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Science Calculators

Free calculators for physics, chemistry, and engineering problems.

Ohm's Law Calculator Calculate voltage, current, or resistance using Ohm's Law. Enter any two values

Voltage Calculator Calculate electrical voltage from current and resistance, or from power and curr

Resistor Color Code Calculator Decode resistor color bands to find resistance value and tolerance. Supports 4-b

Speed Calculator Calculate speed from distance and time, distance from speed and time, or time fr

Density Calculator Calculate density from mass and volume, mass from density and volume, or volume

Force Calculator Calculate force, mass, or acceleration using Newton's Second Law F = ma. Support

Molar Mass Calculator Find the molar mass of common elements and chemical compounds in g/mol. Instantl

pH Calculator Calculate pH from hydrogen ion concentration [H⁺], or find [H⁺] and [OH⁻] from a

Half-Life Calculator Calculate the remaining amount of a radioactive substance after a given time usi