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There is no verified, like-for-like public payload-capacity winner between Falcon 9 and Vulcan. United Launch Alliance publishes Vulcan capacities for specified booster configurations and reference orbits; SpaceX’s May 2025 Falcon guide says mass-to-orbit capability figures are available upon request. The clearest distinction is reusability: Falcon 9 is designed to recover and reuse its first stage, while the reviewed Vulcan materials do not establish an operational stage-reuse system. Their mission roles also differ: Falcon 9 serves satellite, rideshare, crew and cargo missions, while Vulcan’s published envelope includes several high-energy orbits and national-security launches.
At a glance
| Question | Falcon 9 | Vulcan |
|---|---|---|
| Public payload comparison | SpaceX’s May 9, 2025 guide says mass-to-orbit capabilities are available upon request; it does not provide a comparable public capacity table. | ULA publishes capacities by solid rocket booster (SRB) configuration and specified orbit. For its 200 km, 28.7-degree LEO-Reference orbit, listed capacities range from 10,800 kg with no SRBs to 27,200 kg with six. |
| Reusability | The first stage is designed to survive atmospheric entry and be recovered. The upper stage is not described as reusable in the guide. | The reviewed ULA specification and mission materials describe the vehicle and its missions but do not establish operational recovery and reuse of a Vulcan stage. |
| Examples of mission roles | Satellite launches, multi-satellite deployment, dedicated small-satellite rideshare, Earth-escape missions, and NASA Commercial Crew and cargo missions. | Launch services for LEO, ISS-orbit, polar LEO, MEO, GTO, GEO and trans-lunar injection; a four-SRB VC4S flew a national-security mission directly to GEO in February 2026. |
The short version is that the comparison depends on what is being launched and where it must go. ULA provides a configuration-by-configuration Vulcan performance table, but the reviewed SpaceX guide does not provide a matching Falcon 9 table. Reusability and service type are more directly documented differences: SpaceX describes recovery of Falcon 9’s first stage, and NASA documents Falcon 9’s crew and cargo roles. ULA’s material specifies Vulcan’s available booster configurations, orbit references and national-security use.
How to compare payload capacity fairly
A rocket’s payload capacity is not one universal number. The result depends on the target orbit, its altitude and inclination, the launch trajectory and site constraints, the vehicle configuration, and the mission’s injection requirements. A figure for one orbit cannot be compared directly with a figure for another.
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That distinction matters especially here. ULA’s live Vulcan performance table gives values for defined reference orbits and booster configurations. SpaceX’s Falcon Payload User’s Guide, dated May 9, 2025, does not publish an equivalent Falcon 9 mass-to-orbit table; it directs customers to request those capabilities. The public information therefore supports a detailed account of Vulcan’s listed figures, but not a defensible numerical Falcon 9-versus-Vulcan ranking for a matched mission.
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Orbit labels need to be read as part of the performance claim, not as incidental fine print. ULA defines its LEO-Reference case as a 200 km circular orbit at 28.7 degrees inclination. Its LEO-ISS reference is a 407 km circular orbit at 51.6 degrees, while its polar reference is a 200 km circular orbit at 90 degrees. These are different destinations with different conditions. The fact that each is called low Earth orbit does not make their payload capacities interchangeable.
Higher-energy destinations are another reason not to rely on a single headline number. ULA separately lists performance for medium Earth orbit (MEO), geostationary transfer orbit (GTO), geostationary orbit (GEO) and trans-lunar injection (TLI). A payload delivered to a circular LEO reference orbit is not being asked to reach the same destination as a payload sent toward GEO or onto a trans-lunar trajectory. ULA’s table presents those as separate mission conditions.
For a real launch decision, compare the payload mass and volume against the required orbit and inclination, then account for launch-site and trajectory constraints, whether the booster will be recovered, and whether the mission needs direct injection into a high-energy orbit. Also check whether the customer needs a specific service such as crew transport, cargo return or rideshare. The vehicle with the larger headline number is not necessarily the one that can deliver a particular payload to its required destination.
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Vulcan’s published LEO capacity varies by SRB configuration
Vulcan can fly with zero, two, four or six solid rocket boosters. ULA’s current performance table, accessed in 2026, lists the following payload capacities for its LEO-Reference orbit:
| Vulcan configuration | ULA-listed capacity to LEO-Reference |
|---|---|
| Zero SRBs | 10,800 kg |
| Two SRBs | 19,000 kg |
| Four SRBs | 24,600 kg |
| Six SRBs | 27,200 kg |
These figures apply to a 200 km circular orbit at 28.7 degrees inclination, which ULA defines as LEO-Reference. They are not universal payload ratings: changing the target orbit changes the performance requirement. ULA’s table also gives distinct reference conditions for other destinations, including a 407 km circular ISS orbit at 51.6 degrees and a 200 km circular polar orbit at 90 degrees. It separately lists performance for MEO, GTO, GEO and trans-lunar injection.
