Math Calculators
Math calculators for percentages, fractions, scientific functions, expressions, ratios, and everyday number checks.
Guide
Math calculator basics
Math calculators are best for quick checks when the question is clear. Pick the tool that matches the problem, enter the known values, and check the result against the formula or steps shown on the page. For longer expressions, parentheses and angle mode matter.
Tools
Which math calculator to use
Percentage Calculator
Use it for percent of a value, percent ratios, original value questions, and percent change.
Fraction Calculator
Use it to add, subtract, multiply, divide, and simplify fractions.
Scientific Calculator
Use it for expressions, parentheses, powers, roots, logarithms, constants, and trigonometry.
Expressions
Use parentheses and angle mode carefully
Parentheses change the order of a calculation. They are useful when an expression has several operations or when a fraction-style calculation is entered on one line. For sin, cos, and tan, choose Deg or Rad before calculating. A wrong angle mode can produce a correct-looking number that answers the wrong question.
Checking
Read rounded answers with care
A calculator result can be rounded for display. That is usually fine for everyday use, but schoolwork, formulas, and technical checks may need more digits. If a result looks unexpected, clear the input, re-enter the expression, and check the operation order.
FAQ
Math calculators FAQ
Which math calculator should I use first?
Use Percentage Calculator for percent questions, Fraction Calculator for fraction arithmetic, and Scientific Calculator for expressions, powers, roots, logarithms, and trigonometry.
Can the scientific calculator handle parentheses?
Yes. Use parentheses when you need to control the order of operations, especially in longer expressions.
Should I use degrees or radians?
Use degrees for everyday angle measurements. Use radians when the problem or formula is written in radians.
Why do decimal results sometimes look slightly rounded?
Some calculations use decimal approximations. The page rounds results for readability, but you should keep more precision for schoolwork or engineering checks when needed.