Mass and Weight · Unit Converter

Convert Dram (avoirdupois) to Poundal

Convert drams (avoirdupois) to poundals instantly. 1 dram (avoirdupois) = 0.12578125 poundal — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Poundal 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.

Force / Engineering

Poundal

What is a poundal?

The poundal (pdl) is the FPS absolute unit of force; its mass-equivalent on this scale is about 0.0141 kg.

Origin of the poundal

Defined in the foot-pound-second absolute system in the late 19th century.

Where it is used

Early 20th-century physics and engineering.

When and where it was developed

Introduced in the absolute FPS system as an alternative to gravitational units.

Dram (avoirdupois) to Poundal conversion formula

The relationship between drams (avoirdupois) and poundals:

1 dr = 0.12578125 pdl
1 pdl = 7.9503105576 dr

To convert drams (avoirdupois) to poundals, multiply the value in drams (avoirdupois) by 0.12578125. To reverse, multiply poundals by 7.9503105576.

How to use this converter

Type a value into the calculator. The result in poundals updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Poundal to Dram (avoirdupois) converter for the reverse direction.

Step-by-step: convert drams (avoirdupois) to poundals

  1. Write down the value in drams (avoirdupois) (dr).
  2. Multiply that value by the factor 0.12578125.
  3. The product is the equivalent value in poundals (pdl).
  4. To reverse, multiply the poundal value by 7.9503105576.

Worked examples

Example 1 — Convert 1 dr to pdl:
1 × 0.12578125 = 0.12578125 pdl

Example 2 — Convert 100 dr to pdl:
100 × 0.12578125 = 12.5781250022 pdl

Real-world example — Postcard and small-object dimensions

A postcard is about 5 drams (avoirdupois) wide. Converting to poundals is essential for international postal addressing forms that ask for dimensions in different units across countries.

5 dr × 0.12578125 = 0.6289062501 pdl

Real-world example — Ruler-scale measurements

A 30-dram (avoirdupois) school ruler converts cleanly to poundals — useful when buying a desk accessory from a retailer whose product specs use a different unit.

30 dr × 0.12578125 = 3.7734375007 pdl

Real-world example — Hardware-scale dimensions

A 10-dram (avoirdupois) fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between drams (avoirdupois) and poundals daily when mixing metric and imperial tools.

10 dr × 0.12578125 = 1.2578125002 pdl

Dram (avoirdupois) to Poundal conversion table

Standard reference values for converting drams (avoirdupois) to poundals:

Dram (avoirdupois) [dr]Poundal [pdl]
0.010.0012578125
0.10.012578125
10.12578125
20.2515625
30.3773437501
40.5031250001
50.6289062501
101.2578125002
202.5156250004
303.7734375007
405.0312500009
506.2890625011
10012.5781250022
50062.8906250111
1000125.7812500222

Frequently asked questions

How many poundals is 1 dram (avoirdupois)?
1 dram (avoirdupois) equals 0.12578125 poundal.
How do I convert drams (avoirdupois) to poundals?
Multiply the value in drams (avoirdupois) by 0.12578125 to get poundals.
How do I convert poundals back to drams (avoirdupois)?
Multiply the value in poundals by 7.9503105576, or use the Poundal to Dram (avoirdupois) converter.
How many poundals is 100 drams (avoirdupois)?
100 drams (avoirdupois) equals 12.5781250022 poundals, because 100 × 0.12578125 = 12.5781250022.

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 = 0.12578125 pdl) verified against the following authoritative sources:

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