Complex Number to Polar Form a+bi → r∠θ. a b r 5 θ (°) 53.13 Step-by-step with your numbers: 1. Values used: 2. a = 3 3. b = 4 4. r = 5 5. θ = 53.13° Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Polar form r∠θ. FAQ Radians? θ in rad = atan2(b,a). Related calculators Complex Number Magnitude |a+bi| = √(a²+b²). Complex Conjugate Calculator a+bi → a−bi.