Mass and Weight · Unit Converter

Convert Stone (US) to Poundal

Convert stones (us) to poundals instantly. 1 stone (us) = 402.4999990062 poundal — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Poundal to Stone (US) 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

Stone (US)

What is a stone (us)?

A less common US definition of the stone, about 5.67 kilograms.

Origin of the stone (us)

A variant stone weight used in some historical US trade.

Where it is used

Rare; appears mainly in historical or specialized contexts.

When and where it was developed

Derived from older English stone weights that varied by commodity.

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.

Stone (US) to Poundal conversion formula

The relationship between stones (us) and poundals:

1 st = 402.4999990062 pdl
1 pdl = 0.0024844721 st

To convert stones (us) to poundals, multiply the value in stones (us) by 402.4999990062. To reverse, multiply poundals by 0.0024844721.

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 Stone (US) converter for the reverse direction.

Step-by-step: convert stones (us) to poundals

  1. Write down the value in stones (us) (st).
  2. Multiply that value by the factor 402.4999990062.
  3. The product is the equivalent value in poundals (pdl).
  4. To reverse, multiply the poundal value by 0.0024844721.

Worked examples

Example 1 — Convert 1 st to pdl:
1 × 402.4999990062 = 402.4999990062 pdl

Example 2 — Convert 100 st to pdl:
100 × 402.4999990062 = 40249.9999006156 pdl

Real-world example — Pet and accessory dimensions

A 3-stone (us) dog leash equals a tidy round value in poundals. Pet-supply shopping frequently mixes the two units across product specifications.

3 st × 402.4999990062 = 1207.4999970185 pdl

Real-world example — Fabric and tailoring

One stone (us) of fabric converts to a value in poundals commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.

1 st × 402.4999990062 = 402.4999990062 pdl

Real-world example — Body height conversion (reverse direction)

You measure 1.75 stones (us) tall and need to fill in a gym membership form or medical record that asks for height in poundals. This is the most-used everyday length conversion in metric-using countries.

1.75 st × 402.4999990062 = 704.3749982608 pdl

Stone (US) to Poundal conversion table

Standard reference values for converting stones (us) to poundals:

Stone (US) [st]Poundal [pdl]
0.014.0249999901
0.140.2499999006
1402.4999990062
2804.9999980123
31207.4999970185
41609.9999960246
52012.4999950308
104024.9999900616
208049.9999801231
3012074.9999701847
4016099.9999602462
5020124.9999503078
10040249.9999006156
500201249.9995030781
1000402499.9990061562

Frequently asked questions

How many poundals is 1 stone (us)?
1 stone (us) equals 402.4999990062 poundal.
How do I convert stones (us) to poundals?
Multiply the value in stones (us) by 402.4999990062 to get poundals.
How do I convert poundals back to stones (us)?
Multiply the value in poundals by 0.0024844721, or use the Poundal to Stone (US) converter.
How many poundals is 100 stones (us)?
100 stones (us) equals 40249.9999006156 poundals, because 100 × 402.4999990062 = 40249.9999006156.

Convert Stone (US) to other weight units

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

Sources & references

Conversion factor (1 st = 402.4999990062 pdl) verified against the following authoritative sources:

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