All 40 Free Online Calculators
Every calculator tool available on SmartCalc — organised by category. All free, instant, no signup, no data stored.
🔢 Math Calculators
Standard CalculatorMath
Scientific CalculatorMath · 30+ functions
Percentage CalculatorMath · 3 modes
Ratio CalculatorMath
Fraction CalculatorMath
Quadratic SolverMath · ax²+bx+c=0
Statistics CalculatorMath · Mean, SD, more
Matrix CalculatorMath · 2×2 operations
Roman NumeralsMath · 1–3999
Number Base ConverterMath · BIN OCT HEX