Troy Ounces to Pennyweights

This tool converts values from troy ounces to pennyweights. Convert troy ounces to pennyweights instantly with accurate unit factors. Whether you’re working with scientific data, engineering specs, or everyday measurements, it gives you the exact answer instantly.

Quick calculators for the math that shouldn’t need a notepad — instant, accurate, private to your browser. The Troy Ounces to Pennyweights sits in that toolkit — it convert troy ounces to pennyweights instantly with accurate unit factors. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

Where

value_in_troy_ounce

The number of troy ounces you start with (the value you enter above)

value_in_pennyweight

The equivalent number of pennyweights (the result)

factor

The exact conversion ratio — 20 — anchored to SI definitions, not rounded

1. 01Look up the SI factors: 1 troy ounce = 0.0311034768 base units, 1 pennyweight = 0.00155517384 base units.
2. 02Divide to get the conversion ratio: 0.0311034768 / 0.00155517384 = 20.
3. 03Multiply by the quantity: 5 × 20 = 100.
4. 04So 5 troy ounces = 100 pennyweights.

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.