Calculators & Converters
Unit converters, financial calculators, BMI, age, date differences: instant and reliable results.
Units & measures
Length Converter
Convert lengths between nanometres, millimetres, metres, kilometres, inches, feet, yards, miles, nautical miles and light-years, with a table of every unit at once.
Hours to Decimal Converter
Convert hours and minutes to decimal hours and back, add up durations and fill a simple timesheet. Exact results, ready for payroll.
Math
Percentage Calculator
Work out a percentage of a number, what percentage one value is of another, a percent change, increase or decrease an amount, find the original total or compare two rates in points.
Scientific Calculator
Online scientific calculator: trigonometry in degrees, radians or gradians, logarithms, roots, powers, factorials, constants, memory and history, with keyboard or touch keypad.
Rule of Three Calculator
Solve direct or inverse proportion problems: enter three values and get the fourth, with every step explained.
Finance & business
Loan & Mortgage Calculator
Simulate the payment, total cost and amortization schedule of a loan or mortgage, with insurance, fees, any payment frequency, early repayment, a chart and CSV export.
Compound Interest Calculator
Simulate the growth of savings or an investment: starting balance, regular contributions at the start or end of each period, any compounding frequency, optional inflation, a chart and a year-by-year table.
VAT & Sales Tax Calculator
Go from price excluding tax to price including tax and back, with a free rate, several lines, different rates per line, a breakdown by rate and rounding per line or on the total.
Car Loan Calculator
Work out the monthly payment, the amount financed and the total cost of a car loan, taking the down payment, trade-in, sales tax and fees into account, with a printable amortization schedule.
Personal Loan Calculator
Simulate a personal loan: monthly payment, origination fee withheld, amount actually received, total cost of credit and effective annual rate, with an amortization schedule.
Printable Amortization Schedule
Generate a loan amortization schedule with dates, interest, principal repaid and remaining balance, by year or by payment, ready to print or export as CSV.
Hourly to Annual Salary Calculator
Convert an hourly, daily, weekly, monthly or yearly pay into every other period, based on your hours per week and your paid weeks.
Health & dates
BMI Calculator (Body Mass Index)
Calculate your body mass index in metric or imperial units, see where you sit on the WHO adult scale and find the weight range matching a BMI of 18.5 to 24.9.
Exact Age Calculator
Calculate your exact age in years, months and days from your date of birth, with days lived, the weekday you were born and your upcoming birthdays.
Date Difference Calculator
Calculate the number of days, weeks, months and years between two dates, business days with your choice of weekend, and add or subtract a duration to a date.