Science & Lab · Page 12
Explore physical quantities, motion, circuits, waves and chemical formula units with explicit units and model assumptions.
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Chemistry
Concentration Basis Converter
Learning & Education · High School · Science & LabConvert mass fraction, mass percent, mass ppm, g/L, mg/L and mol/L using an explicit solution density and solute molar mass.
Open calculator ↗pH and Ion Concentration Calculator
Learning & Education · High School · Science & LabConvert pH and ion concentrations or model a single strong or weak monoprotic acid/base. Include water autoionization instead of ignoring dilute-solution effects.
Open calculator ↗Solubility and Crystallization Calculator
Learning & Education · Middle School · High School · Science & LabEstimate dissolved and solid solute before and after a solubility change. Separate newly formed crystals from solid already present at the start.
Open calculator ↗Chemical Equation Balancer
Learning & Education · Middle School · High School · Science & LabBalance a neutral chemical equation using exact element conservation. Return the smallest positive integer coefficients and an atom-count check for every element.
Open calculator ↗Limiting Reactant and Yield Calculator
Learning & Education · Middle School · High School · Science & LabUse an atom-balanced equation and available reactant masses to find the limiting reactant, leftover material and theoretical product masses.
Open calculator ↗Optics
Physics
Photon Wavelength and Energy Converter
Learning & Education · High School · Science & LabConvert vacuum wavelength, frequency and energy per photon using the exact SI defining constants. Select independent input and output units.
Open calculator ↗Thermal Expansion Calculator
Learning & Education · High School · Science & Lab · Construction & DIY · Design & DrawingCalculate the dimensional change from a mean linear expansion coefficient and a temperature change. Compare linear, area and volume models.
Open calculator ↗Layered Heat Conduction Calculator
Learning & Education · High School · Science & Lab · Construction & DIYCalculate steady conductive heat flow through layers in series. Inspect thermal resistance, heat flux, transferred energy and interface temperatures.
Open calculator ↗Pipe Flow Rate and Velocity Calculator
Learning & Education · High School · Science & Lab · Construction & DIYConvert volumetric flow and average speed in a full circular pipe. Calculate mass flow and the time to fill an entered volume.
Open calculator ↗Series AC Impedance Calculator
Learning & Education · High School · Science & LabCalculate impedance, RMS current, phase, power factor and power for a resistor with optional series inductance and capacitance.
Open calculator ↗Transformer Turns and Voltage Calculator
Learning & Education · High School · Science & LabCalculate the ideal AC voltage ratio and a simplified efficiency-based current and power balance. Keep ideal voltage scaling separate from entered losses.
Open calculator ↗Projectile Motion Calculator
Learning & Education · High School · Sports & Fitness · Science & LabCalculate flight time, horizontal range, peak height and impact velocity for a thrown object. Enter launch height and gravity, mix units and inspect the trajectory.
Open calculator ↗Decibel and Ratio Calculator
Learning & Education · High School · Science & Lab · IT & CommunicationConvert power or root-power amplitude ratios to decibels and back. Add independent source levels that share a reference, using logarithmic power addition.
Open calculator ↗Rotational Speed and Rim Speed Calculator
Learning & Education · High School · Science & Lab · Automotive · Design & DrawingConvert rpm, angular speed and tangential rim speed using a radius or diameter. Find frequency, period and centripetal acceleration with explicit units.
Open calculator ↗Humidity and Dew Point Calculator
Learning & Education · Middle School · High School · Science & LabEstimate dew point from air temperature and relative humidity, or relative humidity from dew point. Compare actual and saturated water-vapor pressures.
Open calculator ↗P–S Wave Distance Calculator
Learning & Education · Middle School · High School · Science & LabEstimate source-path distance from a P/S arrival-time difference and entered wave speeds. Compare both travel times in a uniform-medium model.
Open calculator ↗Mechanical Work Calculator
Learning & Education · Middle School · High School · Science & LabCalculate work done by a constant force over a displacement. Account for the angle between force and motion, including zero and negative work.
Open calculator ↗Power and Efficiency Calculator
Learning & Education · Middle School · High School · Science & LabCompare input energy with useful output over the same time. Find average input/output power, energy loss and conversion efficiency.
Open calculator ↗Reflection and Refraction Calculator
Learning & Education · Middle School · High School · Science & LabFind reflected and refracted ray directions from incidence angle and two refractive indices. Detect total internal reflection and show the critical angle.
Open calculator ↗Echo Distance Calculator
Learning & Education · Middle School · High School · Science & LabFind one-way reflector distance, echo return time or sound speed. Keep the measured round trip separate from the distance to the reflecting surface.
Open calculator ↗Statistics
Mean Confidence Interval Calculator
Learning & Education · High School · Science & LabCalculate a two-sided confidence interval for a population mean from summary statistics. Choose Student t with sample SD or z with a known population SD.
Open calculator ↗Sample Size Planning Calculator
Learning & Education · High School · Science & LabEstimate the sample count needed for a target margin of error for a mean or a proportion. Optionally apply a finite-population correction and round upward.
Open calculator ↗Sampling Without Replacement Calculator
Learning & Education · High School · Science & LabFind exact-count and tail probabilities when drawing from a finite population without replacement. Inspect feasible success counts and exact combinatorial fractions.
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