Science Calculators
Calculators for the formulas students and scientists use every day. Each one names the equation, its units and its assumptions.
All 45 science tools
Grouped by what they do.
Motion & forces
6 toolsHow things move and the forces involved.
- Speed, Distance & Time Calculator Speed, distance or time from the other two — in any units, with the working shown.
- Acceleration Calculator Acceleration three ways — or any other variable — with g-force and 0–100 km/h times.
- SUVAT Calculator (Kinematic Equations) Any three of s, u, v, a, t in — the other two out, with both roots and every substitution.
- Force Calculator (Newton’s Second Law) F = ma for any variable, weight on any planet, and the resultant of several forces.
- Projectile Motion Calculator Range, height and flight time from any launch — with air drag and a target solver.
- Free Fall Calculator (with Air Resistance) How long a fall takes and how fast it ends — with or without air resistance.
Energy, heat & fluids
3 toolsEnergy, heat, pressure and matter.
- Kinetic Energy Calculator KE = ½mv² for any variable, spinning and rolling objects, and a relativity check.
- Density Calculator ρ = m/V for any variable, shape volumes, specific gravity and a float-or-sink check.
- Specific Heat & Heat Energy Calculator q = mcΔT for any variable, phase changes with latent heat, and calorimetry.
Waves, light & sound
1 toolWaves, light and sound.
Electricity & magnetism
7 toolsCircuits, charge and magnetic fields.
- Capacitor Code Calculator Read any capacitor marking, or find the codes for a value — in pF, nF and µF at once.
- Ohm's Law Calculator Any two of V, I, R and P give the other two — with the working shown.
- Series & Parallel Resistor Calculator Combine parts, solve whole networks and make odd values from two standard parts.
- Voltage Divider Calculator Divider output, the resistors for a target voltage, and bridges — with the load included.
- LED Resistor Calculator The right resistor for your LEDs, its wattage, the real current and the power wasted.
- Resistor Color Code Calculator Colours to ohms and ohms to colours — IEC 60062:2016, with the E-series check.
- SMD Resistor Code Calculator Read chip-resistor markings or find the code for a value — every scheme, both ways.
Nuclear & modern physics
1 toolRadioactivity and relativity.
Chemistry
13 toolsAmounts, reactions and solutions.
- Dilution Calculator (C1V1 = C2V2) & Serial Dilutions C₁V₁ = C₂V₂, mixing, serial dilutions and dilution ratios — with the volumes to pipette.
- Molar Mass Calculator Molar mass, % composition and more from any formula, with IUPAC 2024 atomic weights.
- Grams to Moles Calculator Mass, moles, particles and gas volume of any substance, with every step shown.
- pH Calculator Exact pH of acids, bases, salts and mixtures — or convert pH, pOH, [H⁺] and [OH⁻].
- Chemical Equation Balancer Smallest whole-number coefficients for any reaction, checked atom by atom.
- Ideal Gas Law Calculator (PV = nRT) PV = nRT in any units, plus gas density, molar mass, STP volumes and real gases.
Show all 13 Show fewer Chemistry tools
- Gas Laws Calculator (Boyle, Charles, Combined) Two-state gas laws, partial pressures, gas over water and effusion — in any units.
- Stoichiometry & Limiting Reactant Calculator Limiting reactant, excess, theoretical and percent yield — step by step.
- Electron Configuration Calculator Any element or ion: configuration, orbital diagram, exceptions and quantum numbers.
- Empirical & Molecular Formula Calculator From percentages, masses or combustion data to a formula, with every rounding shown.
- Interactive Periodic Table Every element’s data, trend heat maps, search, filters and side-by-side comparison.
- Lewis Structure Generator (with VSEPR Shape) Lewis structures with formal charges and resonance, plus VSEPR shape and polarity.
- Molarity Calculator Mass to weigh, molarity or volume — with a ready-to-follow preparation recipe.
