"A knight in full armor weighed so much that he needed a crane to get on his horse." Almost everyone has heard this, and almost every museum curator has tried to retire it. Real harnesses of the 15th and 16th centuries were heavy by modern standards, but they were also carefully fitted, spread over the whole body, and built so that their owners could run, mount, fight on foot and get up from the ground. The truth sits between two extremes: armor was not a toy, and it was not a prison.
For LARP players, reenactors and ren faire visitors this matters in a very practical way. If you know what original armor weighed and how it was carried, you can judge what is realistic for your character, understand why a long day in steel is tiring, and see why lighter modern materials are such a good fit for events. In this guide we look at the numbers from museum collections, sort the myths from the facts, explain how weight was distributed, summarize what scientists measured when volunteers walked and ran in replica harnesses, and compare all of it with polyurethane armor for LARP.
Real Armor Weights at a Glance
The table below collects weights recorded by museums for individual objects. Treat it as a set of examples, not as a rule: every harness was made for one person and one purpose. Several of the museum pieces are also "composed" armors, meaning they were assembled in modern times from genuine parts of different origins, and some contain restored elements. We mark these clearly.
| Object | Date and place | Weight | Notes |
|---|---|---|---|
| Mail shirt (Royal Armouries estimate) | Medieval Europe | About 13 kg / about 29 lbs | A general figure given for a mail shirt |
| Parts of a field armor, Kolman Helmschmid (Wallace Collection) | c. 1525 to c. 1530, Augsburg | 16.3 kg / 35.9 lbs | Listed as parts of a field armor, not a complete harness |
| Composed Italian armor, Chalcis pieces (Met) | c. 1400 to 1450 and later, Italy | 18.6 kg / 41 lbs | Assembled and restored in the 1920s |
| Gothic armor, German and Italian (Met) | Late 15th century, restored c. 1926 | 20.53 kg / 45 lbs 4 oz, without helmet | About half is restoration |
| Composed armor for man (Met) | c. 1450 to 1525 and later, Europe | 26.88 kg / 59 lbs 4 oz, helmet 1.697 kg | Composed from parts of several origins |
| Armor for heavy cavalry (Met) | c. 1600, France | 34.98 kg / 77 lbs 2 oz | Late, for the cavalry of the day |
| Cuirassier armor (Met) | c. 1610 to 1630, Milan or Brescia | 39.24 kg / 86 lbs 8 oz | Heavier armor of the early 17th century |
| Henry VIII's foot combat armor (Royal Armouries) | 1520, for the Field of Cloth of Gold | 42.6 kg / about 94 lbs | Specialized tournament armor, described as twice the weight of a normal battle armor |
Two general figures frame these examples. The Metropolitan Museum of Art states that field armor usually weighs between 45 and 55 lbs (20 to 25 kg) and that a helmet weighs between 4 and 8 lbs (2 to 4 kg). The Royal Armouries gives about 60 to 70 lbs (roughly 27 to 32 kg) for a full plate harness. Both ranges fit the museum objects above, because the objects differ in date, in how complete they are, and in whether a helmet is counted.
Why the Numbers Vary So Much
When you read "armor weighed 20 kg" in one place and "40 kg" in another, both can be right. Several things change the figure.
- What is included. Some museum records list the armor without the helmet (the Met's Gothic armor, 20.53 kg, is recorded that way), others include it. Gauntlets, a mail collar, a lance rest or a horse's armor can add or remove several kilograms.
- Date. The cuirassier armors of about 1600 to 1630 in the table are in the 35 to 39 kg range, well above the roughly 20 to 25 kg the Met gives for typical field armor.
- Purpose. Armor for the battlefield had to be practical. Armor for specialized tournaments could be much heavier. The Royal Armouries describes Henry VIII's 1520 foot combat armor at 42.6 kg as twice the weight of a normal battle armor, and says that only a fit, strong man could have worn it.
- The person. Armor was made to measure. A tall, broad man needed more steel than a slim one.
- Modern assembly. Museums display many "composed" armors, built from original parts of different dates. They are valuable for study, but their weights show an assembled set, not one soldier's actual kit.
For an honest comparison, it is best to think in ranges rather than a single number: roughly 16 to 27 kg in the museum examples dated before 1600, with the cavalry harnesses of about 1600 to 1630 and the specialized tournament armor reaching 35 kg and more.
Myths and Facts
Myth: Knights Needed a Crane to Mount a Horse
The Met says this is without foundation. Its curators point to illustrations of men in full armor mounting horses without ladders or cranes, and note that men-at-arms could simply put a foot in the stirrup and climb on. Its essay on the function of armor goes further and calls the crane-lifted knight a Hollywood invention. Modern experiments cited by the museum found that an untrained man in a properly fitted armor can mount and dismount a horse, sit or lie on the ground and get up again.
