Everyday use
Use these tools for general information and everyday planning. Results depend on your inputs and the stated conventions. Check the rules that apply to formal deadlines. Availability may change; do not disrupt the service or attempt unauthorized access. These terms do not exclude rights that applicable law protects.
Calendar conventions
Date differences count calendar dates, not elapsed hours. The start date is excluded unless inclusive counting is selected. Weekdays mean Monday–Friday without holiday exclusions. Ages use complete years, months, and days; February 29 birthdays use February 28 in common years for the next-birthday result.
Your data and preferences
Calculations run in your browser. No account is needed, and your inputs are not sent to our server.