How Long Have We Been Together?
Enter the day your relationship started and see exactly how long you've been together — to the second. Perfect for anniversaries.
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Curious how long you and your partner have been together? Enter the date your relationship started (your first date, the day you made it official, or whatever moment you both count as 'day one') and see the exact length of your relationship in years, months, days, hours, minutes, and live-ticking seconds.
Which date should you pick?
There's no single right answer — most couples settle on one of three: the first date, the day they officially became exclusive, or the day they said 'I love you'. Pick the one your partner would name if asked, and the calculator gives you a precise, sharable count from that moment.
If you want to be romantic about it, set the time as accurately as you remember. The live seconds counter is a fun way to mark exact moments — '1,000 days together' lands on a date you can plan around, and '100 million seconds together' is a quirky milestone almost nobody else will have thought of.
Relationship milestones worth celebrating
100 days together — small but sweet, often celebrated in K-drama and pop culture.
1,000 days together — roughly 2 years 9 months. A classic 'mini-anniversary' worth a card.
10,000 days together — about 27 years 4 months. The kind of number long-married couples like to share.
1 million minutes together — almost exactly 1 year, 11 months.
100 million seconds together — about 3 years, 2 months.
1 billion seconds together — about 31 years, 8 months. The ultimate flex.
Long-distance, military, and deployment couples
For couples separated by distance — military deployments, work assignments overseas, study-abroad semesters, or visa waits — a precise running count of time together becomes more than a fun stat. It's a tangible record of the relationship you're protecting.
Many military and long-distance couples use the same date twice: one count for 'time together as a couple' and a second count (using our Time Since calculator) for 'time since we last saw each other in person'. Pairing the two numbers makes for a powerful homecoming photo caption or care-package note.
If you're planning a reunion or homecoming, our Days Until calculator counts down to the date — set it next to this one and you've got both halves of the story on one screen.
Use this for anniversaries, vows, and toasts
Wedding speech writers love precise numbers — 'They've spent 9,247 days, 222,000 hours, and over 13 million minutes together' lands harder than 'about 25 years'. Use the totals to drop a memorable line into a toast, a card, or a social post on your anniversary.
Frequently asked questions
What date should I enter?
Whatever your couple counts as day one — first date, the day you became official, or the day you said I love you. Pick the date both of you would name if asked.
Why does the time matter?
Without a time, the calculator starts at midnight on the date you enter, which can be off by up to a day. For a precise seconds count, enter the time as accurately as you remember it.
Can I use this for an engagement date?
Yes. The calculator works for any past date — engagement, moving in together, your wedding, or any other relationship milestone.
Is the date saved anywhere?
No. Everything runs in your browser. Nothing is sent to a server or stored to your account.
How do I find the exact anniversary of a milestone like 1,000 days?
Use our Add or Subtract Days calculator: enter your start date and add 1,000 days. That gives you the exact calendar date of the milestone so you can plan a surprise.
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