Mass and Weight · Unit Converter

Convert Slug to Proton Mass

Convert slugs to proton mass instantly. 1 slug = 8.725159e+27 proton mass — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Proton Mass to Slug converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Force / Engineering

Slug

What is a slug?

The slug is the mass that accelerates at 1 ft/s^2 under a force of one pound-force, about 14.59 kg.

Origin of the slug

Coined in the early 20th century for the British gravitational (engineering) system.

Where it is used

US and British engineering dynamics.

When and where it was developed

Introduced in the British gravitational system of units.

Scientific / Atomic

Proton Mass

What is a proton mass?

The proton rest mass is about 1.6726E-27 kg.

Origin of the proton mass

The mass of the proton, the positively charged nucleon.

Where it is used

Nuclear and particle physics, and chemistry.

When and where it was developed

Quantified after Rutherford identified the proton around 1917-1920.

Slug to Proton Mass conversion formula

Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.

The relationship between slugs and proton mass:

1 slug = 8.725159e+27 mp
1 mp = 1.146111e-28 slug

To convert slugs to proton mass, multiply the value in slugs by 8.725159e+27. To reverse, multiply proton mass by 1.146111e-28.

How to use this converter

Type a value into the calculator. The result in proton mass updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Proton Mass to Slug converter for the reverse direction.

Step-by-step: convert slugs to proton mass

  1. Write down the value in slugs (slug).
  2. Multiply that value by the factor 8.725159e+27.
  3. The product is the equivalent value in proton mass (mp).
  4. To reverse, multiply the proton mass value by 1.146111e-28.

Worked examples

Example 1 — Convert 1 slug to mp:
1 × 8.725159e+27 = 8.725159e+27 mp

Example 2 — Convert 100 slug to mp:
100 × 8.725159e+27 = 8.725159e+29 mp

Slug to Proton Mass conversion table

Standard reference values for converting slugs to proton mass:

Slug [slug]Proton Mass [mp]
0.018.725159e+25
0.18.725159e+26
18.725159e+27
21.745032e+28
32.617548e+28
43.490064e+28
54.36258e+28
108.725159e+28
201.745032e+29
302.617548e+29
403.490064e+29
504.36258e+29
1008.725159e+29
5004.36258e+30
10008.725159e+30

Frequently asked questions

How many proton mass is 1 slug?
1 slug equals 8.725159e+27 proton mass.
How do I convert slugs to proton mass?
Multiply the value in slugs by 8.725159e+27 to get proton mass.
How do I convert proton mass back to slugs?
Multiply the value in proton mass by 1.146111e-28, or use the Proton Mass to Slug converter.
How many proton mass is 100 slugs?
100 slugs equals 8.725159e+29 proton mass, because 100 × 8.725159e+27 = 8.725159e+29.

Convert Slug to other weight units

Show all Slug conversions
Metric / SI (18 units)
Slug to Attogram (ag) Slug to Femtogram (fg) Slug to Picogram (pg) Slug to Nanogram (ng) Slug to Microgram (µg) Slug to Milligram (mg) Slug to Centigram (cg) Slug to Decigram (dg) Slug to Gram (g) Slug to Dekagram (dag) Slug to Hectogram (hg) Slug to Kilogram (kg) Slug to Quintal (metric) (q) Slug to Metric Ton (t) Slug to Gigagram (Gg) Slug to Teragram (Tg) Slug to Petagram (Pg) Slug to Exagram (Eg)
Avoirdupois (15 units)
Slug to Grain (gr) Slug to Dram (avoirdupois) (dr) Slug to Ounce (oz) Slug to Pound (lb) Slug to Clove (clove) Slug to Stone (US) (st) Slug to Stone (UK) (st) Slug to Quarter (US) (qr) Slug to Quarter (UK) (qr) Slug to Hundredweight (US) (cwt) Slug to Hundredweight (UK) (cwt) Slug to Wey (wey) Slug to Kilopound (kip) (kip) Slug to Ton (short, US) (sh tn) Slug to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Slug to Point (1/100 carat) (pt) Slug to Carat (metric) (ct) Slug to Scruple (apothecary) (s ap) Slug to Pennyweight (dwt) Slug to Momme (mom) Slug to Mace (mace) Slug to Dram (apothecary/troy) (dr ap) Slug to Troy Ounce (oz t) Slug to Tael (tael) Slug to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Slug to Ratti (ratti) Slug to Masha (masha) Slug to Tola (tola) Slug to Chittack (Chatank) (chittack) Slug to Seer (Ser) (seer) Slug to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Slug to Electron Mass (rest) (me) Slug to MeV/c2 (MeV/c²) Slug to Muon Mass (mµ) Slug to Atomic Mass Unit (u) Slug to Proton Mass (mp) Slug to Neutron Mass (mn) Slug to Deuteron Mass (md) Slug to Carbon-12 Atom Mass (C-12) Slug to Planck Mass (mP)
Astronomical (4 units)
Slug to Lunar Mass (Moon) (M☾) Slug to Earth's Mass (M⊕) Slug to Jupiter Mass (MJ) Slug to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Slug to Lepton (Biblical Roman) (lepton) Slug to Quadrans (Biblical Roman) (quadrans) Slug to Assarion (Biblical Roman) (assarion) Slug to Gerah (Biblical Hebrew) (gerah) Slug to Drachma (Biblical Greek) (drachma) Slug to Denarius (Biblical Roman) (denarius) Slug to Bekan (Biblical Hebrew) (bekah) Slug to Didrachma (Biblical Greek) (didrachma) Slug to Shekel (Biblical Hebrew) (shekel) Slug to Tetradrachma (Biblical Greek) (tetra) Slug to Mina (Biblical Greek) (mina) Slug to Mina (Biblical Hebrew) (mina) Slug to Talent (Biblical Greek) (talent) Slug to Talent (Biblical Hebrew) (talent)
Force / Engineering (4 units)
Slug to Poundal (pdl) Slug to Ton (assay) (US) (AT) Slug to Ton (assay) (UK) (AT) Slug to Kilogram-force square second/meter (hyl)

Sources & references

Conversion factor (1 slug = 8.725159e+27 mp) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.