Why use DateCalc?
- 100% free, no signup. Open the page and use the tool — no account, no email, no paywall.
- Private by design. Everything runs in your browser. Your inputs never leave your device.
- Fast on any device. Lightweight pages that load instantly on mobile and desktop.
Guides & how-tos
Practical guides about date difference calculators — written to actually help, not to waste your time.
Business Days vs Calendar Days: What Deadlines Really Mean
"Delivery in 5 days" and "delivery in 5 business days" can differ by nearly a week. Knowing which one a deadline uses saves real money and missed f...
How to Count Days Between Two Dates (Without a Calendar Headache)
"How many days until…?" sounds simple until months with 28, 30 and 31 days get involved. Here's how the counting actually works — and the common tr...
Frequently asked questions
Does it count both the first and last day?
The result is the number of full days between the dates (end minus start), the standard used by contracts and HR. Add 1 if you need an inclusive count of calendar days touched.
What are business days?
Monday to Friday, excluding weekends. Public holidays vary by country, so they are not subtracted.
Can I count days until a future date?
Yes — set today as the start and your event as the end date to get an exact countdown in days.