Convert between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, decades and more. Instant and 100% private.
✅ Free⏱️ 14 Units⚡ Live⇄ Bidirectional🔒 Private
⭐⭐⭐⭐⭐4.9 / 5(9,841 ratings)
⏱️Time Converter — Convert Now
From
To
Enter a value above to convert
📐 Full Breakdown — your value in all time units
Quick Pairs
≡All Units — Click any value to copy it
Unit
Symbol
Converted Value
⚡
Live Conversion
Values update instantly as you type in either field. Bidirectional with no button needed.
📐
Full Breakdown
See your value broken down into all time units simultaneously in the visual breakdown grid.
⇄
Swap Units
Click ⇄ to instantly reverse From and To — bidirectional conversion in one click.
🔒
100% Private
All conversion runs in JavaScript in your browser. Nothing is sent to any server.
⭐ User Reviews
4.9
⭐⭐⭐⭐⭐
Based on 9,841 verified reviews · 99% recommend this tool
L
Lena R.
Yesterday
⭐⭐⭐⭐⭐
The breakdown grid showing my value in every unit simultaneously is fantastic. I pasted 86,400 seconds and instantly saw it was exactly 1 day. The nanosecond precision is great for programming work.
Time Converter
T
Tom K.
4 days ago
⭐⭐⭐⭐⭐
I use hours to days and minutes to hours constantly for project scheduling. Live bidirectional input and swap button make it effortless. The fortnight and decade options are a fun bonus.
Time Converter
M
Maya F.
1 week ago
⭐⭐⭐⭐⭐
Milliseconds to seconds is my daily use case for performance benchmarking. The JetBrains Mono font on the values makes it readable at a glance. Clean, fast and accurate.
Time Converter
G
Greg P.
2 weeks ago
⭐⭐⭐⭐⭐
The century and millennium options are rare to find in time converters. I use them for historical research calculations. The all-units table shows everything at once — exactly what I needed.
Time Converter
📖 How to Use the Time Converter
1
Enter a Value
Type the time value in the From field. Conversion runs live as you type — no button needed.
2
Select Your Units
Choose From and To units from the dropdowns. Use Quick Pair buttons for common conversions.
3
See the Breakdown
The visual breakdown grid shows your value in all time units simultaneously for quick comparison.
4
Copy the Result
Click Copy next to the result, or click any value in the All Units table or breakdown grid to copy it.
1 day = 24 hours = 1,440 minutes = 86,400 seconds exactly. 1 week = 604,800 seconds. 1 year (Julian) = 365.25 days = 31,557,600 seconds.
How many days in a month (this converter)?+
This converter uses the average Gregorian month = 365.2425/12 = 30.436875 days for the month conversion factor. For calendar-exact month calculations use a date difference calculator.
What is a fortnight?+
A fortnight = 14 days = 2 weeks = 1,209,600 seconds. The word comes from "fourteen nights" and is still commonly used in British English for a two-week period.
What is the difference between a nanosecond and a millisecond?+
1 millisecond (ms) = 1,000 microseconds (μs) = 1,000,000 nanoseconds (ns) = 0.001 seconds. Nanoseconds are used in computer hardware timing and physics; milliseconds are used in network latency and human reaction time measurement.
How many years in a century vs a millennium?+
1 century = 100 years. 1 millennium = 1,000 years = 10 centuries. This converter uses the Julian year (365.25 days) for all year-based calculations.
💡 Why Use Our Time Converter?
⚡
Both-Way Live
Edit either field for instant conversion — no reverse tool needed.
📐
Visual Breakdown
See your value in all units at once in a clear grid — click any to copy.
⇄
One-Click Swap
Reverse From/To with one click.
🎯
Quick Pairs
Common conversions as one-click shortcuts.
🔒
Zero-Upload Privacy
Runs entirely in your browser.
🆓
Free, No Account
Unlimited use, no sign-up.
📚 Reference — Time Conversion Factors
Common Conversions
Popular queries: seconds to minuteshours to daysminutes to hourstime converter