Date Calculator
Calculate app for Android · Free, with an optional Pro version that supports development
Work out the duration between two dates, add or subtract days from a date, and keep deadlines in view. Date maths without counting squares on a calendar.
- Duration between dates
- Add or subtract days
- Free & Pro
- Works offline
About Date Calculator
Date Calculator handles the arithmetic that calendars are bad at. How many days until a deadline? What date is ninety days from today? How long was it between two events?
The app does both directions. Give it two dates and it tells you the duration between them. Give it one date and a number of days, and it tells you where you land — forwards or backwards. That covers most of what people actually need: notice periods, project milestones, travel and visa windows, contract dates.
It is deliberately small and quick, opens straight onto the calculation, and runs with no connection. Date Calculator shows no ads in either version. A Pro version exists purely for people who would like to support the work — the features are identical to the free app.
What Date Calculator does
Duration between two dates
Pick a start and an end and see the gap, without counting squares on a calendar.
Add or subtract days
Work forward or back from a date to find the day a deadline actually lands on.
Made for planning
Useful for notice periods, project dates, visa windows and anything else counted in days.
Quick and offline
Opens straight onto the calculation and needs no connection.
How to use Date Calculator
Three steps from installing it to getting something out of it.
- 1
Install Date Calculator from Google Play and open it.
- 2
To measure a gap, set the start date and the end date and read off the duration.
- 3
To plan forward, pick a date and add or subtract the number of days you need.
Version & requirements
- Package name
- com.ng_labs.dateandtime
Permissions & data
Date Calculator does not collect personal information, and nothing you create in it is uploaded. This app shows no ads at all.
Full privacy policy →Date Calculator questions
What is the difference between Date Calculator and Date Calculator Pro?
Nothing, in features. Neither version shows ads. Pro exists only as a way to support continued development of the app.
Can it work backwards from a date?
Yes. You can subtract days as well as add them, so you can find the start date for a deadline.
Does it work without an internet connection?
Yes. All the calculations run on the device.
