Compound interest means you earn interest on your original money and on the interest already earned. Over long periods, this can make a large difference. Use the Compound Interest Calculator to test your own starting amount, contribution, rate of return,…
Counting days between dates is useful for deadlines, billing cycles, travel plans, school assignments, work schedules, legal timelines, and project planning. Use the Date Calculator to find the number of days between two dates or to add and subtract days…
GPA, or grade point average, converts course grades into a single number. Many schools in the United States and Canada use a 4.0 scale, although grading rules can vary. Use the GPA Calculator to enter courses, grades, and credit hours.…
BMI and body fat percentage both estimate body size, but they answer different questions. BMI compares weight with height. Body fat percentage estimates how much of your weight is fat mass. Start with the BMI Calculator for a quick screening…
Sales tax changes the final price you pay at checkout. A product may cost $100 before tax, but the final total depends on the state, province, city, or product category. Use the Sales Tax Calculator to estimate tax and total…
Monthly loan payments are based on the loan amount, interest rate, repayment term, and payment schedule. The higher the rate or shorter the term, the higher the monthly payment. Use the Loan Calculator to estimate payments for personal loans, business…