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1822 apps · Showing 865–960

Data & Calculators: View & Inspect

CSV · ViewCSV ViewerOpen a CSV or TSV file as a clear table, search the rows, and check basic file details without uploading it.

Data & Calculators: Clean & Organize

CSV · OptimizeCSV CleanerTrim extra spaces, remove empty rows and columns, and repair uneven CSV data in one private pass.CSV · OrganizeCSV Column PickerChoose, reorder, and export only the CSV columns you want while leaving the original file untouched.CSV · OrganizeCSV SorterSort a CSV by any column from A to Z, Z to A, smallest to largest, or largest to smallest.CSV · OptimizeRemove Duplicate CSV RowsFind repeated CSV rows by every column or the columns you choose, then keep one clear copy of each row.

Data & Calculators: Convert

CSV · ConvertCSV Delimiter ConverterChange commas, tabs, semicolons, or pipes without breaking quoted text, commas inside cells, or line breaks.CSV · ConvertCSV to JSON ConverterConvert CSV or TSV rows into clean JSON objects, with each heading used as a clear field name.JSON · ConvertJSON to CSV ConverterConvert a JSON object or list of objects into a spreadsheet-ready CSV with one column for every field.

Data & Calculators: Combine & Split

CSV · OrganizeMerge CSV FilesCombine CSV files into one table, match columns by heading, and leave a blank when a file is missing a value.CSV · OrganizeSplit CSVBreak one large CSV into smaller files with the same headings and the exact number of rows you choose.

Data & Calculators: Date Calculators

Calculator · CalculateAge CalculatorFind an exact age in years, months, and days, plus the next birthday and useful age milestones.Calculator · CalculateBusiness-Day CalculatorCount workdays or add business days using your workweek and a custom holiday list.Calculator · CalculateDate Difference CalculatorMeasure the exact time between two moments in calendar units, hours, minutes, and seconds.Calculator · CalculateDays Between Dates CalculatorCount calendar days between two dates with clear start-day and end-day inclusion choices.

Data & Calculators: Everyday Math

Calculator · CalculatePercentage CalculatorSolve percentage questions, changes, increases, and decreases with the formula shown in plain language.Converter · ConvertUnit ConverterConvert length, weight, temperature, area, volume, speed, time, data, energy, and pressure units.

Data & Calculators: Clocks & Timers

Timer · CountCountdown TimerCount down a duration or a future date with quick presets, pause controls, and an optional finish sound.Timer · CountStopwatchTime anything with a precise stopwatch, lap splits, best and slowest laps, and keyboard controls.Clock · ViewWorld Clock & Meeting PlannerCompare live local times around the world and find a meeting time that lands on the right day.

Data & Calculators: Business Pricing

Calculator · CalculateMobile Massage Travel Fee CalculatorPrice mobile visits from true trip costs, an included radius, minimum fees, income goals, and groups, then copy a three-zone policy.

Data & Calculators: Business Calculators

Calculator · CalculateCamp Pricing & Break-Even CalculatorTry different prices and group sizes. See how many bookings could cover your costs.Calculator · CalculateMassage Room Rent vs Commission CalculatorCompare room rent and commission across working weeks, recovered no-show fees, full costs, hourly earnings, and client break-even.Calculator · CalculateNo-Show Cost, Deposit & Cancellation Window CalculatorCalculate revenue and time lost to no-shows, then optimize a practical deposit, cancellation window, and the net ROI of reminders or a waitlist.

Data & Calculators: Averages & Centers

Numbers · CalculateArithmetic Mean FinderAdd a list of numbers and divide by how many values it has.Numbers · CalculateGeometric Mean FinderFind the geometric mean of positive numbers such as growth factors.Numbers · CalculateHarmonic Mean FinderFind the harmonic mean of positive rates or ratios.Numbers · CalculateLog Average FinderFind an average in log space for positive values that span a wide range.Numbers · CalculateMost Common Number FinderFind the number that appears most often in a list.Numbers · CalculateNumber List Extent FinderFind both ends of a number list and the distance between them.Numbers · CalculateNumber List Median FinderSort a number list and find the value in its middle.Numbers · CalculateNumber List Product FinderMultiply all numbers in a list and show the final product.Numbers · CalculatePrecise Number List SumAdd many values with a method that reduces floating-point rounding loss.Numbers · CalculateRoot Mean Square FinderSquare, average, and take the root to measure the size of changing values.

