Everyday Calculators

Quick answers for daily maths: percentages, your exact age, days between dates, CGPA and trip fuel cost.

Percentage CalculatorFind a percent of a number, what percent one number is of another, or the percentage increase or decrease.Age CalculatorFind your exact age in years, months and days, and how many days are left until your next birthday.Date Difference CalculatorCount the days between two dates, with weeks, months, years and the number of weekdays.CGPA to Percentage CalculatorConvert your CGPA to a percentage using the CBSE, AICTE or simple formula.Marks Percentage CalculatorTurn your marks into a percentage, and see how many more marks you need for your target.Fuel Cost CalculatorFind how much petrol or diesel a trip will need, what it will cost, and each person's share.Mileage CalculatorFind the real mileage of your bike or car in km per litre, and what each km costs you in fuel.Electricity Bill CalculatorFind how many units your AC, fan, fridge or any appliance uses, and how much it adds to your electricity bill.

Some sums come up again and again: a percentage, someone's exact age, the number of days until an event, or what a trip will cost in petrol. These calculators give the answer instantly and show how it was worked out.

Which calculator should I use?

Percentages: the percentage calculator finds X% of a number, what percent one number is of another, and the percentage change.
Dates: the age calculator gives your exact age in years, months and days, and the date difference calculator counts the days, weeks and working days between two dates.
Students: the CGPA to percentage calculator uses the CBSE and AICTE formulas.
Travel: the fuel cost calculator works out the petrol or diesel cost of a trip and each person's share.

FAQ

How do I calculate a percentage?

Divide the part by the total and multiply by 100. For example, 45 out of 60 is 45 ÷ 60 × 100 = 75%.

How do I convert CBSE CGPA to percentage?

Multiply the CGPA by 9.5. A CGPA of 8.4 is about 79.8%.