Electric Work
Compute electrical energy from W = U I t and convert to joules, watt-hours and kilowatt-hours.
Inputs
Formula
W = U I t
Fundamentals
Electric work is the work done by the field moving charge — a measure of energy consumed.
$W=UIt=Pt$, $U$ voltage, $I$ current, $t$ time, $P$ power; commonly metered in kWh (1 kWh = $3.6\times10^6$ J).
History
Electric work equals voltage times charge, from energy conservation; the kWh is the billing unit.
Engineering applications
Used for meters, energy accounting, battery capacity and cost estimation.
Glossary
| Work $W$ | Work done by current (J). |
| Power $P$ | Rate of work, $P=UI$. |
| Energy unit | Usually kilowatt-hour kWh. |
How to use
- Fill in Voltage U, Current I, Time t in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Energy W, Watt-hour Wh, kWh in the results area.
Formula notesElectric work W = U·I·t = P·t (U voltage, I current, t time, P power).
Formula · Worked Example · Knowledge
Formula
Electric energy $W=UIt$, in J, Wh and kWh ($1\,\text{kWh}=3.6\times10^6\,\text{J}$).
Worked Example
U=220 V, I=5 A, t=3600 s → W=3.96e6 J=1.1 kWh.
Key Points
- Bills are charged per kWh (degree).
- Power $P=UI$ is work per unit time.
- Saving energy = lowering W (voltage/current/time).
Parameters
Inputs
| Parameter | Symbol | Unit | Default |
|---|---|---|---|
| Voltage U (V) | U | V | 220 |
| Current I (A) | I | A | 5 |
| Time t (s) | t | s | 3600 |
Outputs
| Result | Symbol | Unit |
|---|---|---|
| Energy W | J | J |
| Watt-hour Wh | Wh | Wh |
| kWh | kWh | kWh |
Applications
- Common engineering use cases
FAQ
What formula does this tool use?
This tool computes per ISO / AGMA / ASME standard formulas: W = U I t
How accurate are the results?
Results match input precision, based on SI units and common engineering approximations; for critical duty re-check with a safety factor.
Where is it used?
Common engineering use cases