The SRB count is the configuration variable shown in this LEO table. The four listed values climb from 10,800 kg with zero SRBs to 27,200 kg with six, but the table is not a promise that every payload can fly in every configuration or to every destination. The stated orbit is part of each capacity figure, and other orbit entries in the ULA table have their own conditions. For comparison purposes, it is more useful to identify a mission’s target orbit and then locate the corresponding Vulcan entry than to carry a single figure around as “Vulcan’s capacity.”
ULA’s table also illustrates why “Vulcan” does not describe just one fixed performance setup. Zero-, two-, four- and six-SRB configurations are distinct options, and the table reports different LEO-Reference capacities for them. If a comparison names a Vulcan capacity but omits the booster configuration, it has left out a necessary part of the specification. If it names the configuration but omits the orbit, it is still incomplete.
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Use the value corresponding to the actual mission rather than treating the LEO-Reference figures as interchangeable with capacity to ISS orbit, polar orbit or a higher-energy destination. The table’s orbit definitions and configuration assumptions are part of every number.
Why the public figures do not establish a capacity winner
SpaceX’s May 2025 user guide states that mass-to-orbit capabilities for Falcon 9 and Falcon Heavy are available upon request. It does not provide the public Falcon 9 table needed to match a capacity figure to ULA’s stated orbit and configuration assumptions. Consequently, claims that Falcon 9 carries a particular amount more or less than Vulcan cannot be verified from these public sources as an apples-to-apples comparison.
This is a difference in what the reviewed public materials disclose, not evidence that Falcon 9 has no payload capacity or that Vulcan automatically carries more. ULA publishes performance numbers tied to its orbit definitions and SRB configurations. The SpaceX guide instead directs prospective customers to request Falcon mass-to-orbit capabilities. Without a Falcon 9 value for a specified orbit and recovery profile, there is no matched pair of figures to calculate a numerical winner.
A customer evaluating a specific mission should request Falcon 9 performance for the relevant orbit and recovery profile, then compare it with the appropriate Vulcan configuration and orbit entry. Mission design can trade performance against orbit, injection, trajectory and booster recovery requirements. Without matched conditions, a single “which carries more?” answer overstates what the published figures establish.
When reading a comparison elsewhere, check whether both numbers refer to the same kind of orbit, inclination and mission profile. Check whether the Falcon 9 figure specifies a recovery profile and whether the Vulcan figure specifies its SRB count. Also distinguish a launch to a transfer orbit from direct insertion into a final destination; the reviewed ULA material, for example, documents a direct-to-GEO mission, while the performance table lists GTO and GEO separately. If those details are absent, the figures may not answer the reader’s actual question.
Falcon 9 is designed to recover its first stage
SpaceX describes the Falcon 9 first stage as designed to survive atmospheric entry and be recovered. Its user guide says Block 5 changes included thermal-protection modifications intended to support rapid recovery and refurbishment. Recovery also allows returned hardware to be examined.
This is first-stage reusability, not full-vehicle reusability: the guide does not describe the Falcon 9 upper stage as reusable. The distinction matters because “reusable rocket” can suggest that every stage returns and flies again. The evidence in the guide is narrower: the first stage is designed for recovery and refurbishment, while the upper stage is not described as reusable there.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsRecovery is also a mission consideration rather than an abstract label. The guide’s discussion of thermal-protection modifications and refurbishment connects the design to the work required after return. Returned hardware can be inspected, which gives the operator an opportunity to examine it. But the existence of a recovery design does not mean every launch uses an identical recovery profile or that the same payload performance applies regardless of recovery requirements.
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Nor should the reuse comparison be stretched into an unsupported price claim. Falcon 9’s guide describes a recovery and refurbishment design, but supplies no comparable launch prices, customer costs or per-flight savings for either vehicle. Reusability is a factual design distinction in the reviewed documents; it is not, on this evidence, a quantified cost advantage.
This is first-stage reusability, not full-vehicle reusability: the guide does not describe the Falcon 9 upper stage as reusable. Nor does the existence of a reusable first stage mean every mission flies the same recovery profile; recovery needs to be considered alongside the target orbit and mission requirements when comparing performance.
What the reviewed Vulcan sources establish about reuse
ULA describes Vulcan as a booster powered by BE-4 engines, with optional SRBs and a Centaur V upper stage. Its published specification and the reviewed certification and mission pages document the vehicle, configurations and operations, but do not describe an operational Vulcan stage-recovery and reuse system.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe evidence therefore supports saying that Falcon 9 has a first stage designed for recovery, while the reviewed Vulcan sources do not establish operational stage reuse. That is a statement about what these materials document, not a claim about every future proposal or development concept.
