What does one watt represent in terms of power?

One watt is the SI derived unit of power, representing the transfer or conversion of one joule of energy per second.

Why use femtojoule/second units?

Femtojoule per second units are used to measure extremely small power levels, such as in nanoelectronic circuits and quantum experiments.

Is this conversion useful for everyday power ratings?

No, because the femtojoule scale is very small, converting ordinary power values gives very large and impractical numbers.

How to Convert from Watt [W] to Femtojoule/second [fJ/s]?

Learn how to convert power measurements from watts (W) to femtojoule per second (fJ/s), a unit used to express extremely small energy transfer rates in advanced fields like nanoelectronics and quantum physics.

Watt [W]

Femtojoule/second [fJ/s]

Please check your input. It must be a valid numeric value.

Watt [W] to Femtojoule/second [fJ/s] Conversion Table

Watt [W]	Femtojoule/second [fJ/s]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Watt [W] to Femtojoule/second [fJ/s] Conversion Table
Watt [W]	Femtojoule/second [fJ/s]

Explore More Power Units Converter

What Is This Tool?

This tool converts power values from watts, the SI unit measuring energy transfer per second, to femtojoule per second, which quantifies very small power levels used in specialized scientific fields.

How to Use This Tool?

Enter the power value in watts (W) you want to convert
Select watt as the input unit and femtojoule/second as the output unit
Submit the input to receive the equivalent power in femtojoule/second

Key Features

Converts power units from watt (W) to femtojoule/second (fJ/s)
Useful for applications in nanoelectronics, quantum devices, and precision experimental physics
Easy to use and browser-based with simple input and output formats

Examples

2 W equals 2 × 10^15 fJ/s or 2000000000000000000 fJ/s
0.5 W equals 0.5 × 10^15 fJ/s or 500000000000000 fJ/s

Common Use Cases

Calculating power consumption in ultra-low-power nanoelectronic circuits
Measuring power in single-photon detectors and molecular-scale devices
Reporting minimal heat loads or background power in quantum physics experiments

Tips & Best Practices

Ensure your measurement instruments can detect power at the femtojoule scale
Use this conversion for very small power levels to avoid handling overly large numbers unnecessarily
Confirm the scientific context to choose the correct unit for precise power representation

Limitations

Femtojoule/second units result in very large numbers when converting ordinary watt values
Requires precision instruments capable of measuring extremely small power for meaningful use
Not practical for general power measurements due to scale differences

Frequently Asked Questions

What does one watt represent in terms of power?: One watt is the SI derived unit of power, representing the transfer or conversion of one joule of energy per second.
Why use femtojoule/second units?: Femtojoule per second units are used to measure extremely small power levels, such as in nanoelectronic circuits and quantum experiments.
Is this conversion useful for everyday power ratings?: No, because the femtojoule scale is very small, converting ordinary power values gives very large and impractical numbers.

Key Terminology

Watt (W): The SI unit of power equal to one joule per second; measures energy transfer rate.
Femtojoule/second (fJ/s): A unit of power equal to 10^-15 joule per second, representing extremely small energy transfer rates.
Power: The rate at which work is done or energy is transferred or converted per unit time.

Quick Knowledge Check

What is the base unit of power used in this conversion?

Joule per second

Watt

Femtojoule per second

For which fields is the femtojoule/second unit commonly applied?

Nanoelectronics and quantum physics

Automotive engine ratings

Household appliance power

What happens to the numerical value when converting watts to femtojoule/second?

It becomes much larger

It remains the same

It becomes smaller

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