Biology & genetics
3 toolsGenetics, molecules and lab calculations.
- Punnett Square Calculator Any cross from Aa × Aa to a 256-square tetrahybrid, with ratios and a χ² test.
- DNA to Protein Translator (Transcription & Translation) DNA → mRNA → protein in any frame and any NCBI genetic code, with an ORF finder.
- Reverse Complement Generator (DNA/RNA) Reverse-complement any DNA or RNA — FASTA, GenBank or plain — with IUPAC codes.
Weather & environment
4 toolsWeather, air and the environment.
- AQI Calculator (US EPA & India NAQI) Pollutant readings to AQI, category and health advice — US EPA or India CPCB.
- Dew Point, Humidity & Wet-Bulb Calculator Dew point, humidity and wet bulb from any one humidity reading, in °C or °F.
- Heat Index Calculator (Feels-Like Temperature) How hot it feels: the NWS heat index, its risk category, humidex and apparent temperature.
- Wind Chill Calculator & Frostbite Time How cold the wind makes it feel, and how fast exposed skin can freeze.
Astronomy & sky
3 toolsThe sky, the Sun, the Moon and the planets.
- Moon Phase Calculator & Moonrise Times Today’s Moon or any date’s — phase, moonrise, supermoons and eclipses.
- Sunrise, Sunset & Golden Hour Calculator Sun times for any place and date — twilight, golden hour and day length included.
- Weight & Age on Other Planets How much you’d weigh — and how old you’d be — on other worlds, from NASA data.
Calculators & measurement
4 toolsCalculation and measurement for any science.
- Scientific Calculator Type or tap: trig, logs, roots and constants, with exact answers when they exist.
- Significant Figures Calculator Counts sig figs digit by digit, rounds correctly and applies the rules to + − × ÷.
- Scientific Notation Calculator Standard form ⇄ a × 10ⁿ, E notation and SI prefixes — plus + − × ÷ with the steps.
- Logarithm & Antilog Calculator log, ln and log_b to high precision — with change of base, log laws and log tables.
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Science tools A–Z
D
H
L
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- Scientific Calculator
- Scientific Notation Calculator
- Series & Parallel Resistor Calculator
- Significant Figures Calculator
- SMD Resistor Code Calculator
- Specific Heat & Heat Energy Calculator
- Speed, Distance & Time Calculator
- Stoichiometry & Limiting Reactant Calculator
- Sunrise, Sunset & Golden Hour Calculator
- SUVAT Calculator (Kinematic Equations)
Collections with science tools
All collections →Good to know
- All 45 tools run in your browser: what you open or paste is not uploaded.
- All of them keep working without a connection once loaded.
- Results are estimates for planning and learning, not medical or engineering advice. Check the method and assumptions on each tool’s page.
Other categories
All tools →- 132 tools Developer Format, validate, encode, decode.
- 40 tools Data CSV, Excel, tables, charts.
- 95 tools Text Count, clean, sort, compare.
- 92 tools Image Compress, resize, convert, crop.
- 55 tools PDF Merge, split, extract, convert.
- 35 tools Audio & Video Convert, trim, compress media.
- 56 tools Design Colours, gradients, CSS.
- 36 tools SEO Meta tags, sitemaps, schema.
- 27 tools Social Media Captions, previews, limits.
- 94 tools Finance Loans, savings, interest, tax.
- 78 tools Business Invoices, quotes, margins.
- 39 tools Legal Templates and legal maths.
- 48 tools Health BMI, calories, pregnancy.
- 51 tools Math Calculators and solvers.
- 31 tools Engineering Electronics, electrical, mechanical.
- 29 tools Construction Materials, area, home costs.
- 80 tools Education Grades, citations, study.
- 36 tools Network DNS, headers, IPs, subnets.
- 35 tools Security Passwords, encryption, keys.
- 33 tools Converters Every unit, exact factors.
- 75 tools Utility Convert, count down, randomise.