The Hby category of vCalc's most commonly used HOBBY calculators.  These include single purpose calculators (aka equations). The comprehensive list is comprised of the items in the section below. However, here are a few examples:

• Calories Burned Exercising Calculator: 13 functions that estimate the calories burned doing various types of exercising from skiing to golf base on the duration and intensity of activity.
• Firearms Calculator:9 functions on building and using firearms and ammunition. 
• Drinks for a Party Calculator: 7 functions to estimate amount and cost of champagne, wine, beer, coffee or lemonade needed for a party. 
• Taco Bar Calculator: Amount of ingredients (meat etc.) needed to make tacos for a group of people.
• Grilling Calculator: 7 functions to compute the amount of pulled-pork, pork ribs, hot dogs and sausages, hamburgers and baked beans needed for a group of people.
• How many Candies in a Container: 8 functions to estimate the number of Jelly Beans (mini, regular, jumbo), M&M's (plain and peanut), and Gum Balls in a different shaped containers.
• Dungeon and Dragons Dice: 7 functions that simulate having dice with 4, 6, 8, 10, 12, 20 and 100 sides.