Mass and Weight · Unit Converter

Convert Ounce to Quarter (UK)

Convert ounces to quarters (uk) instantly. 1 ounce = 0.0022321429 quarter (uk) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Quarter (UK) to Ounce 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

Ounce

What is a ounce?

The (avoirdupois) ounce (oz) equals one-sixteenth of a pound, about 28.35 grams.

Origin of the ounce

From Latin 'uncia', meaning a twelfth part.

Where it is used

US food portions, postal weights, and boxing weight classes.

When and where it was developed

Standardized as 1/16 of the international pound from 1959.

Avoirdupois

Quarter (UK)

What is a quarter (uk)?

The UK quarter equals one-fourth of a long hundredweight, 28 pounds (about 12.7 kg).

Origin of the quarter (uk)

A 'quarter' of the hundredweight in the British imperial system.

Where it is used

Historical British trade in coal, grain, and agricultural goods.

When and where it was developed

Defined within the imperial hundredweight system.

Ounce to Quarter (UK) conversion formula

The relationship between ounces and quarters (uk):

1 oz = 0.0022321429 qr
1 qr = 448.0000003951 oz

To convert ounces to quarters (uk), multiply the value in ounces by 0.0022321429. To reverse, multiply quarters (uk) by 448.0000003951.

How to use this converter

Type a value into the calculator. The result in quarters (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 Quarter (UK) to Ounce converter for the reverse direction.

Step-by-step: convert ounces to quarters (uk)

  1. Write down the value in ounces (oz).
  2. Multiply that value by the factor 0.0022321429.
  3. The product is the equivalent value in quarters (uk) (qr).
  4. To reverse, multiply the quarter (uk) value by 448.0000003951.

Worked examples

Example 1 — Convert 1 oz to qr:
1 × 0.0022321429 = 0.0022321429 qr

Example 2 — Convert 100 oz to qr:
100 × 0.0022321429 = 0.2232142855 qr

Real-world example — Ruler-scale measurements

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

30 oz × 0.0022321429 = 0.0669642857 qr

Real-world example — Hardware-scale dimensions

A 10-ounce fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between ounces and quarters (uk) daily when mixing metric and imperial tools.

10 oz × 0.0022321429 = 0.0223214286 qr

Real-world example — Postcard and small-object dimensions

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

5 oz × 0.0022321429 = 0.0111607143 qr

Ounce to Quarter (UK) conversion table

Standard reference values for converting ounces to quarters (uk):

Ounce [oz]Quarter (UK) [qr]
0.012.232143e-5
0.10.0002232143
10.0022321429
20.0044642857
30.0066964286
40.0089285714
50.0111607143
100.0223214286
200.0446428571
300.0669642857
400.0892857142
500.1116071428
1000.2232142855
5001.1160714276
10002.2321428552

Frequently asked questions

How many quarters (uk) is 1 ounce?
1 ounce equals 0.0022321429 quarter (uk).
How do I convert ounces to quarters (uk)?
Multiply the value in ounces by 0.0022321429 to get quarters (uk).
How do I convert quarters (uk) back to ounces?
Multiply the value in quarters (uk) by 448.0000003951, or use the Quarter (UK) to Ounce converter.
How many quarters (uk) is 100 ounces?
100 ounces equals 0.2232142855 quarters (uk), because 100 × 0.0022321429 = 0.2232142855.

Convert Ounce to other weight units

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

Sources & references

Conversion factor (1 oz = 0.0022321429 qr) verified against the following authoritative sources:

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