## Hobby Calculators

**Boating**

High Performance Bass Boat Speed Calculator
Enter your engine RPM, Prop Pitch in inches, and Gear Ratio and find out how fast your bass boat really goes!

**Aquarium**

You can use these calculators to calculate volume, water chemistry, glass, design, electrics, and more..

**Chess - Darts - Karts - Boats**

You can use these calculators to calculate chess rating, darts score, kart ratio, and bass boat speed.

**Horses**

You can use these calculators to calculate feeding, foaling, weight, cost, and more..

**Music**

You can use these calculators to calculate strings, chords, fretboard, neck angle, and more..

**Rock climbing - Skydiving**

You can use these calculators to calculate canopy size, wing load, shock force, and free fall simulation.

**Scuba Diving**

You can use these calculators to calculate weight-belt, gas consumption, MOD, SAC, and more..

**Shooting**

You can use these calculators to calculate paintball trajectory, ballistic coefficient, distance, power, stability, and more..

**Soap making**

You can use these calculators to calculate water, Sodium Hydroxide, fragrance, lye, cost, recipe, and more..

**iPhone and iPod calculators**
**Aquarium**

Calculate fish tank volume, heating, and lighting requirements.

**Darts**

Do you struggle to add up the darts to know what has just been scored? How many times have you stood there unable to do simple maths under pressure? If the answers to these questions are Yes and Lots then this App is for you. Just input what scores have been made and this App will tell you how much was scored.

**Soap making**

Choose from the list of oils then enter the weight ( oz / g ), you can calculate the amount of sodium hydroxide and water.

**iPad calculators**
**Soap making**

Choose from the list of oils then enter the weight ( oz / g ), you can calculate the amount of sodium hydroxide and water.