Science Calculators
Explore the physical world with our free online science calculators. From physics formulas and electrical circuit analysis to chemistry concentrations and molecular weights, these tools provide accurate results with step-by-step solutions for students, researchers, and professionals across scientific disciplines.
Physics
View all →Half-Life Calculator
Calculate the half-life of a substance or the remaining amount after a given number of half-lives.
Horsepower Calculator
Calculate horsepower from torque and RPM or convert between horsepower units.
Engine Horsepower Calculator
Estimate engine horsepower based on vehicle weight, quarter-mile time, or dyno data.
Ohms Law Calculator
Calculate voltage, current, resistance, and power using Ohm's law equations.
Voltage Drop Calculator
Calculate voltage drop across wires based on wire gauge, length, and current load.
Resistor Calculator
Decode resistor color bands and calculate resistance values for series and parallel circuits.
Chemistry
View all →About Science Calculators
Science calculators bridge the gap between theoretical knowledge and practical problem-solving. Our collection covers two core scientific disciplines: physics and chemistry, providing tools that handle the calculations encountered most frequently in coursework, laboratory work, and professional applications.
The Physics subcategory includes calculators for power and energy (horsepower conversions, engine performance), electrical engineering (Ohm's law, voltage drop, resistor calculations), and nuclear physics (half-life decay). These tools are invaluable for engineering students, electricians, automotive enthusiasts, and anyone working with physical systems.
The Chemistry subcategory focuses on quantitative analysis with a molarity calculator for solution preparation and dilution, and a molecular weight calculator that parses chemical formulas and computes molar masses using accurate periodic table data. Together, these tools cover the fundamental calculations needed in any chemistry laboratory.
Every calculator shows the underlying formula, walks through the solution process step by step, and provides real-world context for the results. Whether you are preparing for an exam, working through a lab assignment, or solving a professional engineering problem, these tools deliver accurate answers you can verify and understand.
Frequently Asked Questions
Can I use these science calculators for lab reports?
These calculators are excellent tools for verifying lab calculations and understanding the formulas involved. They show step-by-step solutions that can help you check your manual work. Always show your own work in lab reports and use these tools as a verification aid rather than a primary calculation source.
How accurate are the physics constants used in these calculators?
Our calculators use the latest CODATA recommended values for physical constants, which are the internationally accepted standard values. These include the speed of light, gravitational constant, Planck constant, and others defined by the International System of Units (SI). The values are accurate to the precision needed for educational and most professional applications.
Do the chemistry calculators support all chemical formulas?
The molecular weight calculator supports standard chemical formula notation including subscripts, parenthetical groups, and hydrates. It handles common compounds like H2O, NaCl, C6H12O6, Ca(OH)2, and CuSO4-5H2O. The calculator uses IUPAC standard atomic weights for all 118 elements to ensure accurate molar mass calculations.
Are these calculators suitable for university-level science courses?
Yes, these calculators are designed to handle problems at the introductory and intermediate university level. They cover fundamental concepts in physics (mechanics, electromagnetism, nuclear decay) and chemistry (stoichiometry, solution chemistry) that form the core of most science curricula. For advanced specialized calculations, consult field-specific computational tools.
How do I choose between the physics and chemistry calculators?
Physics calculators handle problems involving forces, energy, power, electrical circuits, and radioactive decay. Chemistry calculators focus on moles, concentrations, molecular weights, and solution preparation. If your problem involves physical quantities like voltage, resistance, horsepower, or decay rates, use physics tools. If it involves chemical formulas, molarity, or molar mass, use chemistry tools.
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