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Date Difference Calculator
Dates
Fill in the fields above to see your result instantly.
How it works
Calendar days come from a simple subtraction. Business days iterate one day at a time and count Mon–Fri only.
Worked example
From 2026-01-01 to 2026-04-30 → 119 days, ~17 weeks, ~3 months 29 days, 86 business days.
Who should use this
- •Project planning
- •Calculating notice periods
- •Counting days until a deadline
Common mistakes
- ×Forgetting that business days exclude weekends but not bank holidays
- ×Mixing up 'from' and 'to' — we handle reversed dates but flag it
Frequently asked questions
Are bank holidays deducted from business days?▾
No — only Saturdays and Sundays are excluded. Add holiday adjustments separately.