Mass and Weight · Unit Converter

Convert Pennyweight to Planck Mass

Convert pennyweights to planck mass instantly. 1 pennyweight = 71446.0722834002 planck mass — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Planck Mass to Pennyweight 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

Troy & Apothecary

Pennyweight

What is a pennyweight?

The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).

Origin of the pennyweight

From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.

Where it is used

Jewelry making and precious-metal scrap valuation in the US.

When and where it was developed

Derived from the medieval English coinage system.

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.

Pennyweight 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 pennyweights and planck mass:

1 dwt = 71446.0722834002 mP
1 mP = 1.399657e-5 dwt

To convert pennyweights to planck mass, multiply the value in pennyweights by 71446.0722834002. To reverse, multiply planck mass by 1.399657e-5.

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 Pennyweight converter for the reverse direction.

Step-by-step: convert pennyweights to planck mass

  1. Write down the value in pennyweights (dwt).
  2. Multiply that value by the factor 71446.0722834002.
  3. The product is the equivalent value in planck mass (mP).
  4. To reverse, multiply the planck mass value by 1.399657e-5.

Worked examples

Example 1 — Convert 1 dwt to mP:
1 × 71446.0722834002 = 71446.0722834002 mP

Example 2 — Convert 100 dwt to mP:
100 × 71446.0722834002 = 7144607.2283400176 mP

Real-world example — Centimeter to wavelength scale

One pennyweight equals 10 million planck mass. Physics curricula use this kind of conversion to relate everyday measurements to atomic and optical scales.

1 dwt × 71446.0722834002 = 71446.0722834002 mP

Real-world example — Small-scale to atomic-scale

One pennyweight equals 10 million planck mass — useful for physics curricula that relate everyday measurements to atomic and optical scales.

1 dwt × 71446.0722834002 = 71446.0722834002 mP

Pennyweight to Planck Mass conversion table

Standard reference values for converting pennyweights to planck mass:

Pennyweight [dwt]Planck Mass [mP]
0.01714.460722834
0.17144.60722834
171446.0722834002
2142892.1445668004
3214338.2168502006
4285784.2891336007
5357230.3614170009
10714460.7228340018
201428921.4456680035
302143382.1685020053
402857842.891336007
503572303.6141700088
1007144607.2283400176
5003.572304e+7
10007.144607e+7

Frequently asked questions

How many planck mass is 1 pennyweight?
1 pennyweight equals 71446.0722834002 planck mass.
How do I convert pennyweights to planck mass?
Multiply the value in pennyweights by 71446.0722834002 to get planck mass.
How do I convert planck mass back to pennyweights?
Multiply the value in planck mass by 1.399657e-5, or use the Planck Mass to Pennyweight converter.
How many planck mass is 100 pennyweights?
100 pennyweights equals 7144607.2283400176 planck mass, because 100 × 71446.0722834002 = 7144607.2283400176.

Convert Pennyweight to other weight units

Show all Pennyweight conversions
Metric / SI (18 units)
Pennyweight to Attogram (ag) Pennyweight to Femtogram (fg) Pennyweight to Picogram (pg) Pennyweight to Nanogram (ng) Pennyweight to Microgram (µg) Pennyweight to Milligram (mg) Pennyweight to Centigram (cg) Pennyweight to Decigram (dg) Pennyweight to Gram (g) Pennyweight to Dekagram (dag) Pennyweight to Hectogram (hg) Pennyweight to Kilogram (kg) Pennyweight to Quintal (metric) (q) Pennyweight to Metric Ton (t) Pennyweight to Gigagram (Gg) Pennyweight to Teragram (Tg) Pennyweight to Petagram (Pg) Pennyweight to Exagram (Eg)
Avoirdupois (15 units)
Pennyweight to Grain (gr) Pennyweight to Dram (avoirdupois) (dr) Pennyweight to Ounce (oz) Pennyweight to Pound (lb) Pennyweight to Clove (clove) Pennyweight to Stone (US) (st) Pennyweight to Stone (UK) (st) Pennyweight to Quarter (US) (qr) Pennyweight to Quarter (UK) (qr) Pennyweight to Hundredweight (US) (cwt) Pennyweight to Hundredweight (UK) (cwt) Pennyweight to Wey (wey) Pennyweight to Kilopound (kip) (kip) Pennyweight to Ton (short, US) (sh tn) Pennyweight to Ton (long, UK) (long tn)
Troy & Apothecary (9 units)
Pennyweight to Point (1/100 carat) (pt) Pennyweight to Carat (metric) (ct) Pennyweight to Scruple (apothecary) (s ap) Pennyweight to Momme (mom) Pennyweight to Mace (mace) Pennyweight to Dram (apothecary/troy) (dr ap) Pennyweight to Troy Ounce (oz t) Pennyweight to Tael (tael) Pennyweight to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Pennyweight to Ratti (ratti) Pennyweight to Masha (masha) Pennyweight to Tola (tola) Pennyweight to Chittack (Chatank) (chittack) Pennyweight to Seer (Ser) (seer) Pennyweight to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Pennyweight to Electron Mass (rest) (me) Pennyweight to MeV/c2 (MeV/c²) Pennyweight to Muon Mass (mµ) Pennyweight to Atomic Mass Unit (u) Pennyweight to Proton Mass (mp) Pennyweight to Neutron Mass (mn) Pennyweight to Deuteron Mass (md) Pennyweight to Carbon-12 Atom Mass (C-12) Pennyweight to Planck Mass (mP)
Astronomical (4 units)
Pennyweight to Lunar Mass (Moon) (M☾) Pennyweight to Earth's Mass (M⊕) Pennyweight to Jupiter Mass (MJ) Pennyweight to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Pennyweight to Lepton (Biblical Roman) (lepton) Pennyweight to Quadrans (Biblical Roman) (quadrans) Pennyweight to Assarion (Biblical Roman) (assarion) Pennyweight to Gerah (Biblical Hebrew) (gerah) Pennyweight to Drachma (Biblical Greek) (drachma) Pennyweight to Denarius (Biblical Roman) (denarius) Pennyweight to Bekan (Biblical Hebrew) (bekah) Pennyweight to Didrachma (Biblical Greek) (didrachma) Pennyweight to Shekel (Biblical Hebrew) (shekel) Pennyweight to Tetradrachma (Biblical Greek) (tetra) Pennyweight to Mina (Biblical Greek) (mina) Pennyweight to Mina (Biblical Hebrew) (mina) Pennyweight to Talent (Biblical Greek) (talent) Pennyweight to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Pennyweight to Poundal (pdl) Pennyweight to Ton (assay) (US) (AT) Pennyweight to Ton (assay) (UK) (AT) Pennyweight to Kilogram-force square second/meter (hyl) Pennyweight to Slug (slug)

Sources & references

Conversion factor (1 dwt = 71446.0722834002 mP) verified against the following authoritative sources:

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