When you look at a humanoid robot datasheet, you encounter a standard set of technical specifications: payload, degrees of freedom, walking speed, battery life, operating temperature and others. These figures are not all equally important, and the same figure can mean very different things depending on your intended deployment. This guide explains what each specification measures, what a useful value looks like, and how to prioritise them for a UK procurement context.
A note on how manufacturers publish specifications: there is no standardised testing methodology for humanoid robots comparable to, say, ISO standards for industrial arms. Two manufacturers publishing "payload: 10 kg" may have measured this under different conditions. Where comparisons are critical, always request the test conditions from the manufacturer alongside the figure itself.
Physical specifications
Height, weight and footprint
Height and weight affect where and how a robot can operate. A robot designed to work in a human environment needs to fit through standard doorways, navigate standard-height shelving, and not exceed the floor load limits of standard commercial premises. Most commercially relevant humanoid platforms are designed to be approximately human-height, typically in the range of 150 to 180 centimetres. This is deliberate: the entire built environment, from door handles to pallet heights to staircase dimensions, is designed for humans of roughly this size. A robot that fits this envelope can, in principle, operate in a space designed for human workers without physical modification.
Weight matters for floor loading, for safety in the event of a fall, and for transport logistics. A heavier robot concentrates more force on a smaller footprint and is more damaging in a collision. It also requires more energy to move. Most commercial platforms are designed to be as light as their structural requirements allow, but weights currently range from roughly 50 to 90 kilograms for full bipedal humanoid platforms. Confirm that your floor can carry the robot's weight, particularly in older industrial premises.
Footprint matters in congested environments. A robot that walks with a narrow stance is better suited to tight aisles than one requiring a wide stance for stability. Walking speed, turning radius and the space required to stop safely are all part of the operational footprint that manufacturers should be able to provide.
Payload
Payload is the maximum weight the robot can lift or carry, typically stated for arm reach at a specified position. This is one of the most operationally significant specifications for any material handling application. A warehouse tote, a box of components on a production line, or a domestic object all have different weights and different handling requirements.
Published payload figures vary considerably across platforms and should be read carefully. A payload of 10 kg at a fully extended arm is different from 10 kg close to the body. Payload per arm and total payload are different things. Payload at walking speed is different from payload when stationary. Ask the manufacturer: what is the payload under the specific conditions of your intended task?
For context: a standard fulfilment centre tote commonly weighs up to around 15 kg when full. An adult care context might involve assisting a person weighing significantly more than any current humanoid can support. Matching the payload specification to the actual task weight, with a sensible margin, is essential.
Degrees of freedom
Degrees of freedom (DOF) refers to the number of independent axes of movement in the robot's body. A human body has a very large number of degrees of freedom; commercial humanoid robots have fewer, though the number has grown as designs have matured. More degrees of freedom generally mean greater dexterity and versatility, but also more mechanical complexity, more potential failure points, and higher cost.
The relevant question is not the absolute number of degrees of freedom but whether the robot has sufficient DOF for the specific tasks it will perform. A robot intended for straightforward pick-and-place in a controlled environment needs far fewer DOF than one expected to perform varied, unscripted tasks in a dynamic environment. When comparing platforms, ask: what tasks has this platform demonstrated with reliable repeatability, and are those tasks similar to mine?
Hand DOF is a sub-specification worth examining separately. Some platforms have relatively simple grippers; others have multi-fingered hands capable of tool use and fine manipulation. The hands are often the limiting factor for dexterous task performance, and more DOF in the hand adds disproportionate cost and fragility.
Battery life and charging
Battery life in humanoid robots is typically stated as operating duration under nominal load conditions. Actual operational uptime will be shorter in practice, particularly during physically demanding tasks such as continuous walking with load, or tasks requiring sustained arm force.
For a commercial deployment, the question is not just battery life but operational cycle: how long does the robot work, how long does it take to recharge, and does your workflow accommodate that cycle? A robot with a two-hour battery life that takes four hours to recharge fully is only available for a third of the working day on a single battery. Many manufacturers allow hot-swap battery packs for continuous operation, which changes the calculation significantly but adds to operational complexity and spare battery cost.
Battery degradation over time is another consideration. Lithium battery capacity typically declines with charge cycles. Understand the manufacturer's warranty terms for battery replacement and the cost of battery replacement over the expected operational lifetime of the system.
