vary.
Pregnancy Due Date Calculator — Estimated Delivery Date
The Pregnancy Due Date Calculator provides an estimated pregnancy due date using the information entered, such as the first day of the last menstrual period or a conception date.
The calculator can also help organize estimated pregnancy milestones, including trimester timing.
Understanding the 40-Week Estimate
A common initial pregnancy dating method estimates 40 weeks, or 280 days, from the first day of the last menstrual period, based on standard assumptions.
Pregnancy Timing Example
Under the standard 40-week dating model:
This is a general estimation method. Cycle variation, conception timing, ultrasound findings and clinical factors can change the estimated due date.
Pregnancy dates should always be discussed with a qualified healthcare professional when used for medical decisions or prenatal care.
Important Differences Between Calendar Dates and Durations
A duration of 30 days is not always the same as one calendar month. Months vary in length, and leap years affect February.
Calendar Month Length Comparison
| Month | Days |
|---|---|
| January | 31 |
| February | 28 or 29 |
| March | 31 |
| April | 30 |
| May | 31 |
| June | 30 |
| July | 31 |
| August | 31 |
| September | 30 |
| October | 31 |
| November | 30 |
| December | 31 |
Helpful Tips for Date and Time Calculations
- Check your dates. Make sure the month, day and year are entered correctly.
- Choose the correct tool. Age, date differences, durations and countdowns answer different questions.
- Understand inclusive dates. Counting both the starting and ending dates changes the total.
- Consider leap years. February may contain 29 days.
- Watch time zones. The same event can have different local clock times around the world.
- Check daylight saving changes. Local clock adjustments can affect elapsed time.
- Verify important deadlines. Official scheduling rules can differ from simple calendar estimates.
Frequently Asked Questions
Are MyCruncher Date & Time Calculators free?
Yes. MyCruncher offers free online tools for age calculations, date differences, countdowns and time conversions.
How do I calculate my exact age?
Enter your birth date in the Age Calculator to find your calendar age and next-birthday information.
How do I calculate days between dates?
Choose your starting and ending calendar dates in the Date Difference Calculator and review the elapsed days and other measurements.
Can I count both the start and end dates?
The Date Difference Calculator includes an option to count the ending date. Review your intended counting method for important deadlines.
How many minutes are in two hours?
Two hours equal 120 minutes.
How many seconds are in one hour?
One hour equals 3,600 seconds.
Can I create a birthday countdown?
Yes. Enter the birthday date and an optional time in the Event Countdown Timer.
Does the countdown update automatically?
Yes. The live countdown updates each second as the event approaches.
Does the Event Countdown Timer use my local time?
Yes. It uses the device’s local time. For events across time zones, verify the intended time separately.
Can I calculate a pregnancy due date?
Yes. The Pregnancy Due Date Calculator provides a general estimate and pregnancy milestones. It does not replace professional prenatal care.
Are calendar months always 30 days long?
No. Months contain 28, 29, 30 or 31 days depending on the month and year.
Can I use these calculators on my phone?
MyCruncher calculator pages are designed for mobile and desktop use.
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