🧮 Free Calculator
Date Difference Calculator
Pick a start and end date. We show calendar days, whole weeks, and an approximate month count (30.44-day average month — not the same as “calendar months”).
✓ No signup ✓ Instant results ✓ Works offline
Inputs
Results
0
Days between
0
Whole weeks
0
Approx. months (avg length)
Reading the numbers
Days use midnight-to-midnight UTC-neutral local dates in your browser. Weeks are whole 7-day blocks inside that span. Approximate months divide the day count by 30.44 — handy for rough duration, not for legal “one calendar month” rules.