PanaKit / Calculators
Free Online Calculators
130+ free calculators across 8 categories. Fast, accurate, and completely ad-free.
PanaKit's free online calculators cover everything from math and science to health, finance, electrical engineering, and lighting — all in one place. Each calculator delivers instant, accurate results with no downloads, no accounts, and no ads. Whether you need a Percentage Calculator, a BMI Calculator, or an Ohm's Law Calculator, you'll find it below.
Health & Fitness Calculators
6 toolsTime Calculators
4 toolsGrade Calculators
7 toolsFinancial Calculators
7 toolsMath Calculators
46 toolsAddition CalculatorSubtraction CalculatorMultiplication CalculatorDivision CalculatorPercentage CalculatorPercentage Change CalculatorPercentage Increase CalculatorPercent Error CalculatorAverage CalculatorWeighted Average CalculatorStandard Deviation CalculatorVariance CalculatorFractions CalculatorAdding Fractions CalculatorSubtracting Fractions CalculatorMultiplying Fractions CalculatorDividing Fractions CalculatorSimplifying Fractions CalculatorSquare Root CalculatorRoot CalculatorExponents CalculatorExponential Growth CalculatorFactorial CalculatorLog CalculatorLn CalculatorAntilog CalculatorSine CalculatorCosine CalculatorTangent CalculatorArcsin CalculatorArccos CalculatorArctan CalculatorTrigonometry CalculatorPythagorean Theorem CalculatorQuadratic Equation SolverRatio CalculatorGCF CalculatorLCM CalculatorRemainder CalculatorScientific Notation CalculatorHex CalculatorComplex Numbers CalculatorConvolution CalculatorRandom Number GeneratorOnline Math CalculatorSimple Math Calculator
Wire Calculators
4 toolsLighting Calculators
14 toolsCandela to Lumens CalculatorCandela to Lux CalculatorLumens to Candela CalculatorLumens to Lux CalculatorLumens to Watts CalculatorLumens to Millicandela CalculatorMillicandela to Lumens CalculatorLux to Candela CalculatorLux to Lumens CalculatorLux to Watts CalculatorLux to Footcandles CalculatorFootcandles to Lux CalculatorWatts to Lumens CalculatorWatts to Lux Calculator
Electrical Calculators
42 toolsOhm's Law CalculatorPower CalculatorPower Factor CalculatorVoltage Divider CalculatorWatts to Amps CalculatorWatts to Volts CalculatorWatts to kWh CalculatorWatts to VA CalculatorWatts to kVA CalculatorWatts to Joules CalculatorAmps to Watts CalculatorAmps to Volts CalculatorAmps to kW CalculatorAmps to kVA CalculatorAmps to VA CalculatorVolts to Amps CalculatorVolts to Watts CalculatorVolts to kW CalculatorVolts to Joules CalculatorVolts to eV CalculatorkW to Amps CalculatorkW to Volts CalculatorkW to kWh CalculatorkW to VA CalculatorkW to kVA CalculatorkWh to kW CalculatorkWh to Watts CalculatorkVA to Amps CalculatorkVA to Watts CalculatorkVA to kW CalculatorkVA to VA CalculatorVA to Amps CalculatorVA to Watts CalculatorVA to kW CalculatorVA to kVA CalculatorJoules to Watts CalculatorJoules to Volts CalculatoreV to Volts CalculatorElectricity Bill CalculatorEnergy Consumption CalculatorEnergy Cost CalculatorWatts-Volts-Amps-Ohms Calculator