Choose the right math tool
- Percentage Calculator: five modes covering X% of Y, “what percent”, increase, decrease and difference. Includes reverse-percentage tricks used in SSC, banking and CAT preparation.
- Fraction Calculator: add, subtract, multiply and divide fractions, with the answer simplified and shown as a mixed number, decimal and percentage.
- Average Calculator: paste a list to get the mean, median, mode, range, sum, minimum and maximum, plus guidance on which average to use.
- Random Number Generator: fair random picks for lucky draws, games, sampling and classroom activities, with or without repeats.
Learn the concept, not just the answer
Every math page on CalculatorWorld includes the formula in plain notation, at least one worked example you can follow with pen and paper, and the common mistakes examiners look for: averaging percentages with different bases, adding fractions without a common denominator, or confusing percentage points with percent. Use the calculator to check your working, not to skip it.
Handy facts to memorise
| Fact | Why it helps |
|---|---|
| X% of Y = Y% of X | 8% of 50 = 50% of 8 = 4 |
| 1/8 = 12.5%, 3/8 = 37.5%, 5/8 = 62.5% | Fast fraction–percent conversion in aptitude tests |
| A loss of L% needs a gain of L/(100−L) to recover | A 20% loss needs a 25% gain |
| Median beats mean for skewed data | Salaries, property prices, waiting times |
Looking for marks and grades? See our Education Calculators.