Scientific Calculators
A full scientific calculator plus physics, chemistry, mathematics and statistics tools with formulas, units and worked steps for students and researchers.
Flagship instrument
The OneCalcApp Scientific Calculator
Trigonometry, logarithms, powers, roots, memory, fractions, matrices, vectors and complex numbers — with calculation history, keyboard control and instant results.
Open the calculatorPhysics
Motion, energy and waves with SI units and full working.
Kinetic Energy Calculator
Energy of a moving body from its mass and speed.
Projectile Motion Calculator
Range, maximum height and flight time from launch speed and angle.
Wavelength & Frequency Calculator
Convert between wavelength, frequency and photon energy.
Density Calculator
Density, mass or volume of any material in SI units.
Chemistry
Concentration, dilution, acidity and gas behaviour.
Molarity Calculator
Solution concentration from solute mass, molar mass and volume.
Dilution Ratio Calculator
Mix any dilution ratio from 1:10 to 1:1000 — get concentrate and water amounts in oz per gallon, ml per litre, plus a printable ratio chart.
pH Calculator
Convert between hydrogen ion concentration, pH and pOH.
Ideal Gas Law Calculator
Solve PV = nRT for pressure with known moles, volume and temperature.
Mathematics & Statistics
Algebra and data analysis with step-by-step substitution.
Electricity
Everyday circuit maths for students and technicians.
About the science suite
From a trigonometric expression to a molarity or a standard deviation, the OneCalcApp science suite shows the equation, the substitution and the result with correct significant figures and SI units.
Each tool is designed for classroom and lab use: fast on mobile, readable in dark mode and printable when you need the working on paper.