Kilowatt Hour to Electron Volt
kWh
eV
Conversion History
| Conversion | Reuse | Delete |
|---|---|---|
1 kWh (Kilowatt Hour) → 2.246943266805874538799446753134960523959307723e+25 eV (Electron Volt) Just now |
Quick Reference Table (Kilowatt Hour to Electron Volt)
| Kilowatt Hour (kWh) | Electron Volt (eV) |
|---|---|
| 0.1 | 2,246,943,266,805,874,538,799,446.75313496052395930772 |
| 1 | 22,469,432,668,058,745,387,994,467.53134960523959307723 |
| 5 | 112,347,163,340,293,726,939,972,337.65674802619796538613 |
| 10 | 224,694,326,680,587,453,879,944,675.31349605239593077226 |
| 30 | 674,082,980,041,762,361,639,834,025.94048815718779231679 |
| 100 | 2,246,943,266,805,874,538,799,446,753.13496052395930772262 |
| 886 | 19,907,917,343,900,048,413,763,098,232.77575024227946642243 |
About Kilowatt Hour (kWh)
A kilowatt-hour (kWh) is the energy consumed by a 1,000-watt (1 kW) device operating for one hour — equal to 3,600,000 joules. It is the standard unit on residential and commercial electricity bills worldwide. One kWh is a tangible, human-scale quantity: it runs a 60 W lightbulb for 16.7 hours, powers a modern refrigerator for a day, or adds about 6 km of range to a typical electric vehicle. Global electricity consumption and power plant outputs are expressed in terawatt-hours (TWh).
A typical US household uses about 886 kWh per month. Charging an electric vehicle from empty to full takes 50–100 kWh depending on battery size.
About Electron Volt (eV)
An electron volt (eV) is the kinetic energy gained by a single electron accelerating through an electric potential difference of one volt — equal to approximately 1.602 × 10⁻¹⁹ joules. It is the natural energy unit of particle physics, atomic physics, and chemistry, where joules would yield unwieldy powers of 10. Photon energies, ionisation energies, bandgaps in semiconductors, and masses of subatomic particles (via E = mc²) are all expressed in eV, keV, MeV, or GeV.
Visible light photons carry 1.8–3.1 eV of energy. The proton rest mass is 938 MeV. The Large Hadron Collider accelerates protons to 6.5 TeV (6.5 × 10¹² eV).
Kilowatt Hour – Frequently Asked Questions
What is the difference between kW and kWh?
A kilowatt (kW) is a rate of energy use — power. A kilowatt-hour (kWh) is a total amount of energy consumed over time. A 2 kW heater running for 3 hours uses 6 kWh. Your electricity meter tracks cumulative kWh, not kW. Confusing the two is one of the most common mistakes in energy discussions, similar to confusing speed with distance.
How many kWh does the average US household use per month?
The US Energy Information Administration puts the national average at about 886 kWh per month (roughly 29 kWh per day). Homes in hot states like Louisiana average over 1,100 kWh due to air conditioning; mild-climate states like Hawaii average under 500 kWh. A household's bill equals kWh consumed multiplied by the local rate, typically $0.10–$0.30 per kWh.
How many kWh does it take to fully charge an electric car?
Most EVs have battery packs of 50–100 kWh. A Tesla Model 3 Long Range holds about 75 kWh; a Rivian R1T about 135 kWh. Charging from empty to full at home costs roughly $7–$20 depending on battery size and local electricity rates. At $0.15/kWh, a 75 kWh charge costs $11.25 — far cheaper than filling a petrol tank for equivalent range.
How much does one kilowatt-hour of electricity cost?
In the US, residential electricity averages about $0.16/kWh nationally but ranges from $0.10 in Louisiana to $0.45 in Hawaii. In Europe, prices are higher: Germany averages €0.30–0.40/kWh. One kWh runs a modern fridge for about 24 hours, powers a 55-inch LED TV for 10 hours, or charges a smartphone roughly 80 times.
How many kWh does a solar panel produce per day?
A standard 400 W residential solar panel produces about 1.2–2.0 kWh per day depending on location, orientation, and weather. In sunny Arizona, expect the high end; in cloudy Seattle, the low end. A typical US home rooftop system of 20 panels (8 kW) generates roughly 25–40 kWh per day — enough to cover most or all of the household's electricity needs.
Electron Volt – Frequently Asked Questions
Why do particle physicists use electron volts instead of joules?
Because subatomic energies in joules have absurdly small exponents — a visible-light photon carries about 3 × 10⁻¹⁹ J, but a convenient 1.9 eV. The electron volt is scaled to the quantum world, making numbers human-readable. It also doubles as a mass unit (via E = mc²): a proton is 938.3 MeV/c², far easier to work with than 1.673 × 10⁻²⁷ kg.
How much energy in electron volts does visible light carry?
Visible light photons range from about 1.65 eV (deep red, 750 nm) to 3.1 eV (violet, 400 nm). Green light, where the human eye is most sensitive, sits around 2.3 eV. Ultraviolet photons start at 3.1 eV and can exceed 100 eV in the extreme UV. These energies are why UV can damage DNA (breaking molecular bonds of 3–5 eV) while visible light cannot.
What is the relationship between electron volts and semiconductor bandgaps?
A semiconductor's bandgap — the minimum energy to free an electron from its bond — is expressed in eV. Silicon has a bandgap of 1.12 eV, gallium arsenide 1.42 eV, and gallium nitride 3.4 eV. The bandgap determines which wavelengths of light a solar cell can absorb and what color an LED emits. Lower bandgap means longer-wavelength (redder) light.
How many electron volts does the Large Hadron Collider produce?
The LHC accelerates protons to 6.5 TeV (6.5 × 10¹² eV) per beam, giving collisions a center-of-mass energy of 13 TeV. That sounds enormous, but 13 TeV is only about 2 microjoules — the kinetic energy of a flying mosquito. The power of the LHC lies in concentrating that energy into a space a million times smaller than an atom.
How do you convert electron volts to joules?
Multiply by 1.602 176 634 × 10⁻¹⁹. So 1 eV = 1.602 × 10⁻¹⁹ J, 1 keV = 1.602 × 10⁻¹⁶ J, and 1 MeV = 1.602 × 10⁻¹³ J. This conversion factor is exactly the elementary charge in coulombs, because an electron volt is defined as the energy gained by one electron charge crossing one volt of potential.