Calculate the length of a semester or term in weeks, days and calendar months. The calculator runs entirely in your browser and pairs a focused answer with the method, assumptions and the related tools worth checking next.
Your inputs stay in this browser tab. Nothing is sent to a server to produce the result.
Review the inputs and select Calculate.
Enter the first and last dates of the semester or term. The calculator counts the days between them and reports the length as whole weeks plus remaining days, with the total days, calendar duration, approximate months and weekday count alongside.
The headline result divides the total days by 7, giving whole weeks and leftover days. The detail rows show the exact calendar duration in months and days, an approximate month count (total days ÷ 30.436875) and the Monday-to-Friday weekdays in the span, counting both the first and the last date.
1 September 2026 to 15 December 2026 is 105 days: 15 weeks, 0 days. The calendar duration is 3 months, 14 days (about 3.45 months), with 76 weekdays.
Swapping the two dates gives the same result, because the length is the absolute span between them. Every day inside the span counts alike: reading weeks, holidays and breaks are included as ordinary days, not deducted.
Enter the semester start and end dates, then select Calculate. Each step below is a short action rather than a wall of explanation.
Use the most reliable source value available for this input.
Use the most reliable source value available for this input.
Read the result, then copy, print or share a link that reopens the same inputs.
Count complete calendar years, then complete calendar months, then the remaining days.
Similar tools answer different questions. Match the inputs and the reference point to the answer you actually need.
The numbers come from your inputs; this shows the shape of the calculation.
Enter the first date of the semester or term.
Enter the last date — the length is the absolute span between the two dates, so their order does not matter.
The length as whole weeks plus remaining days, with the detail alongside: 1 September to 15 December 2026 is 105 days — 15 weeks, 0 days — with 76 weekdays. Reading weeks, holidays and breaks inside the span are counted, not deducted.
Use exact source inputs, keep the reference date visible and verify any official rule separately.
Set the reference date to the event that actually controls the decision, not to today.
Compare the stated method here against the other tool's convention before assuming an error.
For a neighbouring calculation, open the Age at Event Calculator or the School Starting Age Calculator. To understand the reasoning first, read How to Calculate School Starting Age.
Choose another focused tool when the underlying question changes.
Understand the calendar rules, edge cases and next steps behind this calculator.
Answers about method, inputs, privacy, boundaries and responsible interpretation.
Enter the first and last dates of the semester or term. The calculator counts the days between them and reports the length as whole weeks plus remaining days, with the total days, the calendar duration, approximate months and the weekday count alongside.
1 September 2026 to 15 December 2026 is 105 days: 15 weeks, 0 days. The calendar duration is 3 months, 14 days (about 3.45 months), with 76 weekdays.
By dividing the total days by 30.436875, the average month length. It is an approximation for comparison; the calendar duration in whole months and days is the exact figure.
No. Every day inside the span counts alike: reading weeks, holidays and breaks are included as ordinary days, not deducted, so the result is the full calendar length of the term.
No. Swapping the two dates gives the same result, because the length is the absolute span between them.
Navjeet Kamboj is the author and editor of Age Calculator Lab. He focuses on making age, date, milestone and planning calculations easier to understand through clearly explained methods, practical examples and responsible limitations.