Starlight Tools directory

Science & Research Tools

89 free, browser-based tools. No account required.

Free to use
Runs in your browser
No account required

Free browser-based science tools for physics, chemistry, biology, engineering, and astronomy—everything runs locally for privacy. Try our Scientific Figure Extractor, Molecular Weight Calculator, Lab Dilution Planner, or Online Planetarium.

Scientific Figure & Page Extractor

Extract high-quality images of figures and pages from research PDFs. v1.0

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Research Abstract Formatter

Format abstracts with IMRC headings, clean whitespace, and convert to HTML, Plain Text, or LaTeX. v1.0

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BioStats Quick Calculator

Quickly calculate t-test, chi-square, or ANOVA for your biological data. v0.9 (Upgrade coming soon)

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Sequence Cleaner & Validator

Clean and validate DNA/protein sequences, remove invalid characters, and ensure proper formatting. v1.0

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Blot Image Cleaner

Upload blot/gel images for auto-inversion, contrast enhancement, and noise removal. v1.0

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Science PCR Primer Calculator screenshot with Tm, GC%, and clamp checks

PCR Primer Calculator (Tm & GC%)

Compute primer Tm (Wallace, GC% model, nearest-neighbor), GC content, 3′ GC clamp quality, and quick self-dimer/hairpin checks. v1.0.0

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Science Protein isoelectric point calculator showing pI result and charge vs pH chart

Protein Isoelectric Point (pI) Calculator

Compute isoelectric point and net charge vs pH with EMBOSS/Bjellqvist pKa sets or custom values. Private, client-side. v1.0.0

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Molecular Weight Calculator

Calculate molecular weight from chemical formulas or protein/DNA/RNA sequences. v1.0

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Chemical Equation Balancer

Balance reactants and products with whole-number coefficients, grouped formulas, and atom-count checks. Private, client-side. v1.0.0

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Empirical Formula Calculator

Find empirical and molecular formulas from element masses or percent composition with ratio steps. Private, client-side. v1.0.0

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Percent Composition Calculator

Calculate mass percent, molar mass, and element contributions from a chemical formula. Private, client-side. v1.0.0

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Science Moles, mass, and gas volume calculator screenshot converting grams, moles, and STP volume

Moles ↔ Mass ↔ Volume (Gas at STP)

Convert between moles, grams, and gas volume using STP/IUPAC STP/SATP molar volume. 100% client-side. v1.0

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Density Calculator

Calculate density, mass, or volume with metric, imperial, liquid, and cubic unit conversion. Private, client-side. v1.0.0

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Science Serial Dilution Planner screenshot with pipetting steps table and dilution ladder

Lab Dilution Planner — Serial Dilutions

Auto-plan from stock → target with pipetting limits, or build a fold-series ladder. Unit-aware, copy/share, accessible UI. v1.0.0

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Science centrifuge RPM to RCF g-force calculator for lab protocols

Centrifuge RPM ↔ RCF Calculator

Convert centrifuge RPM, rotor radius, and relative centrifugal force for lab protocols and equipment changes. v1.0.0

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Enzyme Kinetics Calculator

Michaelis–Menten plots with Lineweaver–Burk, Eadie–Hofstee, Hanes–Woolf views, plus in-browser fitting of Vmax & Km. Private, client-side. v1.0.0

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Science DNA/RNA Tm Calculator screenshot showing Wallace, GC%, and nearest-neighbor temperature results

DNA/RNA Melting Temperature (Tm) Calculator

Compute Tm via Wallace, GC% and nearest-neighbor models with salt, concentration, and solvent adjustments. Private, client-side. v1.0.0

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Protein Concentration Calculator

Estimate protein concentration via Bradford, BCA, or A280 with curve fitting, dilution, and path length support. Private, client-side. v1.0.0

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Science Beer–Lambert Law calculator screenshot solving absorbance, concentration, and molar absorptivity

Beer–Lambert Law (A = εlc)

Solve absorbance, ε, path length, or concentration; unit-aware with %T ↔ A conversion. 100% client-side. v1.0

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Henderson–Hasselbalch — Buffer pH

Compute pH from pKa and [A⁻]/[HA], or design a buffer recipe from target pH, concentration, and volume — all client-side. v1.0

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pH / pOH Calculator

Convert between pH, pOH, [H+], and [OH-] with optional pKw adjustment for acid-base problems. v1.0.0

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Titration Calculator

Calculate acid-base titration pH at any added titrant volume, plus equivalence and half-equivalence points. Private, client-side. v1.0.0

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Normality Calculator

Convert between normality and molarity, compute equivalent weight, and size solution prep from mass or target N. Private, client-side. v1.0.0

