Date and time tools: the complete guide
Most date and time questions come down to one of three shapes: how far apart are two dates, how does one unit of time convert into another, and what does a given date look like on a different calendar. A purpose-built tool answers each of these instantly, so you never have to count on your fingers or wrestle with leap years.
This guide is a map of the free date and time tools and which one to reach for. Each runs instantly in your browser — no sign-up, no installs — so you pick the tool that matches your question and read off the answer.
Days between two dates
The date difference calculator counts the exact number of days — and the equivalent weeks, months and years — between any two dates. It handles leap years and uneven month lengths automatically, which is where manual counting usually goes wrong. For the method behind it, read counting the days between two dates.
A close cousin is the age calculator, which measures the gap between a birth date and a reference date and reports it as years, months and days. See how to calculate your age for the full breakdown.
Converting units of time
The time converter moves a value between seconds, minutes, hours, days, weeks and more. It is the tool you want when a duration is quoted in one unit but you think in another — turning 90 minutes into 1.5 hours, or 3 days into 72 hours. The conversion factors and worked examples live in converting units of time.
Nepali and English calendars
- BS to AD converter — turn a Bikram Sambat (Nepali) date into its Gregorian (English) equivalent.
- AD to BS converter — the reverse, from an English date to the matching Nepali date.
- Nepali calendar — browse the BS patro month by month, with festivals and holidays.
- English calendar — the familiar Gregorian calendar for quick day-of-week checks.
Why do BS and AD dates not sit a fixed number of years apart? The gap shifts through the year because the two calendars start their months on different days. The Nepali calendar (Bikram Sambat) explained and converting BS to AD dates guides cover this in full.
Which tool for which question
| Your question | Reach for |
|---|---|
| How many days until my deadline? | Date difference |
| How old am I exactly? | Age calculator |
| How many hours is 240 minutes? | Time converter |
| What is 2081 Shrawan 15 in AD? | BS to AD |
| What is today's date in BS? | AD to BS |
How to get an accurate answer
- Decide whether the count is inclusive. A date difference can count both end dates or just the gap between them — a one-day swing that matters for deadlines and rentals.
- Watch the units. A day is not always 24 "working" hours; convert with the time converter so the factor is applied correctly.
- Match the calendar. A Nepali (BS) date and an English (AD) date are not interchangeable — convert first with BS to AD or AD to BS.
Frequently asked questions
Are these date and time tools free?
Yes. Every tool on the date and time page is free and runs in your browser with no account required.
Do the calculators count leap years?
Yes. The date difference and age calculators use the real length of each month and year, so leap days are always included.
Why is the gap between BS and AD dates not fixed?
Because the Bikram Sambat months begin on different days from the Gregorian months, the offset drifts through the year. Convert an exact date with BS to AD rather than adding a fixed number of years.
Browse all date and time tools
Open the date and time page to see the full set, or jump straight to the date difference, time converter or Nepali calendar if you already know what you need.
