Decimal Calculator
Perform decimal calculations and quickly convert decimal numbers into fractions and percentages.
Use this calculator for addition, subtraction, multiplication, division, decimal-to-fraction conversion, and decimal-to-percentage conversion.
Decimal Calculator
Enter two decimal numbers and select an operation.
Decimal Calculation Result
Decimal Place Values
What Is a Decimal?
A decimal is a way of representing numbers using a decimal point to separate whole-number values from fractional values. For example, 12.75 represents twelve whole units and seventy-five hundredths.
Digits to the right of the decimal point represent tenths, hundredths, thousandths, and smaller place values.
How to Calculate Decimals
Adding Decimals
When adding decimal numbers, align their decimal points and add the corresponding place values. For example, 2.5 + 1.25 equals 3.75.
Subtracting Decimals
Decimal subtraction also requires the decimal points to be aligned. Zeros can be added to the right of a decimal when necessary to make the place values easier to compare.
Multiplying Decimals
Multiply decimal numbers as whole numbers first, then place the decimal point according to the total number of decimal places in the original numbers.
Dividing Decimals
Decimal division can be performed by moving the decimal point in the divisor and dividend by the same number of places when necessary.
Decimal to Fraction and Percentage
A terminating decimal can be converted to a fraction by writing it over a power of ten and then simplifying the fraction.
For example, 0.75 can be written as 75/100 and simplified to 3/4.
To convert a decimal to a percentage, multiply the decimal by 100 and add the percent sign. For example, 0.75 is equal to 75%.
Decimal Calculator Examples
| Calculation | Result |
|---|---|
| 2.5 + 1.25 | 3.75 |
| 10.5 − 2.25 | 8.25 |
| 2.5 × 4 | 10 |
| 10 ÷ 4 | 2.5 |
| 0.75 as a fraction | 3/4 |
| 0.75 as a percentage | 75% |
Frequently Asked Questions
What can this decimal calculator do?
It can perform decimal addition, subtraction, multiplication, and division. It can also convert a decimal value into a fraction and percentage.
How do I convert a decimal to a fraction?
Enter the decimal number and choose the Convert Decimal option. The calculator converts terminating decimal values into an equivalent simplified fraction.
How do I convert a decimal to a percentage?
Multiply the decimal by 100. For example, 0.25 becomes 25%. The calculator performs this conversion automatically.
What are decimal place values?
The first digit after the decimal point is the tenths place, the second is the hundredths place, and the third is the thousandths place.
Is this decimal calculator free?
Yes. CalclyWorld's decimal calculator is free to use online.