Science Tools
Scientific calculators for chemistry, physics, and research. Calculate molecular weights, determine pH levels, and perform scientific computations. Essential tools for students, researchers, and professionals in STEM fields.
Molecular Weight Calculator
Calculate the molecular weight of chemical compounds from their formulas. Supports complex formulas with parentheses, subscripts, and multiple elements.
pH Calculator
Calculate pH, pOH, H+ concentration, and OH- concentration. Convert between pH and hydrogen ion concentration with automatic classification of acidic, basic, or neutral solutions.
Solution Dilution Calculator
Calculate solution dilutions using C1V1=C2V2. Solve for stock concentration, stock volume, final concentration, or final volume with unit-aware inputs and dilution factor.
Density Calculator
Calculate density, mass, or volume using the density formula. Supports multiple units including kg/m³, g/cm³, g/mL, lb/ft³, and more. Perfect for physics, chemistry, and engineering calculations.
Amps to Watts Calculator
Convert amps and volts to watts for DC, single-phase AC, and three-phase AC circuits. Optional power factor for AC. Handy for sizing loads, breakers, and understanding electrical power.
Watts to Amps Calculator
Convert watts and volts to amps for DC, single-phase AC, and three-phase AC (line-to-line). Optional power factor. Ideal for breaker and wire sizing from nameplate power.
Kilowatts to Amps Calculator
Convert kilowatts and volts to amps for DC, single-phase AC, and three-phase AC (line-to-line). Optional power factor. Same calculation as watts-to-amps, with a kW-first input.
Amps to Volts Calculator
Find voltage from current using watts and amps (DC and AC with power factor) or Ohm's law with resistance. Complements amps-to-watts and watts-to-amps for the same circuit assumptions.
Volts to Amps Calculator
Find current from voltage using watts and volts (DC and AC with power factor) or Ohm's law (I = V ÷ R). Same formulas as watts-to-amps in power mode; pairs with amps-to-volts for Ohm's law.
Watts to Volts Calculator
Find voltage from watts using current (DC/AC with power factor) or resistive DC via V = √(P × R). Watts-first workflow; current mode matches Amps to Volts power math.
Volts to Watts Calculator
Find power from voltage using current (DC/AC with power factor) or resistive DC via P = V² ÷ R. Volts-first workflow; current mode matches Amps to Watts.
Ohm's Law Calculator
Solve for voltage, current, resistance, and DC power from any two of V, I, R, and P using V = I × R and P = V × I = I² × R = V² ÷ R. Includes AC real-power reference matching our other electrical tools.
VA to Watts Calculator
Convert apparent power (VA) to real power (W) using power factor: W = VA × PF. Useful for UPS sizing, generators, and AC load planning.
Watts to VA Calculator
Convert real power (W) to apparent power (VA) using power factor: VA = W ÷ PF. Useful for UPS and inverter capacity planning with AC loads.
kVA to Amps Calculator
Convert apparent power (kVA) and voltage to line current in amps for DC, single-phase AC, and balanced three-phase AC (line-to-line). No power factor required.
Power Factor Calculator
Calculate power factor from watts and VA using PF = W ÷ VA. Helpful for AC load analysis, UPS sizing, and checking how efficiently apparent power becomes real power.