Math Calculators 
Prime Numbers
Determine if a number is a prime number.

Basic Math
Basic math calculations.

Percentage Calculator
Calculate a percentage.

Financial Calculators 
Loan Calculator
Calculate a monthly loan payment.

Tip Calculator
Calculate the tip on a bill.

Salary Calculator
Convert between an hourly and annual salary.

Amortization Calculator
Create an amortization schedule for a loan.

Inflation Calculator
Calculate the value of the US dollar over time.

More Calculators 
Length Calculator
Convert between centimeters and feet and inches.

BMI Calculator
Calculate a BMI based on height and weight.

Acreage Calculator
Calculate the dimensions based on acreage.
