Mass and Weight · Unit Converter

Convert Stone (UK) to Grain

Convert stones (uk) to grains instantly. 1 stone (uk) = 98000.0151237135 grain — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Grain to Stone (UK) 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 (UK)

What is a stone (uk)?

The UK stone (st) equals 14 pounds, about 6.35 kilograms.

Origin of the stone (uk)

From standardized market 'stones' once used for weighing goods.

Where it is used

Body weight in the United Kingdom and Ireland.

When and where it was developed

Fixed at 14 pounds by British statute in 1835.

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.

Stone (UK) to Grain conversion formula

The relationship between stones (uk) and grains:

1 st = 98000.0151237135 gr
1 gr = 1.020408e-5 st

To convert stones (uk) to grains, multiply the value in stones (uk) by 98000.0151237135. To reverse, multiply grains by 1.020408e-5.

How to use this converter

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

Step-by-step: convert stones (uk) to grains

  1. Write down the value in stones (uk) (st).
  2. Multiply that value by the factor 98000.0151237135.
  3. The product is the equivalent value in grains (gr).
  4. To reverse, multiply the grain value by 1.020408e-5.

Worked examples

Example 1 — Convert 1 st to gr:
1 × 98000.0151237135 = 98000.0151237135 gr

Example 2 — Convert 100 st to gr:
100 × 98000.0151237135 = 9800001.5123713538 gr

Real-world example — Sub-meter precision

A 0.001-stone (uk) (1 mm) tolerance equals 1,000 grains — useful for surface-finish specs, where macro-scale dimensions are given in the larger unit but feature roughness in the smaller.

0.001 st × 98000.0151237135 = 98.0000151237 gr

Real-world example — Macro-to-micro scale comparison

2 stones (uk) of measurement converts to a very large number in grains — useful in materials science when comparing bulk-sample dimensions to feature-level surface specs.

2 st × 98000.0151237135 = 196000.0302474271 gr

Real-world example — Macroscopic to microscopic

One stone (uk) equals a million grains. Optical engineers calculating coherence length compare macro-scale path lengths with micro-scale wavelength differences using exactly this conversion.

1 st × 98000.0151237135 = 98000.0151237135 gr

Stone (UK) to Grain conversion table

Standard reference values for converting stones (uk) to grains:

Stone (UK) [st]Grain [gr]
0.01980.0001512371
0.19800.0015123714
198000.0151237135
2196000.0302474271
3294000.0453711406
4392000.0604948541
5490000.0756185676
10980000.1512371353
201960000.3024742706
302940000.4537114059
403920000.6049485411
504900000.7561856769
1009800001.5123713538
5004.900001e+7
10009.800002e+7

Frequently asked questions

How many grains is 1 stone (uk)?
1 stone (uk) equals 98000.0151237135 grain.
How do I convert stones (uk) to grains?
Multiply the value in stones (uk) by 98000.0151237135 to get grains.
How do I convert grains back to stones (uk)?
Multiply the value in grains by 1.020408e-5, or use the Grain to Stone (UK) converter.
How many grains is 100 stones (uk)?
100 stones (uk) equals 9800001.5123713538 grains, because 100 × 98000.0151237135 = 9800001.5123713538.

Convert Stone (UK) to other weight units

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

Sources & references

Conversion factor (1 st = 98000.0151237135 gr) verified against the following authoritative sources:

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