Starship's theoretical LEO payload of 150 tonnes dwarfs every rocket ever built, but the Saturn V still holds the record for the heaviest payload actually delivered to orbit in a single launch.
Quick answer: 1. SpaceX Starship (Block 2), 2. Saturn V, 3. N-1 (L3), 4. Energia, 5. SLS Block 1B, 6. SLS Block 1, 7. Falcon Heavy (expendable), 8. Long March 5B, 9. Proton-M, 10. Ariane 5 (ECA).
Payload capacity to low Earth orbit (LEO) is the standard benchmark for a rocket's lifting power. It determines what a launch vehicle can deliver — satellites, space station modules, crew capsules, or deep-space probes. This list ranks the ten most powerful rockets ever built by their maximum payload capacity to low Earth orbit, from the mighty Saturn V that carried Apollo astronauts to the Moon to SpaceX's Starship, which aims to open the era of super-heavy interplanetary transport. Figures are drawn from manufacturer specifications and verified by NASA and ESA documentation.
Starship is the largest and most powerful rocket ever built, with a fully reusable design and a projected LEO payload of 150 tonnes in its Block 2 configuration. The vehicle stands 121 metres tall and produces 74,000 kN of thrust from 33 Raptor 2 engines — roughly double the power of the Saturn V.
The Apollo-era Moon rocket remains the most powerful rocket ever successfully flown, delivering up to 140 tonnes to LEO across 13 launches. Its five F-1 engines in the first stage generated 35,100 kN of thrust and burned 2,000 tonnes of kerosene and liquid oxygen in under three minutes.
The Soviet Union's answer to the Saturn V was designed to carry cosmonauts to the Moon but never completed a successful flight. Its LEO payload capacity was estimated at 95 tonnes across five stages with 30 NK-15 engines clustered on the first stage.
The Soviet super-heavy launcher was designed to launch the Buran space shuttle and could deliver 88 tonnes to LEO in its heavy configuration. It flew only twice — once carrying the Polyus military payload and once with Buran — before the program was cancelled.
NASA's Space Launch System in its evolved Block 1B configuration will deliver 83 tonnes to LEO with an upgraded Exploration Upper Stage. The first SLS flight (Artemis I, 2022) used the Block 1 version rated at 70 tonnes. The Block 1B is expected to debut in the late 2020s.
The initial version of NASA's Space Launch System, which launched the uncrewed Artemis I mission in 2022, delivers 70 tonnes to LEO. It uses a modified Space Shuttle main engine configuration with two solid-rocket boosters that produce 36,000 kN of combined thrust at liftoff.
SpaceX's partially reusable heavy lifter is the most powerful operational rocket today. In its fully expendable configuration it can lift 63.8 tonnes to LEO, though SpaceX typically lands the side boosters for reuse, reducing the payload to about 30 tonnes. Its maiden flight carried Elon Musk's Tesla Roadster into an Earth–Mars orbit.
China's most powerful rocket in service, the Long March 5B is a two-stage variant optimised for launching large modules to low Earth orbit. It delivered the Tianhe core module of the Chinese space station (22.5 tonnes) in 2021 and can lift up to 25 tonnes to LEO.
Russia's heavy-lift workhorse has been in service since 2001, capable of lifting 23 tonnes to LEO. It has flown over 100 missions, launching Russian military satellites, ISS modules, and commercial payloads including most of the world's geostationary communications satellites from the Baikonur Cosmodrome.
Europe's most powerful launcher, retired in 2023 after 117 flights, delivered 21 tonnes to LEO in its ECA configuration. It was the workhorse of the European space program, launching the James Webb Space Telescope, Rosetta, and numerous commercial telecom satellites before being succeeded by Ariane 6.
| # | Name | operator | firstLaunch | stages | reusable | status |
|---|---|---|---|---|---|---|
| 1 | SpaceX Starship (Block 2) | SpaceX | 2023 | 2 | Yes (both stages) | In development / testing |
| 2 | Saturn V | NASA | 1967 | 3 | No | Retired (1973) |
| 3 | N-1 (L3) | Soviet space program | 1969 | 5 | No | Cancelled (1974, 4 failed flights) |
| 4 | Energia | Soviet space program | 1987 | 2 + boosters | Boosters recoverable | Cancelled (1988, 2 flights) |
| 5 | SLS Block 1B | NASA | 2022 (Block 1) | 2 | No | In development (Block 1B) |
| 6 | SLS Block 1 | NASA | 2022 | 2 | No | Operational |
| 7 | Falcon Heavy (expendable) | SpaceX | 2018 | 2 + 2 boosters | Partial (boosters) | Operational |
| 8 | Long March 5B | CNSA (China) | 2020 | 2 | No | Operational |
| 9 | Proton-M | Roscosmos / Khrunichev | 2001 | 3 | No | Operational |
| 10 | Ariane 5 (ECA) | ESA / Arianespace | 1996 (latest config 2005) | 2 | No | Retired (2023) |
Rockets are ranked by the maximum payload mass (in tonnes) they can deliver to a reference low Earth orbit — typically 200 km circular at the appropriate inclination. Payload figures are the manufacturer's stated maximum capacity for the vehicle's most capable configuration, drawn from official documentation (NASA, SpaceX, Roscosmos, ESA, ULA, Arianespace) and corroborated against the Wikipedia list of super-heavy launch vehicles. The ranking uses the highest configuration flown or publicly finalized for each vehicle; retired vehicles (Saturn V, N1, Energia) are included at their historical certified capacity. Vehicles that have not yet flown (SLS Block 1B, Starship Block 2, Long March 9) are noted with their projected capacity.
Low Earth orbit is typically defined as an orbit between 160 km and 2,000 km above Earth's surface. The reference orbit used for payload capacity figures in this list is a 200 km circular orbit at an inclination matching the launch site's latitude.
Starship's 150-tonne figure is SpaceX's stated design target for the Block 2 vehicle. The current test vehicles have demonstrated refueling and orbital capability, but the full payload capacity has not yet been verified in a commercial mission. The Saturn V's 140-tonne figure is the highest mass actually delivered to orbit by any rocket in history.
The Space Shuttle's payload capacity to LEO was about 24.4 tonnes including the orbiter's own mass, which is comparable to the Long March 5B. However, the Shuttle's primary role was crew and cargo delivery, and its payload figures are not directly comparable to dedicated expendable launchers in this ranking.