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Science ppm and ppb concentration calculator converting dilute solution units

PPM / PPB Concentration Calculator

Convert dilute concentrations across ppm, ppb, mg/L, ug/L, percent, and mass fraction. Private, client-side. v1.0.0

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Molality Calculator

Calculate molality in mol/kg, or solve for solute mass, solvent mass, and moles for solution prep. Private, client-side. v1.0.0

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Stoichiometry Calculator

Use a balanced reaction to solve mole ratios, limiting reagent, theoretical yield, and percent yield. Private, client-side. v1.0.0

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Limiting Reagent Calculator

Identify the limiting reactant, quantify excess reactant left over, and estimate theoretical yield from a balanced equation. Private, client-side. v1.0.0

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Percent Yield Calculator

Calculate percent yield, actual yield, or theoretical yield with chemistry-friendly unit conversion. Private, client-side. v1.0.0

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Equilibrium Constant Calculator

Calculate Kc or Kp from a balanced reaction, compare Q with K, and convert Kc ↔ Kp using temperature and Δn(gas). Private, client-side. v1.0.0

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Gibbs Free Energy Calculator

Calculate ΔG from ΔH, ΔS, and temperature, or connect ΔG° with equilibrium constant K. v1.0.0

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Science Nernst equation calculator screenshot for cell EMF, reaction quotient Q, and concentration cell voltage

Nernst Equation / Cell EMF Calculator

Compute electrochemical cell potential from E° and Q, solve for Q, estimate K from E°, or evaluate concentration cells. Private, client-side. v1.0.0

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Sample Size Calculator

Determine the minimum sample size for comparative studies and A/B tests. v1.0

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Beam Load Calculator

Compute support reactions, shear force diagram, and bending moment diagram for a simply supported beam with point loads and UDLs. v1.0

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Engineering Tolerances Calculator

Compute hole/shaft limits from deviations or IT grades (H/h/js), plus min/max clearance & fit type. v1.0.0

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Fluid Flow Calculator

Compute Reynolds number, velocity, or pipe diameter. Classify laminar vs turbulent flow. 100% client-side. v1.0

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Buoyancy Calculator

Compute buoyant force and floating depth (draft) from density, displaced volume, and gravity. Optional mass/weight & waterplane area for equilibrium draft. v1.0.0

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RC Time Constant Calculator

Enter R, C, and initial voltage. Get τ = R·C and a live charging/discharging plot. Optional supply voltage for charging. Private, client-side.

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Science Work, power, and efficiency calculator screenshot with force, distance, and angle inputs

Work, Power & Energy Calculator

Compute work (F·d·cosθ), average power (W/t), and efficiency from input energy or power. Private, client-side.

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Specific Heat Calculator

Solve q = mcΔT for heat energy, mass, specific heat capacity, or temperature change. v1.0.0

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Science momentum and impulse calculator screenshot with p = mv, J = FΔt, and change in momentum modes

Momentum & Impulse Calculator

Solve p = mv, J = FΔt, and Δp = m(v_f − v_i) with unit conversion, copy/download tools, and explicit sign conventions. Private, client-side. v1.0.0

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Gravity & Newton’s Second Law

Calculate surface/altitude gravity, compare Earth-g, and solve F = m·a — all client-side and private. v1.0

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Free Fall & Gravity Calculator

Time to hit ground, impact velocity, and kinetic energy from height. Presets for Earth, Moon, Mars, Jupiter; optional initial velocity & mass. v1.0

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Acceleration Unit Converter

Convert between m/s², g, ft/s², in/s², Gal/mGal/µGal, km/h/s, mph/s, and knot/s with adjustable precision, copy & share — all client-side. v1.0

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Projectile Motion Calculator

Compute range, flight time, max height, apex distance & impact speed — presets for Earth/Moon/Mars and custom g. 100% client-side. v1.0

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Centripetal Force Calculator

Compute centripetal force, radial acceleration, and g-forces from mass, speed, and radius — all private and client-side. v1.0

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Coulomb's Law Calculator

Compute electrostatic force, attraction or repulsion, electric field, and potential energy from two charges, distance, and dielectric constant. Private, client-side. v1.0.0

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Pendulum Calculator

Compute period T and frequency f from length, gravity, and amplitude. Small-angle or exact large-angle (elliptic integral, AGM). 100% client-side. v1.0

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Science Kinetic and potential energy calculator screenshot with mass, height, and velocity fields

Kinetic & Potential Energy Calculator

Calculate KE = ½mv², PE = mgh, and total energy. Solve using conservation for speed at any height or maximum height. v1.0.0

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Spring Oscillator Calculator

Compute force (F = −kx), SHM period/frequency (T, f, ω), and max spring energy (½kx²) from k, m, and x. v1.0.0

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Elastic Potential Energy Calculator

Solve U = ½kx² for spring energy, stiffness, or deformation with unit conversion, worked steps, and related force.

