Date Calculator
Add or subtract days, or count days between two dates.
Last updated: January 2025 · Built for the 2024–25 financial year
Inputs
Results
Result date
09 June 2026
Day of week
Tuesday
Results are estimates only. For financial advice, consult a licensed adviser.
Overview
Add, subtract or measure between dates
A date calculator answers two distinct questions: 'How long between two dates?' and 'What date is N days/weeks/months/years from this date?' Both rely on calendar-aware maths because months have 28-31 days and leap years add a day every four years (with century corrections).
It is essential for project deadlines, contract notice periods, visa expiry tracking, and counting business days for settlement and invoicing.
Common Australian date counts
| Use case | Convention |
|---|---|
| Property settlement | Usually 30, 42 or 60 calendar days from contract. |
| Notice of termination | Calendar days unless contract says business days. |
| Cooling-off (NSW property) | 5 business days, ends 5pm. |
| Tax lodgement | Calendar days; 31 Oct deadline (or via tax agent extension). |
Pro tips
- •Always confirm whether contracts mean 'business' or 'calendar' days.
- •Public holidays vary by state — check the relevant jurisdiction.
- •Use the calculator's 'as of' field to model future scenarios.