MATH

Google as a math calculator ...

BASIC
5+5 = 10

5-5 = 0

5*5 = 25

5/5 = 1

EXPONENTS

5^2 = 5*5 = 25

5^3 = 5x5x5 = 125

Square Root

25^.5 = 5

PERCENT

45 percent of 50 = 22.5

or

45*50% = 22.5


CONSTANTS

Speed of Sound = 340.29 m / s

Speed of Sound in miles per hour = 761.207051 mph

Pi = 3.14159265359



KITCHEN/GROCERY MATH

96 ounces in gallons = 0.75 gallons

7 quarts in gallons = 1.75 gallons

CALCULATORS

Math | Calculator | More Calculations

Use this search box to calculate tips ...

15% EXAMPLE (bill and tip) ...
TOTAL BILL =  $25 * 1.15 = $28.75
or just the tip
TIP AMOUNT = $25 * .15 =  $3.75

Here's a general guide for tipping at restaurants, fancy restaurants, cafes, buffets, and deliveries.

Waiters and waitress
15%-20% of the total bill before taxes. Some say total bill after taxes.

Bartenders
15%-20% of the total bill before taxes, or $1 for beer or wine, $2 for mixed drinks. Pay before you head for your table.

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Fine Dining at a Fancy Restaurant
15%-20% of the total bill before taxes. Some say total bill after taxes.

Wine steward
10% of wine bill.

Coatroom attendant
$1 per coat

Rest room attendant
.50-$1

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Tip jar at Cafes like Starbucks or health club cafes
Leave 5%-10% in the tip jar for good service or complicated order (optional).

Buffets
If a waiter or waitress brings your order, $1-$2 is recommended.

Hotel breakfasts are 15%-20% and are often automatically added at the cash register.

Deliveries (e.g. Pizza Deliveries)
Minimum $1 or 15% for regular service, but add more for extreme weather or for difficult access to your house, condo or apartment.