Mass and Weight · Unit Converter

Convert Dram (avoirdupois) to Planck Mass

Convert drams (avoirdupois) to planck mass instantly. 1 dram (avoirdupois) = 81400.1497673094 planck mass — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Planck Mass to Dram (avoirdupois) 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

Dram (avoirdupois)

What is a dram (avoirdupois)?

The avoirdupois dram (dr) equals one-sixteenth of an ounce, about 1.77 grams.

Origin of the dram (avoirdupois)

From Greek 'drachma' through Latin 'dragma'.

Where it is used

Historically pharmacy; today occasional cooking and firearms (powder) use.

When and where it was developed

Defined as 1/256 of the avoirdupois pound.

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.

Dram (avoirdupois) 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 drams (avoirdupois) and planck mass:

1 dr = 81400.1497673094 mP
1 mP = 1.228499e-5 dr

To convert drams (avoirdupois) to planck mass, multiply the value in drams (avoirdupois) by 81400.1497673094. To reverse, multiply planck mass by 1.228499e-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 Dram (avoirdupois) converter for the reverse direction.

Step-by-step: convert drams (avoirdupois) to planck mass

  1. Write down the value in drams (avoirdupois) (dr).
  2. Multiply that value by the factor 81400.1497673094.
  3. The product is the equivalent value in planck mass (mP).
  4. To reverse, multiply the planck mass value by 1.228499e-5.

Worked examples

Example 1 — Convert 1 dr to mP:
1 × 81400.1497673094 = 81400.1497673094 mP

Example 2 — Convert 100 dr to mP:
100 × 81400.1497673094 = 8140014.9767309381 mP

Real-world example — Centimeter to wavelength scale

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

1 dr × 81400.1497673094 = 81400.1497673094 mP

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

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

1 dr × 81400.1497673094 = 81400.1497673094 mP

Dram (avoirdupois) to Planck Mass conversion table

Standard reference values for converting drams (avoirdupois) to planck mass:

Dram (avoirdupois) [dr]Planck Mass [mP]
0.01814.0014976731
0.18140.0149767309
181400.1497673094
2162800.2995346188
3244200.4493019282
4325600.5990692375
5407000.7488365469
10814001.4976730938
201628002.9953461876
302442004.4930192814
403256005.9906923752
504070007.488365469
1008140014.9767309381
5004.070007e+7
10008.140015e+7

Frequently asked questions

How many planck mass is 1 dram (avoirdupois)?
1 dram (avoirdupois) equals 81400.1497673094 planck mass.
How do I convert drams (avoirdupois) to planck mass?
Multiply the value in drams (avoirdupois) by 81400.1497673094 to get planck mass.
How do I convert planck mass back to drams (avoirdupois)?
Multiply the value in planck mass by 1.228499e-5, or use the Planck Mass to Dram (avoirdupois) converter.
How many planck mass is 100 drams (avoirdupois)?
100 drams (avoirdupois) equals 8140014.9767309381 planck mass, because 100 × 81400.1497673094 = 8140014.9767309381.

Convert Dram (avoirdupois) to other weight units

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

Sources & references

Conversion factor (1 dr = 81400.1497673094 mP) verified against the following authoritative sources:

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