All animal life, by weight.

Figures are the headline mammal-biomass estimates from Bar-On, Phillips & Milo, “The biomass distribution on Earth,” PNAS 2018: livestock ≈0.1 Gt C (dominated by cattle and pigs; poultry are birds and counted separately), humans ≈0.06 Gt C, wild mammals ≈0.007 Gt C. “Biomass” here means carbon mass, the standard ecological unit — roughly the mass of carbon in an organism's dry tissue, not what a scale would read. Gt C figures run about 5–10× smaller than live/wet body weight (water and non-carbon tissue make up most of an animal's actual weight), so these numbers shouldn't be compared directly to "how much do you weigh." (0.1 + 0.06) / 0.007 ≈ 22.9× — check it yourself against the source numbers above. The paper states these as best estimates with real scientific uncertainty (order-of-magnitude confidence for some categories, wild mammals among the harder ones to pin down), not a precise census.