Everyday Calculators
The short calculations that come up in ordinary life, done properly. Discounts stack the way shops actually apply them, date differences count real calendar months rather than dividing by thirty, and the loan calculator uses the standard amortisation formula rather than simple interest.
- Percentage Calculator
Find a percentage of a number, work out what percentage one number is of another, or calculate percentage change.
- Tip Calculator
Work out the tip, the total and the amount per person, with an option to round the total up.
- Discount Calculator
Work out a sale price, the amount saved, and what stacked discounts really come to.
- BMI Calculator
Calculate body mass index from height and weight in either metric or imperial units.
- Age Calculator
Work out an exact age in years, months and days from a birthdate, plus days until the next birthday.
- Date Difference Calculator
Count the days, weeks, months and business days between any two dates.
- GPA Calculator
Calculate a term GPA on the 4.0 scale, weighted by the credit hours of each course.
- Loan Payment Calculator
Estimate a monthly loan payment, total interest and total repaid from the amount, rate and term.
- Sales Tax Calculator
Add sales tax to a price, or work backwards from a tax-inclusive total to the pre-tax amount.
- Time Zone Converter
Convert a date and time between any two time zones, with daylight saving handled automatically.