Finance & Business Calculators
Free business calculations to project investment compounding growth, calculate loan interest payments, calculate sales tax rates, and estimate your hourly wage equivalents.
Simple Interest Calculator
Calculate simple interest values, principal, rate, or time parameters using the standard formula.
Compound Interest Calculator
Calculate compound interest rates over time, compounded monthly, quarterly, or annually.
Sales Tax Calculator
Quickly determine sales tax additions or work backwards to find pre-tax values.
Discount Calculator
Calculate final purchase price, savings amounts, and sales tax percentages on discounted items.
Salary to Hourly Converter
Convert your annual, monthly, or weekly salary into an equivalent hourly wage rate.
Finance & Business FAQs
What is the difference between simple interest and compound interest?
Simple interest is calculated only on the principal amount of a loan or investment. Compound interest is calculated on the principal plus any accumulated interest from previous periods, leading to exponential growth over time.
How is sales tax calculated?
Sales tax is calculated by multiplying the purchase price of an item by the tax rate (in decimal form). For example, a $100 item with a 7% sales tax will have $7 in tax, making the total cost $107.
How do you calculate salary to hourly rates?
To convert an annual salary to an hourly wage rate, divide the salary by the number of work hours in a year. For a standard 40-hour work week over 52 weeks, divide the annual salary by 2,080 hours.