Math & Science
Solve complex problems instantly. Percentages, geometry, and conversions.
Learn how to calculate percentages: two numbers into a percent, a percent of a number, and a percent increase or decrease.
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Percentage Calculator
Calculate percentages, percentage of a number, percentage increase/decrease, and more
Law of Cosines Calculator
Solve for a missing side or angle in any triangle using the Law of Cosines. Supports SAS and SSS cases.
Ratio Calculator
Simplify ratios, find equivalent ratios, and solve proportions.
All Math & Science Calculators
Date Difference Calculator
Calculate the number of days, weeks, months, and years between two dates
Age Calculator
Calculate your exact age in years, months, and days
Time Duration Calculator
Calculate the hours and minutes between two times
Discount Calculator
Calculate the final price after a percentage off discount and sales tax
Sales Tax Calculator
Calculate sales tax and total cost for any purchase
Tip Calculator
Quickly calculate tip amount and total bill, including splitting the check
Fuel Cost Calculator
Calculate the estimated fuel cost for a road trip
RSD Calculator (Relative Standard Deviation)
Calculate Relative Standard Deviation (RSD) and Coefficient of Variation (CV) from a data set.
Linear Interpolation Calculator
Find a value between two known points using linear interpolation formula.
Unit Rate Calculator
Calculate price per unit to find the best deal. Compare two products easily.
Factorial Calculator
Calculate the factorial of a number (n!). Supports large numbers.
Absolute Value Calculator
Find the absolute value (magnitude) of any number. |x|
Cube Root Calculator
Calculate the cube root of any number (∛x).
Null Space Calculator
Find the basis for the null space (kernel) of a matrix.
Dimensional Analysis Calculator
Perform unit conversions using the factor-label method (chain conversion).
Quadratic Formula Calculator
Solve ax² + bx + c = 0 for the discriminant, both roots, and the vertex
Pythagorean Theorem Calculator
Solve a right triangle for the hypotenuse or a missing leg
Sphere Calculator
Calculate the volume and surface area of a sphere from its radius
Mastering Math Concepts
Geometry Essentials
Understanding shapes and angles is crucial for construction, design, and physics. Our geometry tools help you solve for missing sides, angles, and areas.
Everyday Math
From shopping discounts to tip calculations, these tools handle the daily arithmetic so you don't have to.
Math Calculators FAQ
Are these calculators accurate for homework?
Yes, our calculators use standard mathematical formulas and high-precision floating-point arithmetic. However, always show your work! Use the "Step-by-Step" breakdown in our calculators to understand the process.
Do I need to convert units?
Most of our calculators are unit-agnostic (e.g., Law of Cosines works for meters, feet, or inches as long as you remain consistent). Specific converters are available if you need to switch between Metric and Imperial.
What if I get a different answer than my textbook?
Check for rounding differences. Our calculators usually default to 2-4 decimal places. Also, ensure you are using the correct mode (Degrees vs Radians) for trigonometry problems. Our tools default to Degrees for ease of use.