The adult reference
The DGE reference for healthy adults aged 19–64 is 0.8 g per kilogram of body weight daily. From 65, 1.0 g/kg is an estimated value. Normal/reference weight matters for overweight people; the tool therefore does not multiply every entered weight indiscriminately.
Everyday use
Pulses, tofu, dairy, eggs and other suitable foods can supply protein. Consider the overall diet. A powder is optional, not proof of effective training. The reference is neither an individual minimum for everyone nor an automatic optimum for strength training.