Free Calculators
Check percentages, dates, weighted grades or a financial formula. These 12 calculators update answers automatically as valid values change and explain the assumptions behind each result.
Choose from all calculators
Percentage Calculator
Find percentages, proportions, and percentage changes.
Open tool →Age Calculator
Calculate calendar age between two dates.
Open tool →BMI Calculator
Calculate adult BMI using metric or imperial measurements, with a general category reference.
Open tool →GPA Calculator
Add your courses, grade points, and credits to see your weighted GPA automatically.
Open tool →CGPA Calculator
Combine semester GPAs using credit hours to find your cumulative GPA.
Open tool →Loan Calculator
Estimate monthly loan payments, total interest, and how the balance falls over time.
Open tool →Compound Interest Calculator
See how a starting balance and regular deposits grow with compound interest.
Open tool →Simple Interest Calculator
Calculate interest on a starting amount without interest-on-interest growth.
Open tool →Discount Calculator
Find the sale price and savings, including an optional second discount.
Open tool →Profit Margin Calculator
Calculate profit, margin, and markup—or find a price from your target margin.
Open tool →Date Difference Calculator
Count days between dates, with weeks and a calendar years–months–days breakdown.
Open tool →Average Calculator
Paste a list of numbers to find the average, sum, median, and smallest and largest values.
Open tool →Understand what the answer includes
GPA and CGPA weight grades by credits. Loan calculations model fixed monthly payments; simple and compound interest use different growth rules. Date Difference counts elapsed days unless you select inclusive counting.
Before you start
Use the units and period shown beside each field. Financial estimates do not include every tax, fee or lender rule. Adult BMI is a general screening calculation, not a diagnosis. These tools calculate examples rather than provide professional advice.