Countdown Calculator
Count down to any date and time, with totals in weeks, days, hours and business days — shareable by link.
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How this countdown calculator works
Pick a target date and, optionally, a time — if you leave the time blank it defaults to midnight. The tool subtracts the current moment on your device from that target and breaks the remaining duration down into days, hours, minutes and seconds, refreshing every second. The formula is simple: remaining = target − now, then the total milliseconds are divided down through days (÷86,400,000), hours (÷3,600,000), minutes (÷60,000) and seconds (÷1,000), carrying the remainder at each step so the numbers read like a clock rather than one huge count.
Worked example: if today is September 13, 2026 and you count down to December 25, 2026 at midnight, the target is 103 days away — that's also 14 weeks and 5 days, roughly 2,472 hours, and about 75 business days once weekends are excluded. The weekday panel would show that December 25, 2026 falls on a Friday.
The totals section converts the same remaining duration into other useful units: whole weeks and days give you a sense of scale for longer countdowns, hours are handy for near-term events, and business days count only Monday through Friday, which is useful for deadlines, shipping estimates or work-related targets. Business day totals do not exclude public holidays.
Quick presets fill in common targets — the next New Year's Day, the next Christmas, the next Friday, or 30/90 days from today — so you don't have to calculate a date by hand. Whatever date, time and label you choose is encoded directly in the page's URL after the # symbol, so clicking "Copy link" gives you a URL that reopens to the exact same countdown on any device, no account or server storage required.
If the target date has already passed, the display switches to counting up instead, showing how long ago the moment happened, so the same link keeps working as a simple elapsed-time tracker afterward.
Countdown Calculator: frequently asked questions
How is the countdown calculated?
The tool takes the difference between the current time on your device and the target date and time you set, then breaks that duration down into days, hours, minutes and seconds, updating live every second.
What counts as a business day?
Business days are Monday through Friday. The business-day total counts each weekday between now and your target date, skipping Saturdays and Sundays. It does not account for public holidays.
Can I share my countdown with someone?
Yes. The date, time and label you set are encoded in the page URL after the # symbol. Click "Copy link" and send the URL — anyone who opens it will see the same countdown to the same moment.
Does the countdown account for my timezone?
The target date and time are interpreted in your device's local timezone, and the countdown runs against your device's local clock, so the result is accurate for whoever opens the page in their own timezone rather than a fixed one.
What happens after the target date passes?
The countdown switches to showing how much time has elapsed since the target moment instead of counting down, so the page keeps working as a "time since" tracker once the event has happened.