9 free tools
Date & time calculators
Premium, mobile-friendly calculators for duration, age, working days, weeks, and timestamps — structured for SEO, answer engines, and worldwide users.
Every tool answers a clear question in one screen. Combine with world clocks, zone conversion, holidays, and calendars for complete planning.
📅 Date to Date Days, weeks, months between two dates ➕ Date Calculator Add or subtract days, weeks, months 💼 Business Days Working days count or due dates 🎂 Age Calculator Exact years, months, days + next birthday 🗓 Weekday What day of the week is a date? #️⃣ Week Number ISO week + Mon–Sun range 📈 Day of Year Day number and year progress % ⏱ Time Duration Hours & minutes between times 🔢 Unix Timestamp Epoch ↔ human date converter
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Calculators FAQ
What calculators does TimeVent offer?
Date-to-date duration, add/subtract dates, weekday and week number, age, business days, time duration, Unix timestamps, and day of year — all free in your browser.
Do I need an account?
No. Calculators run locally in your browser with no signup and no data upload.
How do these help with worldwide planning?
Pair calculators with world clocks, the meeting planner, and country holidays for travel, payroll, and remote teams.