The practical corner
Useful tools.
Clear answers.
Small calculations for dates, work, planning, and money. No account required.
01
Date & time
Days between dates
Count elapsed calendar days between two dates.
Open calculator →02Date & time
Business-day planner
Count weekdays and exclude your own holiday dates.
Open calculator →03Work
Shift end time
Find an end time from working hours and an unpaid break.
Open calculator →04Planning
Visual date planner
See your date range on a month-by-month calendar.
Open calculator →05Bitcoin
Bitcoin & satoshi converter
Convert BTC, satoshis, and a USD amount using your chosen price.
Open calculator →06Money
Recurring investment growth
Explore a hypothetical fixed-return contribution scenario.
Open calculator →Date and work tools developed from the Day Delta Tools project. Calculations run in your browser.