Mass and Weight · Unit Converter

Convert Atomic Mass Unit to Stone (UK)

Convert atomic mass unit to stones (uk) instantly. 1 atomic mass unit = 2.614903e-28 stone (uk) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Stone (UK) to Atomic Mass Unit 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 June 10, 2026 Last reviewed June 10, 2026 Updated June 10, 2026

Units explained

Scientific / Atomic

Atomic Mass Unit

What is a atomic mass unit?

One unified atomic mass unit (u) is defined as 1/12 the mass of a carbon-12 atom, about 1.6605E-27 kg.

Origin of the atomic mass unit

Introduced to give atomic and molecular masses convenient numerical values.

Where it is used

Atomic, molecular, and nuclear physics and chemistry.

When and where it was developed

The unified (carbon-12) scale was adopted by IUPAC and IUPAP in 1960-1961.

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.

Atomic Mass Unit to Stone (UK) conversion formula

The relationship between atomic mass unit and stones (uk):

1 u = 2.614903e-28 st

1 st = 3.824233e+27 u

To convert atomic mass unit to stones (uk), multiply the value in atomic mass unit by 2.614903e-28. To reverse, multiply stones (uk) by 3.824233e+27.

How to use this converter

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

Step-by-step: convert atomic mass unit to stones (uk)

Write down the value in atomic mass unit (u).
Multiply that value by the factor 2.614903e-28.
The product is the equivalent value in stones (uk) (st).
To reverse, multiply the stone (uk) value by 3.824233e+27.

Worked examples

Example 1 — Convert 1 u to st:
1 × 2.614903e-28 = 2.614903e-28 st

Example 2 — Convert 100 u to st:
100 × 2.614903e-28 = 2.614903e-26 st

Real-world example — Bridging nine orders of magnitude

500 million atomic mass unit equals a value comfortably in the human-scale stones (uk) range. Physics problems that span this gap are common when comparing the wavelength of light to the path length of an experiment.

5e+8 u × 2.614903e-28 = 1.307452e-19 st

Real-world example — From sub-micron to human scale

One billion atomic mass unit equals one stone (uk) — the conversion that drives home the gulf between atomic-scale features and everyday objects in physics curricula.

1e+9 u × 2.614903e-28 = 2.614903e-19 st

Atomic Mass Unit to Stone (UK) conversion table

Standard reference values for converting atomic mass unit to stones (uk):

Atomic Mass Unit [u]	Stone (UK) [st]
0.01	2.614903e-30
0.1	2.614903e-29
1	2.614903e-28
2	5.229806e-28
3	7.84471e-28
4	1.045961e-27
5	1.307452e-27
10	2.614903e-27
20	5.229806e-27
30	7.84471e-27
40	1.045961e-26
50	1.307452e-26
100	2.614903e-26
500	1.307452e-25
1000	2.614903e-25

Frequently asked questions

How many stones (uk) is 1 atomic mass unit?

1 atomic mass unit equals 2.614903e-28 stone (uk).

How do I convert atomic mass unit to stones (uk)?

Multiply the value in atomic mass unit by 2.614903e-28 to get stones (uk).

How do I convert stones (uk) back to atomic mass unit?

Multiply the value in stones (uk) by 3.824233e+27, or use the Stone (UK) to Atomic Mass Unit converter.

How many stones (uk) is 100 atomic mass unit?

100 atomic mass unit equals 2.614903e-26 stones (uk), because 100 × 2.614903e-28 = 2.614903e-26.

Convert Atomic Mass Unit to other weight units

Show all Atomic Mass Unit conversions

Metric / SI (18 units)

Avoirdupois (15 units)

Troy & Apothecary (10 units)

Atomic Mass Unit to Point (1/100 carat) (pt) Atomic Mass Unit to Carat (metric) (ct) Atomic Mass Unit to Scruple (apothecary) (s ap) Atomic Mass Unit to Pennyweight (dwt) Atomic Mass Unit to Momme (mom) Atomic Mass Unit to Mace (mace) Atomic Mass Unit to Dram (apothecary/troy) (dr ap) Atomic Mass Unit to Troy Ounce (oz t) Atomic Mass Unit to Tael (tael) Atomic Mass Unit to Pound (troy/apothecary) (lb t)

Indian / South Asian (6 units)

Atomic Mass Unit to Ratti (ratti) Atomic Mass Unit to Masha (masha) Atomic Mass Unit to Tola (tola) Atomic Mass Unit to Chittack (Chatank) (chittack) Atomic Mass Unit to Seer (Ser) (seer) Atomic Mass Unit to Maund (Mann) (maund)

Scientific / Atomic (8 units)

Atomic Mass Unit to Electron Mass (rest) (me) Atomic Mass Unit to MeV/c2 (MeV/c²) Atomic Mass Unit to Muon Mass (mµ) Atomic Mass Unit to Proton Mass (mp) Atomic Mass Unit to Neutron Mass (mn) Atomic Mass Unit to Deuteron Mass (md) Atomic Mass Unit to Carbon-12 Atom Mass (C-12) Atomic Mass Unit to Planck Mass (mP)

Astronomical (4 units)

Atomic Mass Unit to Lunar Mass (Moon) (M☾) Atomic Mass Unit to Earth's Mass (M⊕) Atomic Mass Unit to Jupiter Mass (MJ) Atomic Mass Unit to Sun's Mass (M☉)

Biblical / Ancient (14 units)

Force / Engineering (5 units)

Atomic Mass Unit to Poundal (pdl) Atomic Mass Unit to Ton (assay) (US) (AT) Atomic Mass Unit to Ton (assay) (UK) (AT) Atomic Mass Unit to Kilogram-force square second/meter (hyl) Atomic Mass Unit to Slug (slug)

Sources & references

Conversion factor (1 u = 2.614903e-28 st) verified against the following authoritative sources:

BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.

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