Convert avoirdupois ounces (oz) to troy ounces (oz t).
Mass converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
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
0.9114583333
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
CONVERSION
1 oz ≈ 0.9114583333 oz t
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAoz t = oz × 0.911458333333333
FORMULA & EXAMPLES
How to convert Avoirdupois ounces to troy ounces
oz t = oz × 0.911458333333333
Multiply the oz reading by 0.911458333333333.
Worked examples
1 oz ≈ 0.9114583333 oz t
1 × 0.911458333333333 ≈ 0.9114583333
16 oz ≈ 14.58333333 oz t
16 × 0.911458333333333 ≈ 14.58333333
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.
Avoirdupois ounces to troy ounces table
Fixed reference · Ounce to Troy ounce
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
Ounce (oz)
Troy ounce (oz t)
0
0
0.1
0.09114583333
0.5
0.4557291667
1
0.9114583333
2
1.822916667
5
4.557291667
10
9.114583333
25
22.78645833
50
45.57291667
100
91.14583333
1000
911.4583333
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.