Data & Calculators: Biology Calculators

Calculator · CalculateCell Population Doubling Time & Continuous Growth RateCalculate exponential doubling time and continuous growth rate from a rising cell count or concentration measured over a positive time interval.Calculator · CalculateCell Suspension Dilution: Concentration & VolumeBalance cell concentration and volume before and after dilution using conservation of cell count and compatible volume units.Calculator · CalculateDaily Plant Light Budget from PPFD & DurationCalculate a daily light integral from measured photon flux and daily exposure, or find the light duration or PPFD needed for a specified photon budget.Calculator · CalculateDNA Insert Mass from Vector Mass & Molar RatioCalculate insert DNA mass from vector mass, fragment lengths and a chosen insert-to-vector molar ratio, with bp/kb and mass unit choices.Calculator · CalculateExponential Bacterial Growth & Doubling TimeRelate initial and final populations, elapsed time, hourly fractional growth and doubling time during ideal exponential growth.Calculator · CalculateField Coverage from Width, Speed & OverlapEstimate area covered per hour and moving time from implement width, travel speed and overlap, with acre and hectare conversion.Calculator · CalculateLog Reduction, Surviving Count & Percent ReductionConvert positive before-and-after counts into decimal-log and percentage reductions, including inverse count calculations.Calculator · CalculateObserved Mutant Fraction of a PopulationCalculate observed mutant frequency from mutant and total counts, or recover a count from the fraction.Calculator · CalculateqPCR Standard-Curve Efficiency & Amplification FactorConvert a negative standard-curve slope to amplification factor and apparent qPCR efficiency, or recover slope from the factor.

Data & Calculators: Camp Operations

XLSX · CalculateCamp Staffing PlannerPlan your team, shifts and breaks. Spot times when you need more help.

Data & Calculators: Charts & Data

Vega-Lite / SVG / JSON · ConvertChart Specification PlaygroundEdit a Vega-Lite chart in JSON. Preview changes, check errors and download the chart as SVG or its settings as JSON.Editable SVG / PNG / JSON · ConvertCustom Infographic BuilderMake an infographic from CSV data. Choose bars, dots or number cards, edit the artwork and download SVG or PNG images.CSV / JSON / SVG / PNG · ConvertData Quality VisualizerCheck CSV data for missing values, duplicate rows and unusual numbers. Explore charts and download a column report.Slides / HTML / JSON · ConvertData Story Slide BuilderTurn data into a slide presentation. Add charts and notes, arrange slides and download a presentation that opens in a browser.Vega-Lite / SVG / JSON · ConvertDeclarative Chart BuilderBuild a Vega-Lite chart from CSV data. Choose columns, chart marks and summaries, then save the chart and its settings.Functions / JSON / SVG / PNG · ConvertFunction Graphing PadPlot up to six math functions together. Change values and graph ranges, zoom in and download the chart.CSV / JSON / SVG / PNG · ConvertHierarchical Data ExplorerShow nested JSON as a treemap, sunburst or icicle chart. Open each branch to explore its values and save an image.CSV / JSON / SVG / PNG · ConvertInteractive Chart StudioMake bar, line, scatter, pie and other charts from CSV data. Choose columns, group values and save your chart project.CSV / JSON / SVG / PNG · ConvertMeasured Data Surface ViewerTurn x, y and z measurements into a 3D surface. Rotate the view, add contour lines and download the chart.CSV / JSON / SVG / PNG · ConvertPersonal History TimelineMake a timeline of personal events. Add dates, groups and notes, then search your history and save an editable copy.CSV / JSON / SVG / PNG · ConvertPersonal Progress DashboardTrack reading, habits and projects with charts. Add entries, set targets and save a copy of your dashboard.CSV / JSON / SVG / PNG · ConvertProject Milestone ViewerSee project milestones on a timeline. Add dates and notes, group related work and focus on a chosen date range.CSV / JSON / SVG / PNG · ConvertSensor Comparison DashboardCompare sensor readings on shared or separate charts. Pick a time range and review missing values and number summaries.CSV / JSON / SVG / PNG · ConvertSmall Multiples ExplorerCompare groups of data in matching charts. Use histograms, box plots or violin plots with the same number scale.CSV / JSON / SVG / PNG · ConvertTime-Series Log ViewerPlot timestamped CSV measurements over time. Zoom into a range, spot gaps and download a summary of the selected data.

