Weeks Are Just Days Divided by Seven

Unlike months, a week has an exact, invariant length: seven days. The exact number of weeks between two dates is therefore always total days ÷ 7 — 60 days is 8.57 weeks, no calendar table required. The interesting part is splitting that decimal into whole weeks and leftover days, which is what this calculator reports.

Exactness Across the Calendar

The day count is computed from UTC timestamps on the real calendar, so February 29, month-length variation, and century leap rules are all handled exactly. A span from January 1 to March 1 is 60 days in 2024 (a leap year) and 59 days in 2023 — the calculator reflects that difference down to the decimal week.

Weeks for Planning, Months for Contracts

Fixed 7-day weeks make a natural unit for training plans, shipping schedules, and habits; calendar months dominate contracts and billing. The approximate month figure (30.44-day average) is included as a bridge between the two units, always clearly labeled — the exact days and exact weeks are the numbers to rely on.