Science Calculators & Chemistry Tools
Use practical chemistry, physics, electronics and weather calculators in one place. Search a curated set of common compounds by name, chemical formula or CAS number, then open the calculation tool you need.
Search by name, formula or CAS number
Reference data below is a small curated set of common compounds verified against PubChem. It is not a complete chemical database.
Reference source: NIH PubChem. Always confirm identity and safety information from an authoritative source before laboratory use.
What are you trying to calculate?
Chemistry, physics, electronics and weather
Molecular Weight Calculator
Calculate molar mass from a chemical formula with an element-by-element breakdown.
Open tool →ChemistryMolarity Calculator
Calculate molarity or the mass needed to prepare a solution.
Open tool →ChemistryDensity Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →ChemistryMass Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →PhysicsWeight Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →PhysicsSpeed Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →PhysicsHalf-Life Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →ElectronicsOhm's Law Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →ElectronicsResistor Color Code Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →ElectronicsVoltage Drop Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →PhysicsHorsepower Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →PhysicsEngine Horsepower Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →WeatherWind Chill Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →WeatherHeat Index Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →WeatherDew Point Calculator
Solve a practical science calculation with clear inputs and units.
Open tool →Use science calculators as a checking tool, not a substitute for source data
Scientific calculations are reliable only when the inputs, units, constants and assumptions are correct. For laboratory work, confirm the compound identity, concentration basis and significant figures before relying on a result.
Chemical safety, handling and regulatory decisions require an authoritative source such as a safety data sheet, PubChem or your institution’s laboratory procedures. SmartCalculator is designed for calculations and cross-checking, not chemical safety approval.
Why the Science hub is organized by task
The Science hub groups tools by the problem you are solving. Chemistry tools cover molar mass, molarity, density and mass; electronics tools cover Ohm’s law, resistor codes and voltage drop; physics tools cover speed, weight, half-life and horsepower; weather tools cover wind chill, heat index and dew point.
This task-first structure helps you move from a formula or measurement to the right calculator without searching through unrelated tools.