Everyday Calculators

For everyday money questions, the tip calculator and discount calculator handle the two most common at-the-register questions — how much to leave, and what a sale price actually costs. Planning a trip or a household budget line item? The fuel cost calculator, electricity cost calculator and shipping calculator all estimate a specific recurring or one-off cost. Sending or receiving money abroad, use the currency converter.

For dates and time, the age calculator gives an exact age in years, months and days, the date calculator finds the number of days between two dates or adds/subtracts days from one, and the time calculator does the same for durations of hours and minutes.

Students: the GPA calculator works out a cumulative GPA across courses and credits, while the grade calculator weights individual category scores (homework, exams, participation) into one final grade.

For general math, the percentage calculator covers increases, decreases and differences, the probability calculator handles single and combined event odds, and the unit conversion calculator converts length, weight and temperature. And if you just want something fun, the Big Three calculator finds your Sun, Moon and Rising astrology signs from your birth date, time and place.