Visible Light Spectrum – Wavelengths, Frequencies & Colors of Visible Light
wavelengths and frequencies of all colors from violet (380 nm) to red (700 nm). Interactive spectrum tool, color lookup calculator, and reference tables.
Calculators
Wavelength to Frequency Calculator – Convert nm, m & Hz Instantly
wavelength to frequency calculator – convert nm to Hz, Hz to nm, meters to Hz, and MHz to nm instantly. Includes electromagnetic spectrum chart and photon energy calculator.
Frequency to Period Calculator – Convert Hz to Seconds, ms & ns Instantly
frequency to period calculator – convert Hz to seconds, milliseconds, microseconds and nanoseconds instantly. Includes period to frequency converter, reference table, and step-by-step examples.
Frequency Distribution Calculator – Table Generator with Relative & Cumulative Frequency
Free frequency distribution calculator -create frequency tables with relative frequency, cumulative frequency, and histogram charts. Works for ungrouped and grouped data.
Heat Transfer Coefficient Calculator | Convection, Film & Overall h Values
calculate convective heat transfer rate, overall U value, and h from Nusselt number. Includes reference values for air and water with unit converter.
Psychrometric Calculator | Wet Bulb & Dry Bulb Temperature Calculator
Use our free Wet Bulb Calculator to find relative humidity, dew point,
and psychrometric values instantly. Enter dry bulb & wet bulb temperature
and get step-by-step results. Perfect for students & engineers
Kinetic Energy Calculator | Find KE, Velocity,or Mass Instantly
Calculate kinetic energy using KE = ½mv². Solve for kinetic energy, velocity, or mass in Joules, eV, or ft·lb. Free physics calculator with step-by-step worked examples and formula derivation
Cylinder Volume Calculator | Tank Capacity in Gallons,Liters & Cubic Feet
Free cylinder volume calculator find tank capacity in gallons, liters, and cubic feet. Includes rectangular tank, oval, pipe, and unit converter. Step-by-step working shown.
Percent Composition Calculator | Find Composition by Mass of Any Compound
find the percent composition by mass of any compound from its chemical formula or mass data. Step-by-step working with examples and practice problems.
Empirical Formula Calculator – Find Empirical & Molecular Formula from Percent Composition
Free empirical formula calculator – find the empirical and molecular formula from percent composition or element masses. Step-by-step working with examples for every calculation.