Calculators & Everyday Tools
Choose a calculator and get an answer right away. Calculations run in your browser.
Finance
Loan Repayment Calculator
Estimate the first payment, total interest, and total repayment for equal-payment, equal-principal, or balloon repayment.
Compound Interest Calculator
Estimate the balance and interest from a principal, annual rate, term, and compounding frequency.
Simple Interest Calculator
Estimate pre-tax simple interest when interest accrues only on the original principal, without compounding.
Savings Interest Calculator
Estimate total deposits, pre-tax interest, and the maturity amount for equal monthly contributions at a stated annual rate.
Deposit Interest Calculator
Estimate simple pre-tax interest and the ending balance for a single deposit using an annual rate and a term in months.
LTV Calculator
Calculate the loan-to-value ratio from a property value and loan amount. This is a basic ratio, not an approval or eligibility check.
DTI Calculator
Calculate a basic debt-to-income ratio using annual income, annual mortgage principal and interest, and annual interest on other debt.
DSR Calculator
Calculate a basic debt service ratio from annual income and total annual principal-and-interest repayments across loans.
Margin Calculator
Find gross profit and margin as a share of the selling price. The margin denominator is the sale price, not the cost.
Markup Calculator
Calculate the markup rate using cost as the base, then compare it with margin, which uses selling price as the base.
Tax
Lifestyle
Age Calculator
Calculate completed years of age from a birth date and a reference date.
Square Meter to Pyeong Converter
Convert floor area between square meters (㎡) and pyeong, a traditional Korean area unit.
BMI Calculator
Calculate body mass index from height in centimeters and weight in kilograms. The result is general information, not a diagnosis.
Running Pace Calculator
Use running distance and elapsed time to calculate minutes per kilometer and average speed in kilometers per hour.
Fuel Cost Calculator
Estimate fuel volume and cost from trip distance, vehicle fuel economy, and fuel price per liter.
Calories per Serving Calculator
Divide the total calories of a recipe or package by its total quantity, then estimate calories for the portion you eat.
Date & Time
Date Difference Calculator
Count the elapsed days between two dates and choose whether to include either endpoint in the inclusive count.
D-Day Calculator
Choose a reference date and target date to see how many calendar days remain, or how many have passed.
Workday Calculator
Count weekdays in a date range and choose whether to include the start date and end date separately.
Math & Conversion
Percentage Calculator
Find a percentage of a value, compare two values, or calculate a percentage increase or decrease.
Discount Calculator
Calculate the savings and final price from a list price and discount rate, or work out the actual discount rate from two prices.
Ratio Calculator
Reduce an A:B ratio and calculate the matching value when you know one side of the proportion.
Average Calculator
Enter a list of numbers to get their total, how many values are included, and the arithmetic mean.
Weighted Average Calculator
Pair each value with a weight to calculate an average that reflects the relative importance of each item.
CAGR Calculator
Estimate the annualized compound growth rate from an initial value, final value, and number of years.
Unit Price Calculator
Divide a total price by quantity to find the price per item, or multiply unit price by quantity to calculate a total.
Unit Converter
Convert common metric and imperial units for length, weight, and volume, or convert Celsius and Fahrenheit temperatures.
Change Rate Calculator
Compare an original value with a new one to find the absolute change and percentage change, including decreases.