Magical Aging

Party mage: "I cast haste!"
(Party murders all opposition. Spell ends)
DM: "Everyone make your system shock roll!"
PC's: "Yes, everyone lives!"
DM: "Ok, everyone ages a year"
Human player: "This sucks notably more for me than for the elf!"
Elf player: "Hehehe. Sucker"

Well not in my game. There are many causes of magical aging, from the attack of a ghost, to casting powerful spells. When affected by magical aging, I think it's only fair that the aging be proportionate to the actual max age of a character. To calculate the value of the final age gained, simply multiply the values below times the number of years aged. So without further ado, I present the:
"How much older am I now?" conversion chart!

For 1 year of aging:

Dwarves age 3.18 years (or 3 years and 66 days)
Elves age 5 years
Gnomes age 3.18 years (or 3 years and 66 days)
Gnomelings age 2.27 years (or 2 years and 95 days)
Half-elves age  1.40 years (or 1 year and 149 days)
Halflings age 1.36 years (or 1 year and 132 days)
Half-ogres age .95 years (or 348 days)
Half-orcs age .63 years (or 232 days)
Humans age 1 year
Pixie fairies age .07 years (or 26 days)

Or, to have it be simple enough to remember you could round.

Elves gain 5 years.
Dwarves, Gnomes and Gnomelings gain 3 years.
Half-elves, Halflings, Half-ogres and Humans gain 1 year.
Half-orcs gain six months.
Pixie faries gain a month.

This table was made taking the average value of the maximum age range of PC's in the Hackmaster Player's Handbook.