That distinction is important for careful comparisons. The absence of an operational reuse system in the cited Vulcan specification and mission material should not be rewritten as a claim that ULA has never discussed recovery concepts or could never develop one. The supported conclusion is limited to the reviewed evidence: it documents Vulcan’s booster, optional SRBs, Centaur V and mission operations, but it does not establish a stage-recovery and reuse system in operational use.
Likewise, the Falcon 9 comparison should remain limited to the documented first-stage design. Calling Falcon 9 reusable is reasonable when the phrase is qualified as first-stage recovery and reuse; it is misleading if it implies the entire rocket, including its upper stage, is recovered and reflown.
Mission types and destinations
Falcon 9: satellite, rideshare, crew and cargo
SpaceX lists Falcon 9 services for LEO, polar and sun-synchronous LEO, GTO and Earth-escape missions. Available orbit options depend on launch site and mission constraints. Its guide also describes deployment of multiple satellites and dedicated small-satellite rideshare.
Those service categories answer different customer needs. A satellite operator may need a dedicated launch or an option to deploy multiple satellites. A small-satellite customer may consider dedicated rideshare. An Earth-escape mission has a destination beyond the Earth-orbit cases named in the guide. In every case, the stated service range is subject to orbit options, launch site and mission constraints; the list should not be treated as an assurance that every payload or trajectory is available under identical conditions.
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Falcon 9 also has a human-spaceflight and cargo role. NASA identifies it as the launch vehicle used for Commercial Crew missions to the International Space Station and describes its earlier satellite, cargo-delivery and cargo-return roles. Those services make Falcon 9’s mission range broader than a comparison limited to satellite mass-to-orbit.
The crew and cargo distinction is particularly useful when choosing how to frame the comparison. A customer requiring crew transport or cargo delivery and return is not comparing only launch capacity to an orbit. NASA’s program information places Falcon 9 within those Commercial Crew and commercial cargo roles. That is a different service consideration from whether a satellite can be placed into a specified orbit.
Vulcan: multiple reference orbits and national-security missions
ULA offers Vulcan with zero, two, four or six SRBs, and its published performance table covers LEO-Reference, ISS orbit, polar LEO, MEO, GTO, GEO and trans-lunar injection. ULA presents Centaur V as providing flexibility and endurance for complex orbital insertions.
That published range spans more than low Earth orbit. MEO, GTO, GEO and trans-lunar injection are separate mission destinations or trajectories in ULA’s table. The presence of a destination in a performance table indicates the vehicle’s published performance envelope for that mission category; it does not make the payload numbers for different orbits directly comparable. The exact orbit and configuration still matter.
On March 26, 2025, ULA announced that the U.S. Space Force had certified Vulcan for National Security Space Launch missions. That certification is a dated fact, not evidence that payloads or mission requirements are interchangeable between providers. A later example is USSF-87: on February 12, 2026, a four-SRB VC4S Vulcan carried a multi-manifest national-security payload directly to geosynchronous orbit.
The USSF-87 example adds an operational illustration to the orbit list: a four-SRB Vulcan configuration flew a national-security mission directly to GEO. It should not be mistaken for a universal capacity figure, or for a claim that every payload can be delivered directly to GEO. It demonstrates a specific mission and configuration, while the mission’s payload performance remains distinct from the LEO-Reference capacities in ULA’s table.
ULA’s certification announcement also includes a company statement about Centaur V. ULA president and CEO Tory Bruno said: “Vulcan’s Centaur upper stage is a high-velocity and maneuverable platform to address evolving on-orbit threats in this new space warfighting domain and will offer extreme on-orbit endurance and flexibility for complex orbital insertions to meet the changing landscape and requirements of our nation.” That is ULA’s executive describing the company’s vehicle and its intended role; it is not an independent performance assessment.
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Which rocket fits a mission?
Start with the mission’s destination and service requirements, not a rocket’s headline capacity. Use this checklist to frame a comparison:
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- Specify the orbit. Record altitude, inclination and whether the destination is LEO, polar LEO, GTO, GEO, MEO or an Earth-escape or trans-lunar trajectory. “LEO” alone may be too vague for a comparison because ULA’s own reference cases distinguish altitude and inclination.
- Match the published assumptions. For Vulcan, select the relevant SRB configuration and ULA reference-orbit entry. For Falcon 9, request mission-specific mass-to-orbit capability from SpaceX; its May 2025 guide does not publish a matching table.
- Account for recovery. Falcon 9’s first-stage recovery design is relevant to mission planning; do not treat recovery performance as equivalent to expendable performance. The cited guide does not provide a matched capacity value that would quantify a recovery-related difference against Vulcan.
