Mass and Weight · Unit Converter

Convert Wey to Planck Mass

Convert weys to planck mass instantly. 1 wey = 5.251286e+9 planck mass — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Planck Mass to Wey 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

Avoirdupois

Wey

What is a wey?

The wey was an English bulk weight, here taken as 252 pounds (about 114.3 kg).

Origin of the wey

From Old English 'waege', a weighing or balance.

Where it is used

Obsolete English unit for wool, cheese, and salt.

When and where it was developed

Used in medieval and early-modern English trade.

Scientific / Atomic

Planck Mass

What is a planck mass?

The Planck mass equals about 2.18E-8 kg, formed from the constants h-bar, c, and G.

Origin of the planck mass

Introduced by Max Planck in 1899 as part of a system of natural units.

Where it is used

Theoretical physics and quantum-gravity research.

When and where it was developed

Defined by Planck in 1899 from fundamental constants.

Wey to Planck 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 weys and planck mass:

1 wey = 5.251286e+9 mP
1 mP = 1.904295e-10 wey

To convert weys to planck mass, multiply the value in weys by 5.251286e+9. To reverse, multiply planck mass by 1.904295e-10.

How to use this converter

Type a value into the calculator. The result in planck 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 Planck Mass to Wey converter for the reverse direction.

Step-by-step: convert weys to planck mass

  1. Write down the value in weys (wey).
  2. Multiply that value by the factor 5.251286e+9.
  3. The product is the equivalent value in planck mass (mP).
  4. To reverse, multiply the planck mass value by 1.904295e-10.

Worked examples

Example 1 — Convert 1 wey to mP:
1 × 5.251286e+9 = 5.251286e+9 mP

Example 2 — Convert 100 wey to mP:
100 × 5.251286e+9 = 5.251286e+11 mP

Wey to Planck Mass conversion table

Standard reference values for converting weys to planck mass:

Wey [wey]Planck Mass [mP]
0.015.251286e+7
0.15.251286e+8
15.251286e+9
21.050257e+10
31.575386e+10
42.100515e+10
52.625643e+10
105.251286e+10
201.050257e+11
301.575386e+11
402.100515e+11
502.625643e+11
1005.251286e+11
5002.625643e+12
10005.251286e+12

Frequently asked questions

How many planck mass is 1 wey?
1 wey equals 5.251286e+9 planck mass.
How do I convert weys to planck mass?
Multiply the value in weys by 5.251286e+9 to get planck mass.
How do I convert planck mass back to weys?
Multiply the value in planck mass by 1.904295e-10, or use the Planck Mass to Wey converter.
How many planck mass is 100 weys?
100 weys equals 5.251286e+11 planck mass, because 100 × 5.251286e+9 = 5.251286e+11.

Convert Wey to other weight units

Show all Wey conversions
Metric / SI (18 units)
Wey to Attogram (ag) Wey to Femtogram (fg) Wey to Picogram (pg) Wey to Nanogram (ng) Wey to Microgram (µg) Wey to Milligram (mg) Wey to Centigram (cg) Wey to Decigram (dg) Wey to Gram (g) Wey to Dekagram (dag) Wey to Hectogram (hg) Wey to Kilogram (kg) Wey to Quintal (metric) (q) Wey to Metric Ton (t) Wey to Gigagram (Gg) Wey to Teragram (Tg) Wey to Petagram (Pg) Wey to Exagram (Eg)
Avoirdupois (14 units)
Wey to Grain (gr) Wey to Dram (avoirdupois) (dr) Wey to Ounce (oz) Wey to Pound (lb) Wey to Clove (clove) Wey to Stone (US) (st) Wey to Stone (UK) (st) Wey to Quarter (US) (qr) Wey to Quarter (UK) (qr) Wey to Hundredweight (US) (cwt) Wey to Hundredweight (UK) (cwt) Wey to Kilopound (kip) (kip) Wey to Ton (short, US) (sh tn) Wey to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Wey to Point (1/100 carat) (pt) Wey to Carat (metric) (ct) Wey to Scruple (apothecary) (s ap) Wey to Pennyweight (dwt) Wey to Momme (mom) Wey to Mace (mace) Wey to Dram (apothecary/troy) (dr ap) Wey to Troy Ounce (oz t) Wey to Tael (tael) Wey to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Wey to Ratti (ratti) Wey to Masha (masha) Wey to Tola (tola) Wey to Chittack (Chatank) (chittack) Wey to Seer (Ser) (seer) Wey to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Wey to Electron Mass (rest) (me) Wey to MeV/c2 (MeV/c²) Wey to Muon Mass (mµ) Wey to Atomic Mass Unit (u) Wey to Proton Mass (mp) Wey to Neutron Mass (mn) Wey to Deuteron Mass (md) Wey to Carbon-12 Atom Mass (C-12) Wey to Planck Mass (mP)
Astronomical (4 units)
Wey to Lunar Mass (Moon) (M☾) Wey to Earth's Mass (M⊕) Wey to Jupiter Mass (MJ) Wey to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Wey to Lepton (Biblical Roman) (lepton) Wey to Quadrans (Biblical Roman) (quadrans) Wey to Assarion (Biblical Roman) (assarion) Wey to Gerah (Biblical Hebrew) (gerah) Wey to Drachma (Biblical Greek) (drachma) Wey to Denarius (Biblical Roman) (denarius) Wey to Bekan (Biblical Hebrew) (bekah) Wey to Didrachma (Biblical Greek) (didrachma) Wey to Shekel (Biblical Hebrew) (shekel) Wey to Tetradrachma (Biblical Greek) (tetra) Wey to Mina (Biblical Greek) (mina) Wey to Mina (Biblical Hebrew) (mina) Wey to Talent (Biblical Greek) (talent) Wey to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Wey to Poundal (pdl) Wey to Ton (assay) (US) (AT) Wey to Ton (assay) (UK) (AT) Wey to Kilogram-force square second/meter (hyl) Wey to Slug (slug)

Sources & references

Conversion factor (1 wey = 5.251286e+9 mP) verified against the following authoritative sources:

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