Convert troy ounces (oz t) to avoirdupois ounces (oz).
Mass converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
oz t
Decimal
Stone + pounds
Whole stone; pounds from 0 to less than 14. Non-negative values.
esc
Kilogramkg
Gramg
Milligrammg
Microgramµg
Poundlb
Ounceoz
Stonest
Metric tonnet
US short tonton (US)
Imperial long tonton (UK)
Imperial hundredweightcwt (UK)
US hundredweightcwt (US)
Imperial quarterqr (UK)
Avoirdupois dramdr (av)
Graingr
Pennyweightdwt
Troy ounceoz t
Metric quintalq
No units found. Try a name or symbol.
Stone + pounds
1.097142857
oz
Decimal
Stone + pounds
Whole stone; pounds from 0 to less than 14. Non-negative values.
esc
Kilogramkg
Gramg
Milligrammg
Microgramµg
Poundlb
Ounceoz
Stonest
Metric tonnet
US short tonton (US)
Imperial long tonton (UK)
Imperial hundredweightcwt (UK)
US hundredweightcwt (US)
Imperial quarterqr (UK)
Avoirdupois dramdr (av)
Graingr
Pennyweightdwt
Troy ounceoz t
Metric quintalq
No units found. Try a name or symbol.
Stone + pounds
CONVERSION
1 oz t ≈ 1.097142857 oz
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAoz = oz t × 1.09714285714286
FORMULA & EXAMPLES
How to convert Troy ounces to avoirdupois ounces
oz = oz t × 1.09714285714286
Multiply the oz t reading by 1.09714285714286.
Worked examples
1 oz t ≈ 1.097142857 oz
1 × 1.09714285714286 ≈ 1.097142857
10 oz t ≈ 10.97142857 oz
10 × 1.09714285714286 ≈ 10.97142857
Frequently asked questions
Why are troy and avoirdupois ounces different?
A troy ounce is 480 grains, or 31.1034768 grams. An avoirdupois ounce is 28.349523125 grams. The same ounce count therefore represents different masses.
Troy ounces to avoirdupois ounces table
Fixed reference · Troy ounce to Ounce
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
Troy ounce (oz t)
Ounce (oz)
0
0
0.1
0.1097142857
0.5
0.5485714286
1
1.097142857
2
2.194285714
5
5.485714286
10
10.97142857
25
27.42857143
50
54.85714286
100
109.7142857
1000
1097.142857
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.