Data & Calculators: Chemistry Calculators

Calculator · CalculateAcid pKa from Ka or Buffer MeasurementsCalculate pKa from a positive acid dissociation constant or estimate it separately from buffer pH and component concentrations.Calculator · CalculateActual Yield, Theoretical Yield & Recovery PercentageRelate measured product mass, theoretical product mass and their percentage ratio.Calculator · CalculateAir-to-Fuel Mass Ratio & Fuel PresetsRelate air mass, fuel mass and their ratio with fixed fuel presets or a custom air-to-fuel ratio.Calculator · CalculateArrhenius Rate, Temperature & Activation EnergySolve the Arrhenius relation for activation energy, first-order rate constant, frequency factor or absolute temperature with reversible unit conversion.Calculator · CalculateAvogadro Atoms, Moles & Sample MassConvert between atom count, amount in moles and sample mass using the exact Avogadro constant and your entered molar mass.Calculator · CalculateBinary Mixture Mole Fraction & MolalityFind solute mole fraction and mole percent in a two-component mixture, with optional molality from solvent molar mass.Calculator · CalculateBuffer pH, Acid–Base Ratio & pKaSolve the Henderson–Hasselbalch relationship between weak-acid buffer pH, pKa and the conjugate-base-to-acid concentration ratio.Calculator · CalculateCalcium & Magnesium to CaCO₃ Water HardnessEstimate calcium-and-magnesium hardness as CaCO₃, classify the result, or recover one ion concentration from measured hardness and the other ion.Calculator · CalculateChromatography Bed, Flow & Residence TimeCalculate nominal bed residence time from linear flow velocity or cylindrical bed dimensions and volumetric flow.Calculator · CalculateCOD from Blank and Sample TitrationsCalculate an uncorrected titrimetric chemical oxygen demand from blank/sample FAS volumes, normality and sample aliquot volume.Calculator · CalculateConserved-Solute Concentration & VolumeSolve the concentration-volume balance for a fixed amount of solute before and after a volume change.Calculator · CalculateCubic Crystal Plane Spacing & Miller IndicesCalculate interplanar spacing for a cubic lattice from its lattice constant and signed integer Miller indices, with material presets.Calculator · CalculateDilute-Water pH, pOH & Hydrogen-Ion EstimateConvert pH, pOH and approximate hydrogen-ion concentration in dilute water using pKw = 14 near 25°C.Calculator · CalculateEnzyme Specific Activity & Required MassFind enzyme preparation mass from its specific activity, a target activity per volume and final volume.Calculator · CalculateEquivalent Mass, Concentration & Solution VolumeRelate reaction-specific equivalent mass to solute mass, final solution volume and equivalent concentration.Calculator · CalculateFormula Hydrogen Deficiency & UnsaturationCalculate the hydrogen-deficiency index from carbon, hydrogen, nitrogen and halogen atom counts.Calculator · CalculateGalvanic Cell Reduction-Potential DifferenceSubtract anode reduction potential from cathode reduction potential for a positive galvanic-cell potential.Calculator · CalculateGibbs Energy from Enthalpy, Entropy & TemperatureRelate Gibbs energy change, enthalpy change, entropy change and absolute temperature on a common process basis.Calculator · CalculateGibbs Phase Rule with Fixed ConditionsCalculate equilibrium degrees of freedom from independent components and phases, with zero, one or two fixed temperature/pressure constraints.Calculator · CalculateGraham’s Gas-Rate & Molar-Mass ComparisonCompare ideal gas effusion rates and molar masses using Graham’s inverse-square-root relationship.Calculator · CalculateIdeal-Gas Sample Molar MassEstimate a gas sample’s molar mass from mass, absolute pressure, volume and temperature using the ideal-gas law.Calculator · CalculateIsoelectric Point from Two Bracketing pKa ValuesEstimate pI from the two acid-dissociation pKa values surrounding a neutral species, or recover a missing pKa using the same two-step charge model.Calculator · CalculateLimiting-Reactant Stoichiometric Product YieldCalculate theoretical product amount and mass from a known limiting reactant and balanced reaction coefficients.Calculator · CalculateMass Concentration & Molar ConcentrationConvert positive mass-per-volume concentration to amount-per-volume concentration using the solute molar mass.Calculator · CalculateMass Percent & Density to Molar ConcentrationConvert mass percentage to molarity or solve a related quantity using solution density and a preset or custom solute molar mass.Calculator · CalculateMass-Fraction ppm to Molarity at 1 kg/LConvert mass-based parts per million or billion to molarity at the fixed solution-density assumption of 1 kg/L.Calculator · CalculateMolecular-Orbital Electron Counts & Bond OrderFind molecular-orbital bond order from bonding and antibonding electron counts, including zero net bond order.Calculator · CalculateNominal Tank Detention Time from Volume & FlowEstimate nominal hydraulic detention time from operating liquid volume and flow, or derive volume from constant base area and liquid depth.Calculator · CalculateOptical Absorbance, Concentration & TransmissionRelate decadic absorbance, percent transmittance, concentration, optical path and molar absorption coefficient.Calculator · CalculateOrganic Formula Degree of UnsaturationCalculate double-bond equivalents from carbon, hydrogen, nitrogen and halogen counts under the standard neutral-molecule valence model.Calculator · CalculateQ10 Rate Change per Ten DegreesCalculate the Q10 temperature coefficient from two positive rates at different temperatures, with reversible rate and temperature solving.Calculator · CalculateRadionuclide Activity, Specific Activity & Half-LifeCalculate activity and specific activity from the mass, molar mass and half-life of a single radionuclide using the exact Avogadro constant.Calculator · CalculateReaction Equivalent Concentration from Mass & VolumeCalculate reaction-specific equivalents per volume from solute mass and a stated equivalents-per-mass factor.Calculator · CalculateReaction Product Mass & Percent YieldCalculate percent yield from actual and theoretical product masses, or solve either mass with selectable mass units.Calculator · CalculateSample Mass, Moles & Molecule CountConvert sample mass, molar mass, amount of substance and molecule count with scientific notation and selectable mass and mole units.Calculator · CalculateSolute Amount, Target Concentration & Final VolumeFind final solution volume from a known solute amount and desired amount concentration.Calculator · CalculateSolute Mass, Solution Volume & MolarityRelate solute mass, molar mass and final solution volume to mass concentration and molarity.Calculator · CalculateSolute Moles, Solvent Mass & MolalityCalculate molality from solute amount and solvent mass, with an optional solute-mass and molar-mass calculation.