Quick guide
How to use this calculator
- Enter the minuend—the value being subtracted from.
- Enter the subtrahend—the value to subtract.
- Read or copy the exact difference.
Calculation method
Subtract corresponding place values
The calculator aligns the two decimal scales before subtracting the integer coefficients.
The order matters: changing the minuend and subtrahend generally changes the sign of the answer.
Worked example
Subtract 2.25 from −5.50
Starting below zero and subtracting a positive value moves farther below zero.
−5.50 − 2.25 = −7.75
Supported inputs
Precision and limits
Exact decimal input
Each value may contain up to 200 digits, including up to 100 decimal places.
No hidden rounding
Accepted values use integer-backed decimal arithmetic rather than binary floating-point math.
Clear syntax
Enter plain decimal notation without grouping separators, fractions, or scientific notation.
Private by default
Your entries are calculated in this browser and are not submitted with the calculation.