Mass and Weight · Unit Converter

Convert Grain to Pound (troy/apothecary)

Convert grains to pounds (troy/apothecary) instantly. 1 grain = 0.0001736111 pound (troy/apothecary) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pound (troy/apothecary) to Grain 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

Grain

What is a grain?

The grain (gr) equals 1/7000 of an avoirdupois pound, about 64.8 milligrams.

Origin of the grain

Based on the nominal mass of a single barley grain.

Where it is used

Ammunition and bullet mass, archery, and historical pharmacy.

When and where it was developed

Standardized through the English avoirdupois system and retained in 1959.

Troy & Apothecary

Pound (troy/apothecary)

What is a pound (troy/apothecary)?

The troy (apothecary) pound equals 12 troy ounces, about 373.24 grams.

Origin of the pound (troy/apothecary)

Named for Troyes, France, a major medieval trade-fair town.

Where it is used

Historical pricing of precious metals; now largely superseded by the troy ounce.

When and where it was developed

Adopted as the English coinage standard under Henry VIII in 1528.

Grain to Pound (troy/apothecary) conversion formula

The relationship between grains and pounds (troy/apothecary):

1 gr = 0.0001736111 lb t
1 lb t = 5760.000888904 gr

To convert grains to pounds (troy/apothecary), multiply the value in grains by 0.0001736111. To reverse, multiply pounds (troy/apothecary) by 5760.000888904.

How to use this converter

Type a value into the calculator. The result in pounds (troy/apothecary) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pound (troy/apothecary) to Grain converter for the reverse direction.

Step-by-step: convert grains to pounds (troy/apothecary)

  1. Write down the value in grains (gr).
  2. Multiply that value by the factor 0.0001736111.
  3. The product is the equivalent value in pounds (troy/apothecary) (lb t).
  4. To reverse, multiply the pound (troy/apothecary) value by 5760.000888904.

Worked examples

Example 1 — Convert 1 gr to lb t:
1 × 0.0001736111 = 0.0001736111 lb t

Example 2 — Convert 100 gr to lb t:
100 × 0.0001736111 = 0.0173611084 lb t

Real-world example — Quarter-meter measurement reference

A 250,000-grain length equals 0.25 pounds (troy/apothecary) — useful for comparing supply-chain spec sheets where some lengths are quoted in the smaller unit and some in the larger.

250000 gr × 0.0001736111 = 43.4027710797 lb t

Real-world example — From microscopic to macroscopic

A million grains equals exactly one pound (troy/apothecary). This kind of conversion appears in microfluidics, where total channel length is given in pounds (troy/apothecary) but feature widths are in grains.

1000000 gr × 0.0001736111 = 173.6110843188 lb t

Real-world example — Macro-scale buildup

A million grains equals exactly one pound (troy/apothecary) — the conversion that bridges microscale features and macroscale objects in microfluidic, biomedical, and semiconductor packaging design.

1000000 gr × 0.0001736111 = 173.6110843188 lb t

Grain to Pound (troy/apothecary) conversion table

Standard reference values for converting grains to pounds (troy/apothecary):

Grain [gr]Pound (troy/apothecary) [lb t]
0.011.736111e-6
0.11.736111e-5
10.0001736111
20.0003472222
30.0005208333
40.0006944443
50.0008680554
100.0017361108
200.0034722217
300.0052083325
400.0069444434
500.0086805542
1000.0173611084
5000.0868055422
10000.1736110843

Frequently asked questions

How many pounds (troy/apothecary) is 1 grain?
1 grain equals 0.0001736111 pound (troy/apothecary).
How do I convert grains to pounds (troy/apothecary)?
Multiply the value in grains by 0.0001736111 to get pounds (troy/apothecary).
How do I convert pounds (troy/apothecary) back to grains?
Multiply the value in pounds (troy/apothecary) by 5760.000888904, or use the Pound (troy/apothecary) to Grain converter.
How many pounds (troy/apothecary) is 100 grains?
100 grains equals 0.0173611084 pounds (troy/apothecary), because 100 × 0.0001736111 = 0.0173611084.

Convert Grain to other weight units

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

Sources & references

Conversion factor (1 gr = 0.0001736111 lb t) verified against the following authoritative sources:

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