  Let $\K$ be a field and $(f_1, \ldots, f_n)\subset \K[X_1, \ldots, X_n]$ be a
sequence of quasi-homogeneous polynomials of respective weighted degrees $(d_1,
\ldots, d_n)$ w.r.t a system of weights $(w_{1},\dots,w_{n})$. Such systems are
likely to arise from a lot of applications, including physics or cryptography.
We design strategies for computing Gr\"obner bases for quasi-homogeneous
systems by adapting existing algorithms for homogeneous systems to the
quasi-homogeneous case. Overall, under genericity assumptions, we show that for
a generic zero-dimensional quasi-homogeneous system, the complexity of the full
strategy is polynomial in the weighted B\'ezout bound $\prod_{i=1}^{n}d_{i} /
\prod_{i=1}^{n}w_{i}$. We provide some experimental results based on generic
systems as well as systems arising from a cryptography problem. They show that
taking advantage of the quasi-homogeneous structure of the systems allow us to
solve systems that were out of reach otherwise.
