Free online tools for physics formulas, electronics circuit analysis, resistor color codes, and chemistry solution preparation.
Calculate voltage, current, resistance, and electrical power with interactive circuit formulas.
Decode 4-band and 5-band resistor color codes with live visual previews and tolerance ranges.
Calculate solution molarity, solute mass in grams, and solvent volume with dilution formulas.
Calculate material density, mass, and volume with reference density tables for common substances.
Calculate IPv4 network boundaries, CIDR prefixes, wildcard masks, usable host ranges, and binary bit masks.
Calculate appliance electrical power consumption and electricity bill costs across daily, monthly, and yearly periods.
Calculate mechanical kinetic energy, mass, and velocity with comprehensive multi-unit physics conversions.
Calculate series current-limiting resistor value, nearest standard E24 rating, and dissipated wattage for LEDs.
Scientific experiments and electronic circuit assembly require precision, reliable unit conversions, and quick arithmetic. Whether you are sizing a current-limiting resistor on an Arduino breadboard, preparing an exact molar buffer in a chemistry laboratory, or calculating the buoyant force of a metal cylinder in physics class, this suite provides instant, browser-based calculation utilities.
Electrical circuit engineering depends on fundamental mathematical relationships between voltage, electric current, resistance, and power:
Laboratory workflows require fast, accurate preparation of solutions and material measurements:
All calculators in this collection are built for speed, privacy, and practical accuracy. Calculations occur entirely on your device with zero server latency, no registration requirements, and immediate updates as you type or change input parameters.
Given any two known variables among voltage (V), current (I), resistance (R), and electrical power (P), the calculator computes the remaining two metrics using V = I * R and P = V * I.
It decodes both standard 4-band resistors and high-precision 5-band resistors into exact resistance values, multiplier magnitudes, and manufacturer tolerance percentages.
It uses the formula Molarity = moles of solute / volume in liters, and Mass = Molarity * Volume * Molar Mass to calculate solution concentration, required solute grams, or target solvent volume.
Yes, by rearranging rho = m / V, it calculates density given mass and volume, mass given density and volume (m = rho * V), or volume given mass and density (V = m / rho).
Yes, all calculations run locally in your client web browser via JavaScript. No experiment data, circuit values, or chemical quantities are transmitted to external servers.