Choose by the relationship
Pick a broad calculator when one task covers several formulas. Choose a focused calculator when the quantities and relationship are already clear, such as F = ma for force or PV = nRT for an ideal gas.
Chemistry calculators for solutions and reactions
The Chemistry Calculator covers pH and pOH, molarity, dilution, molar mass, limiting-reagent stoichiometry, percent yield, solution preparation, Beer-Lambert absorbance, and specific heat in one interface.
- Molar Mass Calculator accepts a supported chemical formula, including parentheses and hydrates, and shows the element breakdown.
- Molarity Calculator solves for amount of solute, solution volume, or molarity when the other two quantities are supplied.
- Dilution Calculator solves one missing value in
C1V1 = C2V2from stock concentration, stock volume, target concentration, and final volume. - pH Calculator solves pH, pOH, hydrogen ion concentration, or hydroxide ion concentration from one supplied value.
- Stoichiometry Calculator uses a balanced chemical equation and mole ratios to calculate a reactant or product quantity.
- Percent Yield Calculator calculates percent yield from actual and theoretical yield in compatible units.
- Beer-Lambert Law Calculator solves absorbance, concentration, path length, or molar or mass absorptivity.
- Specific Heat Calculator calculates heat transfer from mass, specific heat capacity, and temperature change.
Physics calculators for motion, force, and energy
The Physics Calculator covers force, acceleration, momentum, kinetic and potential energy, work, power, pressure, density, the ideal gas law, Ohm's law, voltage drop, battery runtime, wavelength, photon energy, and half-life.
- Acceleration Calculator calculates acceleration from a change in velocity and elapsed time.
- Force Calculator applies
F = mato mass and acceleration. - Momentum Calculator calculates linear momentum from mass and velocity.
- Kinetic Energy Calculator calculates kinetic energy from mass and speed using
KE = 1/2mv^2. - Potential Energy Calculator calculates gravitational potential energy from mass, height, and a gravity assumption.
- Work Calculator calculates mechanical work from force, displacement, and angle.
- Power Calculator calculates power from work or energy and time.
- Pressure Calculator calculates pressure from entered force and area.
- Density Calculator solves density, mass, or volume with
rho = m / V.
Electrical, wave, and optics calculators
The Electrical Calculator covers watts, volts, amps, resistance, resistor combinations, voltage drop, wire-size estimates, battery runtime, battery-bank sizing, and energy consumption.
- Ohm's Law Calculator solves voltage, current, resistance, or power from two known values using Ohm's law and the power formula.
- Battery Runtime Calculator calculates runtime from battery capacity, load, voltage, and efficiency.
- Voltage Drop Calculator calculates voltage drop across a wire run from length, current, conductor material, gauge, and supply voltage.
- Wavelength Calculator solves wavelength, frequency, or wave speed when the other two wave-equation values are entered.
- Photon Energy Calculator calculates photon energy from wavelength or frequency using
E = hf = hc/lambda. - Optics Calculator covers thin-lens and mirror image distance, magnification, focal length, optical power, and wavelength-frequency relationships.
Gas, fluid, and radioactive-decay calculations
- Ideal Gas Law Calculator solves pressure, volume, amount of gas, or temperature using
PV = nRT. - Fluid Dynamics Calculator calculates Reynolds number, flow velocity, flow rate, and pipe-flow pressure drop, then classifies flow as laminar, transitional, or turbulent.
- Half-Life Calculator calculates the remaining quantity of a decaying substance from its initial amount, half-life, and elapsed time.
Each focused page states the quantities it accepts and the relationship it applies. Open Calculators for a different category, such as finance, health, or date and time.
Common starting points
- For a dilution, enter stock concentration, stock volume, target concentration, and final volume, then solve for the missing value.
- For kinetic energy, supply mass and speed and apply
KE = 1/2mv^2. - For voltage drop, enter conductor material, gauge, length, current, and supply voltage.
- For photon energy, enter wavelength or frequency and review the calculated energy with its supplied units.
When a broad calculator fits
Choose the Chemistry Calculator when one chemistry task may need several modes. Choose the Physics Calculator for a problem involving several listed physics relationships. Choose the Electrical Calculator for a project involving circuits and power. A focused calculator fits when the quantity and formula are already clear.
Frequently asked questions
Which science calculator should I use for a chemistry problem?
Use the Chemistry Calculator for pH, molarity, dilution, molar mass, stoichiometry, percent yield, solution preparation, Beer-Lambert absorbance, or specific heat. Choose a focused calculator when you already know the relationship, such as C1V1 = C2V2 for dilution.
What calculator solves force, acceleration, or momentum?
Use the focused Force Calculator, Acceleration Calculator, or Momentum Calculator when one of those quantities is the task. Use the Physics Calculator when the same problem also involves energy, work, pressure, density, or another listed physics relationship.
What is the difference between the Electrical Calculator and Ohm's Law Calculator?
The Electrical Calculator covers several electrical modes, including resistor combinations, voltage drop, wire-size estimates, battery runtime, battery-bank sizing, and energy consumption. The Ohm's Law Calculator focuses on voltage, current, resistance, or power from two known values.
What should I check before using a science-calculator result?
Check the input labels, selected units, displayed formula, and stated assumptions on the child page. A wrong unit or an unsuitable model changes what the number represents.