App-Like Date Calculator

Smart Date Tools

All sections work independently. Click into any field to open the date picker.

Today

Calculate calendar-day difference between any two dates.

Start date

📆

End date

📆

Choose two dates and calculate.

Add or subtract a number of days from a chosen date.

Base date

📆

Number of days

Choose a date and enter an offset.

Convert a combination of days, hours, and minutes to total minutes.

Days

Hours

Extra minutes

Enter values and convert.

Calculate how many days remain until December 31.

Reference date

📆

Choose a date or leave empty to use today.

Switch between date → timestamp and timestamp → date. Supports Unix seconds and milliseconds.

Mode

Date

📆

Time

⏰

Choose mode and convert.