Wolfram Alpha, Google Calculator, Soulver, SpeedCrunch, Numi, HiPER Scientific Calculator, fxSolver, Graph.tk, Deskcalc, Simple Calculator, Numbat, Qalculate!, GeoGebra Scientific Calculator, Calculator++, CalcPP, Calcbar, Unit Wolf, VAT Calculators, Calcuverter, Supercalc, Converters360, Getmathcharts.com, Caracal Diagnosis, MultiCalc, Sellertour PayPal fee Calculator, Design Calculator are some alternatives to Integral Calculator.