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Resonance & Natural Frequency Calculator

Compute ωₙ / fₙ, damping ratio ζ, Q factor, damped frequency, decay α, and bandwidth for mass–spring–damper or RLC (series/parallel). Private, client-side. v1.0.0

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Science Lens and mirror equation calculator screenshot with ray diagram and magnification results

Lens / Mirror Equation Calculator

Compute image distance, magnification, and image nature (real/virtual, upright/inverted) using the thin lens / mirror equation. Private, client-side. v1.0.0

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Science Ideal Gas Law calculator screenshot solving PV = nRT with pressure, volume, moles, and temperature inputs

Ideal Gas Law Calculator (PV = nRT)

Solve PV = nRT for any variable with unit support (atm, kPa, bar, mmHg; L, mL, m³; K/°C). Includes Boyle’s, Charles’s, and Gay-Lussac two-state solvers. v1.0.0

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Science Torque and moment of inertia calculator screenshot with shape selector, force, and lever arm inputs

Torque & Moment of Inertia Calculator

Compute τ = rF, I for common shapes (sphere, cylinder/disk, rod), angular acceleration α = τ/I, and rotational KE ½Iω². v1.0.0

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Science torque calculator screenshot with force, lever arm, angle, and unit converter controls

Torque Calculator – Force, Lever Arm & Unit Converter

Solve |τ| = rF sin(θ) for torque, force, or lever arm, then convert among N·m, lbf·ft, lbf·in, ozf·in, kgf·m, and more. v1.0.0

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Acoustic Tools

Acoustic Impedance Calculator

Compute z=ρc (Rayl), tube Zc=ρc/S, wavelength, and normal-incidence reflection & transmission. Private, client-side. v1.0.0

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Science Speed of sound vs temperature calculator screenshot with humidity and pressure options

Air — Speed of Sound vs. Temperature

Compute c from temperature (°C/°F/K). Optional humidity & pressure. Linear check + moist-air physics. v1.0.0

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Gases – Speed of Sound

Searchable table of sound speeds in common gases. Normalize to 0 °C (or any °C), switch units, and export CSV. Private, client-side. v1.0.0

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Science Fan noise power calculator screenshot estimating sound power from motor and airflow

Fans — Noise Power Generation

Estimate overall sound power level from motor power, static pressure, and flow (SI & Imperial). v1.0.0

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Science Floor vibration resonance checker screenshot comparing first-mode frequency to walking and running harmonics

Floor Vibrations — Resonance Check

Estimate first-mode floor frequency and compare against walking, running, dancing, and machinery harmonics. Private, client-side. v1.0.0

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Doppler Effect Calculator

Calculate observed sound frequency, frequency shift, and percent pitch change for moving sources and observers. v1.0.0

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Cosmology Tools

Science Star Field Planetarium screenshot rendering interactive 3D night sky

Star Field Planetarium (In development)

Explore a realistic 3D starry night sky with interactive controls. HYG 4.1 dataset, rendered 5020 stars. v0.1.1

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Science Redshift to Distance Calculator screenshot with luminosity and comoving distance outputs

Redshift Distance Calculator

Calculate Luminosity, Angular Diameter, and Comoving Distances from Redshift. v1.0

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Photon energy and wavelength calculator showing E = hf and λ = c/f results across units

Photon Energy & Wavelength Calculator

Convert between photon energy, wavelength, and frequency (E = h·f, λ = c/f) with joules, eV, nm, Hz, and a visible spectrum bar. v1.0.0

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De Broglie Wavelength Calculator

Compute matter-wave wavelengths λ = h/(m·v) with outputs in m/nm/pm, momentum, KE, and an electron vs baseball comparison. v1.0.0

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Heisenberg Uncertainty Calculator

Check position–momentum and energy–time uncertainties against ħ/2, with minimum partner values, ratios, and visual bars. v1.0.0

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Qubit vs Classical Bit Calculator

See 2^n state growth, state-vector memory needs, and the maximum qubits you can simulate from a RAM budget at chosen precision. v1.0.0

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Bloch sphere visualizer showing a qubit arrow and probabilities

Quantum Superposition State Visualizer

Plot single-qubit states on a Bloch sphere from amplitudes or θ/φ, see probabilities, share links, and export the visualization. v1.0.0

