Everyday Math Tools
5 tools
Quick calculations you would rather not do on paper: Celsius to Fahrenheit and Kelvin, whether a year is a leap year, how much simple interest a sum earns, what a commercial (bank) discount takes off a note paid early, and your weighted grade average with the score you need on the final exam. Each result comes with the formula behind it, so you can check the working or learn it as you go.
Tools in this category
Bank Discount Calculator
Commercial discount on a note or invoice: discount, net value received and the real yearly cost, compared with the rational discountFinal Grade Calculator
Weighted average of your grades with free weights, plus the score you need on the final exam to reach your target. Any scale.Leap Year Calculator: Check Any Year
Check whether a year from 1583 to 9999 is a leap year, with the three tests, the next leap year and a list for any rangeSimple Interest Calculator
Find interest and final amount, or solve for principal, rate or time, in years, months or days, with the steps shownTemperature Converter: Celsius, Fahrenheit, Kelvin & Rankine
Convert °C, °F, K and °R in any direction as you type, with step-by-step formulas and a reference table from absolute zero to the Sun