You can measure rough inflation by:

1. Take the price of gold in 1913 which was $20 per Troy Ounce (eg $20 gold Double Eagle is one Troy Ounce)

2. Take the current price of gold [gold-price] ($1,100 at time of writing)

3. Divide 20 by the current price of gold

4. That number is the amount of value still left in the dollar

At time of writing, the dollar has lost 99.2% of it’s value, in just the last ~100 years!