Everyday Math, Dates and School Calculators
These calculators turn everyday figures into answers you can use. Compare prices before you buy, check what a final exam score could mean, or plan around a date without doing the arithmetic by hand.
Start with the calculator that matches the decision in front of you. Enter your own figures, then use the result to plan a purchase, review your progress or check a date.
- PercentageSolve any percentage problem.
- DiscountFind the sale price and how much you save.
- TipCalculate the tip and split the bill.
- Unit priceCompare two products by price per unit.
- AgeFind exact age from a date of birth.
- Days between datesCount the days between two dates.
- Add days to a dateFind the date a number of days from another date.
- GPACalculate your GPA for a term and overall.
- Final gradeFind the score you need on the final.
- GradeTurn points earned into a percentage and letter grade.
- Margin of errorFind a survey's margin of error.
- Trip fuel costEstimate the fuel cost of a trip.
- MPGCalculate your car's fuel economy.
Which calculator should you use for a purchase?
Use Percentage to work through a percentage problem, or Discount to see the sale price and the amount saved. If you are comparing package sizes or quantities, Unit price shows the price per unit so you can judge which offer costs less for what you get. Use Tip to calculate the tip and split a bill.
These results can help you decide whether a sale fits your budget, compare products on equal terms, or settle a shared bill. Check that you are comparing the same unit and using the price you would actually pay.
How can date and age calculators help with planning?
Age finds your exact age from a date of birth. Days between dates counts the time between two dates, while Add days to a date gives you the date after adding a chosen number of days.
Use these tools to check an age for a form, count time between travel or school dates, or plan a due date. For an important deadline, confirm the date and any rules with the organization that set it.
Which school calculator helps with grades?
Grade converts points earned into a percentage and letter grade. GPA calculates your GPA for a term and overall. Final grade estimates the score you need on the final based on your current standing and target.
Use the result to see whether to focus on upcoming work, ask your instructor about grading, or reconsider a course goal. The calculation is only as useful as the scores and grading details you enter, so check them against your course syllabus.
Questions
How should I use a calculator result?
Treat it as a calculation based on the information you entered. Check the inputs, then compare the answer with the price, date, grade policy or other details that apply to your situation.
What does a margin of error tell me?
Margin of error estimates how much a survey result may differ from the value for the full group being studied. It does not, by itself, tell you whether the survey was well designed or representative.
How can I estimate the fuel cost of a trip?
Use Trip fuel cost to estimate what you may spend on fuel. MPG helps you calculate your car's fuel economy. Use figures that reflect your vehicle and route, and remember that actual fuel use can vary.
Before you act. These calculators and guides are educational estimates, not professional advice. Review any decision with a qualified professional who can look at your full situation.