Convert Electronvolt mass to Quarters
Convert Electronvolt mass (eV/c²) to Quarters (qr) instantly and accurately.
Conversion Formula
qr = eV/c² × 1.403606000e-37
About Electronvolt mass
In particle physics, mass and energy are interchangeable via Einstein's E = mc². The electronvolt (eV) as a mass unit equals the mass equivalent of 1 eV of energy (approximately 1.783 × 10⁻³⁶ kg). Particle masses at the subatomic scale are routinely expressed in MeV/c² or GeV/c² - the proton mass is 938.3 MeV/c², and the electron is 0.511 MeV/c². The Higgs boson, discovered at CERN in 2012, has a mass of approximately 125.25 GeV/c². This unit is exclusively used in high-energy physics and quantum field theory, where conventional mass units like grams would require impossibly small exponents.
About Quarters
A quarter (qr) in the avoirdupois system equals 28 pounds or one quarter of a hundredweight - approximately 12.70 kg. Historically, quarters were used in British trade for measuring grain, wool, and other bulk commodities. The British quarter of grain (28 lb) was the standard purchase quantity at markets and mills throughout medieval and early modern England. In the US, the term 'quarter' sometimes refers to a quarter of a short hundredweight (25 lb) rather than the British 28 lb.
Quick Reference Table
| Electronvolt mass (eV/c²) | Quarters (qr) |
|---|---|
| 1 eV/c² | 1.404 × 10-37 qr |
| 2 eV/c² | 2.807 × 10-37 qr |
| 5 eV/c² | 7.018 × 10-37 qr |
| 10 eV/c² | 1.404 × 10-36 qr |
| 25 eV/c² | 3.509 × 10-36 qr |
| 50 eV/c² | 7.018 × 10-36 qr |
| 100 eV/c² | 1.404 × 10-35 qr |