Comparing payload capacities head to head

When you talk about rockets, size matters. But not in the way you might think. For American men in their 20s who follow spaceflight, the flashy specs—thrust, height, reusability—often get the hype. What actually determines a rocket’s value? Payload capacity. That’s the raw mass a rocket can haul to low Earth orbit, geostationary transfer orbit, or beyond. It’s the difference between launching a single satellite and launching a whole space station module. So let’s cut through the marketing noise and compare the giants of the launchpad head to head on the only metric that truly separates the workhorses from the toys.

Start with the heavyweight champion: SpaceX’s Starship. Still in development but already tested, Starship is designed to carry over 100 metric tons to low Earth orbit in its fully reusable configuration. That’s not a typo. One hundred metric tons. To put that in perspective, the International Space Station weighs about 420 metric tons. You could build a new station in four launches. Even in expendable mode, Starship could theoretically push up to 150 metric tons. That makes it the king of raw capacity right now, even if it hasn’t yet achieved operational maturity. The catch? The upper stage needs orbital refueling to go beyond LEO, but for sheer mass-to-orbit, Starship is the undisputed bully on the block.

Then comes the workhorse of the current era: the Falcon Heavy. Every time one of these three-core beasts lifts off, it can deliver about 63.8 metric tons to LEO in expendable mode. In its partially reusable configuration—where the side boosters land back on drone ships—you’re looking at roughly 30 metric tons. That’s enough to send a fully loaded school bus to orbit. For commercial operators, Falcon Heavy is the go-to for heavy commsats or deep space probes. It’s proven, it’s reliable, and it redefines what we consider routine heavy lift.

Now, don’t sleep on the old guard. The Delta IV Heavy, built by United Launch Alliance, holds a legitimate spot at the table with a payload of about 28.8 metric tons to LEO. It’s expensive—think north of $400 million per launch—and it’s being phased out in favor of the Vulcan Centaur, but when you absolutely need to get something heavy to a precise orbit, the Delta IV Heavy has a track record that’s hard to argue with. It doesn’t do reusability. It doesn’t do flashy landings. It just does its job, and it does it well.

Speaking of Vulcan Centaur, ULA’s next-gen rocket targets a maximum payload of around 27.2 metric tons to LEO. That’s less than Falcon Heavy, but it comes with a critical advantage: reliability and government certification. For national security payloads, you don’t want a rocket that’s still shaking out bugs. Vulcan Centaur offers a proven engine design (the BE-4 from Blue Origin) and a modular upper stage that can handle both low orbit and deep space missions. It’s not the strongest, but it’s the safest bet for the most demanding customers.

Then you’ve got the international contenders. Russia’s Proton-M, still flying despite its age, can deliver roughly 23 metric tons to LEO. It’s cheap by Western standards—around $65 million per launch—but it uses toxic hypergolic propellants that make handling a nightmare. Meanwhile, China’s Long March 5B, used for launching space station modules, manages about 25 metric tons to LEO. It’s a serious competitor in the Asian market, but its limited launch rate and secretive operations make it less accessible for global commercial customers.

What about the new kids on the block? Blue Origin’s New Glenn, expected to fly soon, targets 45 metric tons to LEO in a reusable configuration. That’s less than Starship but more than Falcon Heavy for a reusable vehicle. The wildcard is the upper stage—Blue Origin plans to offer a second stage optimized for high-energy orbits, which could make New Glenn the go-to for direct-to-geostationary satellite delivery. But until it flies, the numbers are just promises.

Finally, let’s not forget the small-sat launchers like Rocket Lab’s Electron, which maxes out at about 300 kilograms to LEO. That’s not even one metric ton. These rockets aren’t competing in the heavy lift category, but they fill a niche for rapid, dedicated launches. If you need to get a single CubeSat up fast, you don’t need 100 tons. You need a cheap, reliable ride. For that, the little guys serve their purpose.

So what’s the takeaway? If you want to move the most mass per launch, Starship is the inevitable future. If you need proven capability today, Falcon Heavy is the gold standard. If you’re flying Uncle Sam’s hardware, Vulcan Centaur is the safe play. And if you’re just trying to get a small experiment to orbit, the smaller rockets will get you there without breaking the bank. Payload capacity isn’t the only spec that matters, but it’s the one that separates the giants from the also-rans. Watch the numbers, not the hype.