Time Converter
Convert between different units of time Convert between 19 different units instantly with our free online tool.
Formula: 1 s × 1,000 = 1,000 ms
Available Time Units
19 units supported for instant conversion
About Time Conversion
Our free online time converter helps you quickly and accurately convert between 19 different units of time. Whether you're a student, professional, or simply need everyday conversions, you get instant, precise results with the formula displayed.
Convert between different units of time This converter supports both metric and imperial units, making it ideal for international use. All conversions use internationally recognized standards and formulas.
Did You Know?
The second was originally defined as 1/86,400 of a mean solar day. Today it is defined as the duration of exactly 9,192,631,770 cycles of radiation from a caesium-133 atom.
Light from the Sun takes about 8 minutes 20 seconds to reach Earth. So when you look at the Sun (don't!), you're seeing it as it was over 8 minutes ago.
You pass the 1 billion seconds milestone at about age 31 years 8 months. The 2 billion second mark comes at about age 63 years 4 months.
A year on Mercury is just 88 Earth days, while a year on Neptune is 165 Earth years. Neptune has completed fewer than 1 orbit since it was discovered in 1846.
The average human lifespan of 79 years is about 2.49 billion seconds. That's roughly the same number of heartbeats for most mammals, regardless of size — smaller animals just have faster hearts.
Why Use Our Time Converter?
Instant Results
Conversions update as you type — no button clicks needed.
High Precision
Uses internationally standardized conversion factors (SI & NIST).
19+ Units
Convert between 19 time units used around the world.
API & AI Ready
REST API and MCP server let apps and AI assistants convert programmatically.
Common Time Conversion Table
Quick reference: Second (s) to other common units.
| Second (s) | Millisecond (ms) | Microsecond (μs) | Nanosecond (ns) | Picosecond (ps) |
|---|---|---|---|---|
| 1 | 1,000 | 1,000,000 | 1,000,000,000 | 1.000000e+12 |
| 2 | 2,000 | 2,000,000 | 2,000,000,000 | 2.000000e+12 |
| 5 | 5,000 | 5,000,000 | 5,000,000,000 | 5.000000e+12 |
| 10 | 10,000 | 10,000,000 | 1.000000e+10 | 1.000000e+13 |
| 25 | 25,000 | 25,000,000 | 2.500000e+10 | 2.500000e+13 |
| 50 | 50,000 | 50,000,000 | 5.000000e+10 | 5.000000e+13 |
| 100 | 100,000 | 100,000,000 | 1.000000e+11 | 1.000000e+14 |
How to Use This Time Converter
Enter Value
Type the number you want to convert
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Select To Unit
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