Rounding Calculator
Round a number to any number of decimal places (or tens, hundreds) using the rounding rule you need.
Rounded
2.68
Show the work
Move the decimal point: times 10 to the power of places
s = x × 10 to the power of places
2.675 × 10 to the power of 2 = 267.5
Round half away from zero
round(s)
round(267.5) = 268
Move the decimal point back
result = rounded ÷ 10 to the power of places
268 ÷ 10 to the power of 2 = 2.68
How it works
Scale by 10^places, apply the rule, scale back
Questions
- How does the rounding calculator work?
- Scale by 10^places, apply the rule, scale back.
- What do I need to enter?
- Number, Decimal places, Rule. Optional fields can be left blank.
Related tools
- Significant Figures CalculatorCount the significant figures in a number and round it to a chosen number of significant figures.
- GPA CalculatorCalculate a grade point average on the 4.0 scale from letter grades and credit hours.
- Weighted Grade CalculatorCombine assignment and exam scores by their weights into one course grade.
- Random Number GeneratorGenerate random whole or decimal numbers in a range, with or without repeats.
- Pythagorean Theorem CalculatorFind the missing side of a right triangle from the other two, plus its area, perimeter and angles.
- Exponent CalculatorRaise a number to any power — whole, negative or fractional — with exact results for whole-number powers.
Want this on your site? Embed the rounding calculator.