Date & Time Calculators
Date Difference Calculator
Count the exact number of elapsed days between two calendar dates.
Open calculatorDate & Time Calculators
Days Until Calculator
Count down the number of days from a starting date to a target date.
LOCAL CALCULATION
Enter your values
Result
Your result and calculation steps will appear here.
Your calculations are processed locally and are not stored.
How to Calculate
- Choose the date you are counting down to.
- Optionally choose a starting date; leave it empty to use today.
- Calculate to see a positive future count or negative past count.
Formula
Days until = (Target date − Start date) ÷ 86,400,000 msExample
From January 1 to January 10, there are 9 elapsed days.
Frequently Asked Questions
What does a negative result mean?
A negative number means the target date occurred before the selected starting date.
Is today included?
The result measures elapsed date boundaries; a target of tomorrow returns one day.
Can I count from a date other than today?
Yes. Enter any valid starting date in the optional Count from field.