Ounces to Pennyweights (oz → dwt)
Formula
1 oz = 18.229166666666668 dwtConversion Table
| oz | dwt |
|---|---|
| 0 | 0 |
| 1.0000 | 18.229 |
| 2.0000 | 36.458 |
| 3.0000 | 54.688 |
| 4.0000 | 72.917 |
| 5.0000 | 91.146 |
| 6.0000 | 109.38 |
| 7.0000 | 127.60 |
| 8.0000 | 145.83 |
| 9.0000 | 164.06 |
| 10.000 | 182.29 |
| 11.000 | 200.52 |
| 12.000 | 218.75 |
| 13.000 | 236.98 |
| 14.000 | 255.21 |
| 15.000 | 273.44 |
| 16.000 | 291.67 |
| 17.000 | 309.90 |
| 18.000 | 328.13 |
| 19.000 | 346.35 |
| oz | dwt |
|---|---|
| 20.000 | 364.58 |
| 21.000 | 382.81 |
| 22.000 | 401.04 |
| 23.000 | 419.27 |
| 24.000 | 437.50 |
| 25.000 | 455.73 |
| 26.000 | 473.96 |
| 27.000 | 492.19 |
| 28.000 | 510.42 |
| 29.000 | 528.65 |
| 30.000 | 546.88 |
| 31.000 | 565.10 |
| 32.000 | 583.33 |
| 33.000 | 601.56 |
| 34.000 | 619.79 |
| 35.000 | 638.02 |
| 36.000 | 656.25 |
| 37.000 | 674.48 |
| 38.000 | 692.71 |
| 39.000 | 710.94 |
| oz | dwt |
|---|---|
| 40.000 | 729.17 |
| 41.000 | 747.40 |
| 42.000 | 765.63 |
| 43.000 | 783.85 |
| 44.000 | 802.08 |
| 45.000 | 820.31 |
| 46.000 | 838.54 |
| 47.000 | 856.77 |
| 48.000 | 875.00 |
| 49.000 | 893.23 |
| 50.000 | 911.46 |
| 51.000 | 929.69 |
| 52.000 | 947.92 |
| 53.000 | 966.15 |
| 54.000 | 984.38 |
| 55.000 | 1,002.6 |
| 56.000 | 1,020.8 |
| 57.000 | 1,039.1 |
| 58.000 | 1,057.3 |
| 59.000 | 1,075.5 |
| oz | dwt |
|---|---|
| 60.000 | 1,093.8 |
| 61.000 | 1,112.0 |
| 62.000 | 1,130.2 |
| 63.000 | 1,148.4 |
| 64.000 | 1,166.7 |
| 65.000 | 1,184.9 |
| 66.000 | 1,203.1 |
| 67.000 | 1,221.4 |
| 68.000 | 1,239.6 |
| 69.000 | 1,257.8 |
| 70.000 | 1,276.0 |
| 71.000 | 1,294.3 |
| 72.000 | 1,312.5 |
| 73.000 | 1,330.7 |
| 74.000 | 1,349.0 |
| 75.000 | 1,367.2 |
| 76.000 | 1,385.4 |
| 77.000 | 1,403.6 |
| 78.000 | 1,421.9 |
| 79.000 | 1,440.1 |
Ounces to Pennyweights Conversion
Converting Ounces (oz) to Pennyweights (dwt) is a common weight conversion. 1 oz equals 18.229167 dwt. For example, 100 oz is equal to 1,822.916667 dwt.
Quick Mental Math: Ounces to Pennyweights
Multiply by approximately 18.2 to convert ounces to pennyweights.
Why is converting Ounces to Pennyweights tricky?
The conversion factor is not intuitive or memorable.
Quick Reference Values
1 oz = 18.229167 dwt. 5 oz = 91.145833 dwt. 10 oz = 182.291667 dwt. 25 oz = 455.729167 dwt. 50 oz = 911.458333 dwt. 100 oz = 1,822.916667 dwt.
What is Ounces?
Ounces (oz) is a unit of weight. An ounce (oz) is a unit of mass primarily used in the United States and UK customary systems. One avoirdupois ounce equals exactly 28.349523125 grams as defined by NIST. This measure is commonly employed in food labeling, postal services, and retail [nist-sp-811]. The ounce originated from the Roman 'uncia,' a twelfth part of the Roman pound. The avoirdupois ounce was standardized in the 19th century by the international yard and pound agreement of 1959 to unify US and British definitions [nist-sp-811]. Ounces are widely used in the US for weight measurement in grocery, postal, and manufacturing sectors. The UK uses ounces in certain contexts like precious metals and food portions. Most other countries prefer grams and kilograms per SI [nist-sp-811].
What is Pennyweights?
Pennyweights (dwt) is a unit of weight. A pennyweight (dwt) is a unit of mass equal to 1.55517384 grams exactly. It is defined as one-twentieth of a troy ounce, making it 1/240th of a pound in the troy weight system used for precious metals [nist-si-guide]. The pennyweight is primarily used in the jewelry and precious metals industries for measuring small quantities of gold, silver, and gemstones. The pennyweight originated in medieval England as part of the troy weight system standardized in the 15th century. It was formally adopted for use in precious metals trades to provide consistent mass measurements [nist-si-guide]. Pennyweights remain in use primarily in the United States and the United Kingdom within jewelry, bullion trading, and pawn industries. International standards bodies acknowledge it as a non-SI unit still relevant in specific sectors [bipm-si-brochure].
Common Misspellings
People often search for this conversion using these alternate spellings: ounce, ounze, onze, ounch, ounz, penny weight, pennywight, pennywate, penyweight. All of these refer to the Ounces to Pennyweights conversion.