Math & Science Calculators
Free scientific, statistical, and everyday math tools with clear steps
From percentages and fractions to standard deviation and molecular weight, our math calculators use high-precision arithmetic and explain the formula behind every result.
Scientific Calculator
Trigonometric, logarithmic, exponential functions
Percentage Calculator
Percent, discount, tip, percentage change
Fraction Calculator
Add, subtract, multiply, divide, simplify
Triangle Calculator
Sides, angles, area, perimeter
Random Number Generator
Generate numbers in a range
Parlay Calculator
Combine legs, odds and parlay payout
Percentage Change Calculator
Increase or decrease between two values
Decimal to Fraction Calculator
Convert decimals to fractions and vice versa
Standard Deviation Calculator
Mean, variance, sample & population std dev
Exponent Calculator
Calculate powers, roots, and scientific notation
Percent Off Calculator
Sale price after discount with sales tax
Proportion Calculator
Solve a/b = c/d for the missing value
Square Footage Calculator
Area in sq ft and sq m for any shape
Concrete Calculator
Volume, cubic yards, and bag count
Molecular Weight Calculator
Molar mass from any chemical formula
What makes our math & science calculators different
High-Precision Arithmetic
Internal math uses extended precision - rounding only happens for display, so the answers stay exact.
Formulas & Steps
Each calculator shows the formula and the working - useful for homework and self-checking.
Wide Topic Coverage
Arithmetic, percentages, fractions, geometry, statistics, unit conversion, and chemistry basics.
100% Free, No Signup
Every math tool is free to use - desktop, tablet, and mobile browsers supported.
Frequently asked questions about our math calculators
What math topics are covered?
Basic arithmetic, percentages, fractions, geometry (triangles, area, square footage), statistics (mean, standard deviation), chemistry (molecular weight), and more.
Are the results accurate?
Yes. We use high-precision internal math and only round for display. For pure-arithmetic calculators the result is exact up to the displayed precision.
Can I use these calculators for school?
Yes. Many students use our fraction, percentage, and percentage-change calculators to check homework. For learning, pair the answer with the formula shown on the page.
What is the standard deviation calculator for?
It measures the spread of a data set - used in statistics classes, research, quality control, and finance for risk/volatility.
Do I need to install anything?
No. All math calculators run in your browser - desktop, tablet, and phone.