Locomotion and terrain capability
Locomotion specifications describe how the robot moves and what surfaces and environments it can handle. Walking speed on a flat surface is the most commonly cited figure, but most real-world deployments involve more than flat floors. Relevant questions include: can the robot handle slopes and ramps, negotiate kerbs or thresholds, and recover from a stumble or accidental contact with an obstacle? Can it operate on wet or slightly uneven flooring?
Many humanoid platforms are designed for controlled indoor environments and should not be assumed to handle outdoor conditions. Temperature and humidity ranges matter for UK deployments that may involve unheated warehouse environments in winter or humid food production settings. Check the manufacturer's stated operating environment parameters and compare them to your actual deployment conditions.
Stair climbing is frequently demonstrated in manufacturer videos but is a demanding capability that requires specific hardware and software. Do not assume that a robot can navigate stairs simply because a demonstration video exists. Ask for the specifications and the limitations: what stair dimensions, what handrail requirements, what maximum gradient?
Sensing and navigation
Humanoid robots use a combination of cameras, depth sensors (such as LiDAR or structured light), force-torque sensors in the limbs, and inertial measurement units to perceive their environment and maintain balance. The specific sensor suite affects how well the robot performs in different lighting conditions, how accurately it can locate and manipulate objects, and how safely it responds to unexpected obstacles or human co-workers.
For a UK deployment context, understanding the sensor suite matters for several practical reasons. Camera-based systems may perform poorly in low-light or high-glare environments common in industrial settings. Sensor ranges and blind spots affect safe co-working distances. Data generated by onboard sensors, particularly cameras, has data protection implications under UK GDPR if it captures images of workers or visitors: this is a compliance question that requires legal advice specific to your deployment.
Ask the manufacturer what the robot perceives and records, how long that data is retained, where it is stored, and what your obligations are as the operator. This is not a common question in manufacturer brochures but it is a legitimate UK legal due-diligence question.
Procurement context
Specifications are necessary but not sufficient
Technical specifications tell you what a robot is capable of under controlled conditions. They do not tell you how reliably it will perform those capabilities in your specific environment, over the operational duration you need, with the maintenance resources you have available. Specifications are the starting point for evaluation, not the end point.
For a UK buyer, the additional questions beyond specifications include: Is there UK-based technical support available, and what is the response time? What does the maintenance schedule look like and who performs it? What training is required for your team to work alongside the system safely? What is the estimated total cost of ownership over three to five years, including maintenance, consumables and battery replacement? What certification or safety assessment is required under UK Health and Safety legislation for deploying an autonomous system in your workplace?
These are questions for your supplier or the manufacturer's UK representative, and in some cases for a qualified UK health and safety consultant. The directory aims to provide structured data on known platforms and UK providers to help you ask the right questions of the right people.
For context on who is making the platforms you will encounter in your evaluation, see the companion guide: The main humanoid robot platforms: an honest overview for UK audiences.
A note on this guide
How this guide was written
This guide is written from a UK procurement perspective, drawing on publicly available technical documentation from multiple manufacturers, trade press reporting, and the research underlying the Humanoid Robot Directory. No manufacturer funding or editorial influence was involved. The guide focuses on the questions a UK buyer needs to ask rather than on promoting any specific platform. It was last reviewed on 20 September 2026.
Corrections, additions or deployment experience from UK organisations are welcome at hello@humanoidrobotdirectory.co.uk.
Related guides
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Common questions
Common questions about comparing humanoid robots
What specifications matter most when comparing humanoid robots for a UK deployment?
For most UK deployment contexts, the most decision-relevant specifications are payload capacity (how much the robot can carry), battery runtime (how long between charges), locomotion type (wheeled platforms are more stable; bipedal platforms are more versatile in human-built spaces), and the level of autonomy in navigation and task execution. Manufacturer-quoted specifications should be verified against deployment context; laboratory figures and real-world operating figures often differ.
Are humanoid robot specifications published by manufacturers reliable for procurement purposes?
Manufacturer-quoted specifications should be treated as indicative rather than guaranteed performance figures. Many are measured under controlled conditions. For any serious procurement decision, specifications should be verified through pilot testing or through reference data from actual deployments. Where possible, ask for reference customers with comparable use cases who can share operational data.
What does degrees of freedom mean for humanoid robot arm capability?
Degrees of freedom (DOF) refers to the number of independent movements a joint or limb can make. Higher DOF in an arm allows more complex manipulation tasks and a greater range of movement. A human arm has approximately 7 DOF. Humanoid robot arms typically range from 5 to 7 DOF. Higher DOF does not automatically mean better performance; the control software and sensor quality matter at least as much as the mechanical range of movement.