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Quantum decoherence calculator showing collision rate and decoherence time outputs

Quantum Decoherence Time Calculator

Estimate collisional decoherence from pressure, temperature, particle size, and Δx. See λ_dB, collision rate, Γ, and τ with presets for air, vacuum, water, and space. v1.0.0

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Quantum Gate Truth Table Generator

Visual mini circuit builder for Pauli, H, S/T, CNOT/CZ, and SWAP on 1–3 qubits with live truth table output. Includes Bell, GHZ, and phase-kick presets. v1.0.0

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Quantum tunneling calculator showing exp(-2κa) transmission

Quantum Tunneling Probability Calculator

Estimate barrier penetration with T ≈ exp(-2κa) from mass, barrier height, width, and energy. Includes electron and alpha-decay presets. v1.0.0

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Schrodinger particle-in-a-box calculator showing energy ladder and |psi|² plot

Schrodinger Equation Solver

1D particle-in-a-box: energies, wavefunctions, and |psi|² visualization with an energy ladder. v1.0.0

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Quantum entanglement calculator showing CHSH bar and distance inputs

Quantum Entanglement Distance Calculator

Estimate Bell-CHSH violation vs distance, loss, visibility, and detector efficiency with coincidence rates. v1.0.0

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Casimir effect calculator showing vacuum pressure vs gap

Casimir Effect Force Calculator

Compute Casimir pressure/force between parallel plates with a⁻⁴ scaling, presets for nano/micro gaps, and atmospheric comparison. v1.0.0

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Zero-Point Energy Calculator

Estimate vacuum energy from density × volume with cosmological presets, mass equivalence, battery comparisons, and toy cutoff model. v1.0.0

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Compton Scattering Calculator

Compute Δλ = λ_C(1 − cosθ), final wavelength, and photon energy change for electron scattering. Presets for X-ray backscatter and small-angle lasers. v1.0.0

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Space Unit Converter

Instantly convert between AU, Light-Years, Parsecs, and Kilometers. v1.0

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Science Cosmology Calculator screenshot showing universe age and distance results for redshift

Cosmology Calculator (Age & Distance)

Calculate the age of the universe and cosmic distances for a given redshift. v1.0

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Rocket Delta-V Calculator

Compute rocket Δv with up to 4 stages using the Tsiolkovsky equation — includes per-stage breakdown and total Δv chart. v1.0

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Satellite Orbit Period Calculator

Enter altitude to compute orbital period, velocity, and revs per day — based on Kepler’s Third Law. v1.0

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Hohmann Transfer Calculator

Δv₁, Δv₂, total Δv & time of flight between two circular orbits — optional plane change. v1.0

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Escape Velocity Calculator

Altitude → escape velocity for Earth, Moon, Mars, or a custom body. Also shows circular speed and the √2 relation. v1.0.0

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Blackbody Radiation Calculator

Peak wavelength (Wien’s law) and radiated power (Stefan–Boltzmann), with optional emissivity & area and a mini spectrum plot. v1.0.0

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COSMOTOOLS — Modern Cosmology Calculator

Compute luminosity, comoving & angular distances, lookback time, universe age, q0 & Ωk. Adjustable H0, ΩM, ΩΛ. Private, client-side. v1.0.0

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Modelling and Simulations

Conway’s Game of Life

Interactive pixel-grid simulator of Conway’s Game of Life — draw, run, pause, and explore emergent patterns. v1.0

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Ant Colony Simulator

Watch emergent trails form via pheromones. Tweak evaporation, diffusion, noise, and agent count in real time. v1.0

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Population Growth Simulator

Compare exponential and logistic growth. Adjust N₀, r, and K; play/pause, export PNG/CSV. Private, client-side. v1.0.0

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Markov Chain Random Walk

Define states and a transition matrix, then simulate random walks. View paths, visit counts, and empirical distributions. Private, client-side. v1.0.0

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$Science Fractal Generator preview with a colorful Mandelbrot-style fractal$

Fractal Generator

Explore Mandelbrot, Julia, Burning Ship, and Tricorn fractals with presets, zoom, palettes, PNG export, and shareable URLs. Private, client-side. v1.0.0

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Half-Life Calculator

Solve for remaining amount, elapsed time, half-life, and decay constant λ for exponential first-order decay. Client-side, private, and unit-aware. v1.0.0

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About These Science & Research Tools

These science tools span physics, chemistry, biology, engineering, and astronomy—running entirely in your browser so your data stays private.

Popular picks include the Scientific Figure Extractor, Molecular Weight Calculator, Lab Dilution Planner, Ideal Gas Law Calculator, and Online Planetarium. Use them free anytime.