- Check payload fit. Consider both mass and volume, along with payload deployment needs and the required insertion accuracy. A rocket’s mass figure alone does not tell whether the payload’s size or deployment requirements fit a particular mission.
- Confirm service type. Crew transport, cargo delivery or return, multi-satellite deployment and rideshare may determine suitability independently of a capacity comparison.
- Verify mission eligibility and constraints. Certification, launch-site availability and customer-specific requirements are not automatically transferable from one rocket or provider to another.
A practical first pass can be made in sequence. First, write down the exact destination and required orbit rather than beginning with a vehicle. Second, identify the applicable Vulcan SRB configuration and reference entry if considering Vulcan. Third, ask SpaceX for Falcon 9 mass-to-orbit capability for the same orbit and recovery profile. Fourth, compare the missions on payload mass and volume, deployment or insertion requirements, trajectory and launch-site constraints. Finally, determine whether the required service includes crew, cargo delivery or return, multiple payloads, or rideshare. This process avoids treating unrelated published numbers as a head-to-head result.
It also clarifies which questions cannot be answered from the cited public sources. A user can read Vulcan’s listed LEO-Reference figures and identify its orbit coverage, but cannot infer a matched Falcon 9 capacity from the SpaceX guide. A user can establish that Falcon 9 has a first-stage recovery design, but should not infer that the second stage is reusable or assign a specific cost saving. And a user can point to Vulcan’s USSF-87 direct-to-GEO mission, but should not assume that a different mission has the same requirements or performance.
Bottom line on the comparison
The public evidence does not support declaring Falcon 9 or Vulcan the payload-capacity winner without specifying a mission and obtaining matched performance conditions. Vulcan has published LEO-Reference capacity values that rise with SRB count; SpaceX directs customers to request Falcon 9 mass-to-orbit data. Falcon 9’s documented distinction is first-stage recovery design, while Vulcan’s published material establishes a broad orbit and mission envelope, including direct-GEO national-security service.
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Sources
- SpaceX, Falcon Payload User’s Guide, May 9, 2025
- United Launch Alliance, Vulcan performance and vehicle information (current page accessed in 2026)
- United Launch Alliance, Vulcan NSSL certification announcement, March 26, 2025
- United Launch Alliance, USSF-87 mission page
- NASA, Commercial Crew and commercial cargo program information
Frequently Asked Questions
Which rocket carries more payload, Falcon 9 or Vulcan?
The reviewed public sources do not support a like-for-like winner. ULA publishes Vulcan capacities by SRB configuration and orbit, including 10,800 to 27,200 kg for its specified LEO-Reference conditions. SpaceX’s May 2025 guide says Falcon mass-to-orbit capabilities are available upon request rather than publishing a matched Falcon 9 table. Compare the same orbit, inclination and recovery profile before drawing a conclusion.
How much can Vulcan carry to low Earth orbit?
ULA lists 10,800 kg with zero SRBs, 19,000 kg with two, 24,600 kg with four and 27,200 kg with six for its LEO-Reference orbit: a 200 km circular orbit at 28.7 degrees inclination. These are not universal capacities for every LEO mission; ULA lists separate conditions for ISS and polar orbits as well as higher-energy destinations.
Is Falcon 9 reusable?
SpaceX describes Falcon 9’s first stage as designed to survive atmospheric entry and be recovered. Its guide says Block 5 changes included thermal-protection modifications to support rapid recovery and refurbishment. The guide does not describe the upper stage as reusable, so the supported description is first-stage recovery and reuse, not full-vehicle reuse.
Is Vulcan reusable?
The reviewed ULA specification, certification and mission materials describe Vulcan’s booster, optional SRBs, Centaur V and missions, but do not establish an operational stage-recovery and reuse system. That is a limit of what these sources document, not a claim about every future proposal.
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SpaceX lists Falcon 9 services for LEO, polar and sun-synchronous LEO, GTO and Earth-escape missions, along with multi-satellite deployment and dedicated small-satellite rideshare. NASA also identifies Falcon 9 with Commercial Crew and cargo missions, including delivery and return roles. ULA’s Vulcan performance table covers LEO, ISS orbit, polar LEO, MEO, GTO, GEO and trans-lunar injection; Vulcan is certified for NSSL missions, and a four-SRB VC4S flew USSF-87 directly to GEO in February 2026.
The Bottom Line
There is no public, matched payload-capacity comparison that establishes a Falcon 9 or Vulcan winner. Vulcan’s listed capacity depends on SRB count and destination orbit, while SpaceX directs customers to request Falcon 9 mass-to-orbit data. Falcon 9 is designed to recover its first stage; the reviewed Vulcan sources do not establish operational stage reuse. Choose by mission-specific orbit, configuration, recovery, payload fit and service requirements—not by an unmatched headline figure.
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