Math & Science Calculators

About these calculators

The set spans four areas: everyday arithmetic like percentages and roots; geometry for area, volume, circumference and tank capacity; physics for velocity, acceleration, kinetic energy, electric charge and lens power; and chemistry for molar mass, gas volume and mass from density.

Where a calculation can be rearranged, the tool lets you solve for any variable rather than forcing one direction — enter the two values you have and it works out the third. Results keep sensible precision instead of dumping fifteen decimal places, and the significant figures calculator is there when the precision itself is the point.

Which calculator do you need?

Formulas students ask about most

• Percentage change = (new − old) ÷ old × 100
• Area of a circle = πr², and an acre is 43,560 sq ft
• Volume of a cylinder = πr²h
• Velocity = distance ÷ time, and acceleration = change in velocity ÷ time
• Kinetic energy = ½mv²
• Ideal gas law: PV = nRT, with R = 8.314 J/(mol·K)

Every calculator page shows the formula, a worked example and the common mistakes, so you can check homework answers by hand.

Maths and science guides

• Volume formulas for every shape
• Surface area and lateral area formulas
• Significant figures: rules and examples
• Percentage difference vs percentage change
• Percent yield, percent recovery and mass percent
• How to calculate pool volume
• Square feet to cubic feet and cubic yards