Work from one pound-force over one foot.
Foot-pounds to Electronvolts Converter — ft-lb to eV
Convert Foot-pound (ft-lb) to Electronvolt (eV) using the exact conversion factor (1 foot-pound = 8.46235e+18 electronvolt). See the formula, worked examples, conversion table, and common uses.
Foot-pounds to Electronvolts converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
An electronvolt is the energy gained by an electron across one volt.
Result = input x 1.355817948 / 1.60217663e-19.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Electronvolts
Foot-pound and Electronvolt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Work from one pound-force over one foot, and an electronvolt is the energy gained by an electron across one volt.
Formula
electronvolts = foot-pounds × 8.46235e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 foot-pound equals 1.35581794833 base units, and 1 electronvolt equals 1.602177e-19 base units, so dividing one by the other gives the direct foot-pound-to-electronvolt factor of 8.46235e+18.
Simple example
1 ft-lb × 8.46235e+18 = 8.46235e+18 eV
1 foot-pound = 8.46235e+18 electronvolts.
Real-world example
100 ft-lb × 8.46235e+18 = 8.46235e+20 eV
100 foot-pounds = 8.46235e+20 electronvolts.
Conversion table
| Foot-pound (ft-lb) | Electronvolt (eV) |
|---|---|
| 1 ft-lb | 8.46235e+18 eV |
| 10 ft-lb | 8.46235e+19 eV |
| 50 ft-lb | 4.231175e+20 eV |
| 100 ft-lb | 8.46235e+20 eV |
| 500 ft-lb | 4.231175e+21 eV |
| 1,000 ft-lb | 8.46235e+21 eV |
Reverse conversion: Electronvolt to Foot-pound
8.46235e+18 eV × 1.181705e-19 = 0.9999999967 ft-lb
8.46235e+18 electronvolts = 0.9999999967 foot-pounds.
foot-pounds = electronvolts × 1.181705e-19
For a page dedicated to this direction, see Electronvolt to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Electronvolt
Electronvolt (eV) measures energy. The energy gained by a single electron accelerated through an electric potential difference of one volt — a very small amount of energy, exactly 1.602176634 × 10⁻¹⁹ joules. It is classified as a non-SI unit accepted for use with the SI, common in physics.
Where it's used: Standard unit throughout particle physics, atomic physics, and chemistry worldwide
Uses of the Electronvolt today
- Particle physics (particle accelerator energies are often quoted in GeV or TeV)
- Atomic and molecular energy levels
- Semiconductor band-gap energies
Electronvolt — sources
- BIPM SI Brochure, 9th edition — Electronvolt listed as a non-SI unit accepted for use with the SI, with its exact value fixed via the elementary charge.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many electronvolts are in 1 foot-pound?
1 foot-pound equals 8.46235e+18 electronvolts, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to electronvolt?
Multiply the foot-pound value by 8.46235e+18. The converter above does this instantly to whatever precision you set.
How do I convert electronvolt back to foot-pound?
Use the reverse factor: 1 electronvolt equals 1.181705e-19 foot-pounds. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot-pound?
Foot-pound (ft-lb) is a unit of engineering.
What is a electronvolt?
Electronvolt (eV) measures energy. The energy gained by a single electron accelerated through an electric potential difference of one volt — a very small amount of energy, exactly 1.602176634 × 10⁻¹⁹ joules. It is classified as a non-SI unit accepted for use with the SI, common in physics.
Is the foot-pound to electronvolt conversion exact?
Yes. The energy gained by a single electron accelerated through an electric potential difference of one volt — a very small amount of energy, exactly 1.602176634 × 10⁻¹⁹ joules. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.