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科學工具

化學、生物與實驗室計算機。

Free scientific calculators for students, educators, and lab work. Compute molar mass from chemical formulas, convert between grams and moles, balance chemical equations, explore the periodic table, and analyze DNA, genetics, and microscopy data — using standard atomic weights and stoichiometry. The Scientific File Converter converts CIF, PDB, XYZ, MOL, SDF, SMILES, POSCAR, XSF, JSON, STL, and OBJ structure files entirely in your browser. Every tool runs with instant results and no signup.

Popular 科學工具

科學工具
Atomic Mass Calculator
Atomic mass calculator free — IUPAC element lookup or weighted isotope average. Atomic number and u/g/mol. No signup.
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科學工具
Reaction Stoichiometry Calculator
Reaction stoichiometry calculator free — moles and grams from a balanced equation and known amount. Auto-balance, no signup.
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科學工具
Projectile Motion Calculator
Free projectile motion calculator — find range, max height, and time of flight from speed and launch angle. Instant results in your browser.
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科學工具
Blackbody Radiation Calculator
Calculate blackbody peak wavelength, Stefan–Boltzmann flux, and Planck spectral radiance from temperature. Wien's law and σT⁴. Free, browser-based physics tool.
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科學工具
Percent Yield Calculator
Percent yield calculator free — find % yield, actual yield, or theoretical yield in grams or moles. Stoichiometry lab prep, no signup.
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科學工具
Cell Division Calculator
Calculate cell count after binary fission — solve for N, N₀, divisions, generation time, or elapsed time with step-by-step growth table. Free, browser-based.
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科學工具
Lab Notebook Generator
Generate formatted lab notebook entries from your experiment details. Full entries, procedure logs, or formal experiment reports with objective, materials, procedure, observations, results, and conclusions. Copy and paste into your notebook. Free, browser-based.
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科學工具
Exoplanet Habitability Calculator
Assess exoplanet habitability with habitable zone, equilibrium temperature, and Earth Similarity Index (ESI). Presets for Earth, Proxima b, and Kepler-186f. Free, browser-based.
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科學工具
Standard Solution Calculator
Prepare analytical standard solutions from solid or stock. Calculate mass to weigh, stock aliquot for dilution (C₁V₁=C₂V₂), and verify actual molarity. Step-by-step lab procedure for volumetric flasks. Free, browser-based.
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科學工具
Ideal Gas Law Calculator
Ideal gas law calculator free — solve PV=nRT for pressure, volume, moles, or temperature. atm, kPa, L, K, °C. No signup.
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科學工具
Telescope Magnification Calculator
Calculate telescope magnification from focal lengths. Get exit pupil, true field of view, resolving power, and light grasp. Find eyepiece or scope FL for target magnification. Free, browser-based.
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科學工具
Beam Deflection Calculator
Calculate maximum beam deflection and bending moment for simply supported, cantilever, and fixed-end beams under center point loads or uniform distributed loads. Enter span, E, I, and load — results in mm or inches with L/360 and L/250 limit checks. Free, browser-based.
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