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    Free Science Calculators 2026 – Chemistry, Physics, Energy & Environment

    Explore the science of our world with CalcPlanet's free science calculators. From chemistry and physics to environmental science and renewable energy — accurate, formula-based tools for students, researchers, and engineers.

    ✓ 4 All Online Calculators✓ No login required✓ Mobile Ready

    Most searched in this category

    pH CalculatorCarbon FootprintIdeal Gas Law

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    EV Charging Cost🔥

    Calculate EV charging cost per mile, annual fuel savings vs a gas car, and 5-year total savings.

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    Solar Savings🔥

    Calculate annual solar savings, net system cost after tax credits, payback period and 25-year ROI.

    All Science Calculators (4)

    ⚗️Density🧪Boiling Point⚡EV Charging Cost☀️Solar Savings

    Chemistry Calculators

    Calculate molarity, pH levels, ideal gas law, specific heat, molar mass, and chemical equilibrium. Our chemistry calculators support students and laboratory professionals with precise scientific formulas.

    Physics & Energy

    Compute kinetic energy, acceleration, projectile motion, thermodynamics, and nuclear energy. Our physics calculators cover classical mechanics, electromagnetism, and modern physics.

    Renewable Energy

    Calculate solar panel ROI, wind energy output, EV vs gas costs, hydropower generation, and battery storage capacity.

    Environmental Science

    Measure your carbon footprint, water consumption, and LED savings. Understand the environmental impact of your lifestyle choices with data-driven calculators.

    Science Calculators Guides

    All Guides →
    How to Calculate Density – Mass, Volume & Formula
    Learn the density formula (ρ = m/V) with step-by-step examples. Covers solids, liquids, and gases with unit conversions.
    How to Calculate Speed, Distance & Time – Formula Guide
    Learn the speed-distance-time formula (Speed = Distance ÷ Time) with worked examples for travel, running, and physics problems.
    How to Calculate Velocity, Speed & Acceleration
    Speed = d/t, velocity = displacement/t, acceleration = Δv/t. Worked physics problems with units.

    Popular Science Calculators Calculations

    Frequently searched calculations — answered instantly with formulas and step-by-step explanations.

    pH of an acid solutionCarbon footprint calculatorSolar panel ROI calculatorEV vs gas cost calculatorIdeal gas law calculatorProjectile motion calculator

    Science Calculators Formula Reference

    All Formulas →
    Molarity Formula – ChemistryIdeal Gas Law FormulaNewton's Second Law Formula – Force = Mass × AccelerationVelocity Formula – v = d/t and Acceleration EquationsDensity Formula – Mass ÷ Volume (ρ = m/V)pH Formula – pH = -log[H⁺] Explained

    Frequently Asked Questions

    How do I calculate kinetic energy?▼
    Kinetic Energy (J) = ½ × m × v², where m = mass in kg and v = velocity in m/s. For a 1,000 kg car at 20 m/s (72 km/h): KE = ½ × 1000 × 400 = 200,000 J (200 kJ).
    How do I calculate molarity?▼
    Molarity (mol/L) = Moles of Solute ÷ Volume of Solution (L). For example, dissolving 0.5 mol of NaCl in 1 litre of water gives a 0.5 M NaCl solution. Moles = Mass (g) ÷ Molar Mass (g/mol).
    How do I calculate my carbon footprint?▼
    Carbon footprint = sum of CO₂ equivalent emissions from all sources: driving (kg CO₂ = km × 0.171 for average car), flying (kg CO₂ = km × 0.255 per passenger), home energy (kg CO₂ = kWh × regional emission factor). Our calculator aggregates all major sources.
    How do I calculate solar panel ROI?▼
    Solar ROI = (Annual Energy Savings × System Lifespan − System Cost) ÷ System Cost × 100. For a $10,000 system saving $1,200/year over 25 years: (($30,000 − $10,000) ÷ $10,000) × 100 = 200% ROI over 25 years.
    What is the ideal gas law?▼
    PV = nRT, where P = pressure (Pa), V = volume (m³), n = moles of gas, R = 8.314 J/mol·K, T = temperature (Kelvin). Use K = °C + 273.15. Our ideal gas law calculator solves for any variable given the other three.
    ✓ Documented formulas — all tools use standard industry formulas✓ Updated regularly — content reviewed 2026✓ Used by thousands daily✓ Free — no sign-up required

    See also

    🔢 Mathematics⚙️ Engineering🏗️ Construction