Myth: A Fallen Knight Was Helpless
The same Met text calls the idea that a fallen armored man could not rise without foundation. It also quotes a medieval example: the French commander Boucicaut was said to climb up the underside of a ladder using only his hands. The Royal Armouries mentions the same Jean Boucicaut, writing in the early 1400s, who described men in full plate able to vault onto a warhorse, run for long periods and even somersault. Treat these as medieval reports of unusually fit professionals, not as proof that everyone could do them, but they show the contemporary expectation that armor and agility went together.
Myth: Plate Armor Was Stiff and Clumsy
According to the Met, plate armor was built so that it allowed practically all of the body's movements without any impairment from the rigidity of the material. The Royal Armouries explains why: the weight was spread over the whole body, so a plate-armored soldier was still remarkably agile, and armor had to be fairly light to be effective in battle. Even the very heavy Henry VIII foot combat armor described below had internal turning joints and linked lames at the armpits, elbows and knees, so the steel could move with the limbs.
Myth: Armor Was Impossible to Wear for Long
This one has a kernel of truth. Wearing armor in battle was physically demanding, and the Royal Armouries notes that heat exhaustion from over-exertion was a real problem. Armor also needed regular cleaning and repair. So the better statement is: armor was wearable and mobile, but tiring, hot and demanding on fitness. We return to the measurements below.
Myth: All Armor Was Extremely Heavy
The Met's essay on armor in medieval and Renaissance Europe states that most plate armor is not as heavy as commonly believed. Armor made for war had to avoid excess weight and inflexible material. Among the museum examples in this guide, the heaviest are a specialized tournament armor and the cavalry harnesses of about 1600 to 1630.
Weight Distribution: Why a Harness Is Not a Backpack
The key to understanding armor weight is that it was carried differently from a rucksack. A well-fitted harness hangs from the shoulders, rests on the hips and surrounds the limbs, so there is no single point that bears all the load. The Met describes the weight of a well-fitted armor as distributed all over the body.
That is a real advantage: a soldier carrying 20 kg in a well-fitted harness is far better off than one carrying the same 20 kg in a sack on his back. But it comes with a trade-off that scientists have measured. Because the weight sits on the arms and legs, every step and every swing has to move that mass, and this costs energy. The next section explains what they found.
Here is a simple way to picture where the weight sits on a full plate harness. This is a general guide to help you plan your own kit, and it gives no per-piece museum figures except where stated:
- Head: the helmet. The Met gives 2 to 4 kg for helmets in its general figures. The Met's composed armor for man includes a helmet of 1.697 kg, so lighter open helmets existed.
- Torso: breastplate and backplate, which sit on the shoulders and the waist.
- Shoulders and arms: pauldrons, couters and vambraces. These are the parts that move most in a fight.
- Hips and legs: tassets, cuisses, poleyns and greaves. Leg armor is where extra weight is felt on every stride.
- Underlayers: a padded arming doublet. The Met notes that fitted, padded arming doublets with arming points supported the plate and cushioned blows.
If you want to know the names of each part and what it did, see our guide to the evolution of knight armor.
What Scientists Measured
In 2011 a team led by Dr Graham Askew of the University of Leeds, with Dr Federico Formenti of the University of Auckland, published an experimental study of what it costs to move in medieval armor. According to the Royal Society and the University of Leeds, the volunteers were highly skilled fight interpreters of the Royal Armouries, who wore exact replicas of four types of European armor and did walking and running exercises while the researchers measured their oxygen use and breathing. The Royal Society reports that the work appeared in Proceedings of the Royal Society B on 20 July 2011 and presents it as the first clear experimental evidence that medieval armor may have limited a soldier's performance.
The main findings, in plain words:
- Heavy armor roughly doubled the energy cost. The Royal Society reports that soldiers in heavy armor used more than twice the energy of those without heavy protection.
- The reason is the distribution. Lead researcher Askew explained that in a suit of armor the limbs are loaded with weight, which makes each stride harder to swing. The University of Leeds reports that this takes much more energy than carrying the same weight in a backpack.
- Breathing changed. The participants took more frequent, shallower breaths instead of deep ones. Formenti said that you feel breathless as soon as you begin to move around in medieval armor.
- It is a limit, not a ban. The researchers suggested that this could help historians understand outcomes of battles such as Agincourt. The study does not say that armor made movement impossible. The volunteers walked and ran in it.
The University of Leeds describes 15th-century steel plate armor as typically weighing 30 to 50 kg, which is higher than the Met's figure for typical field armor. The difference is a good reminder that sources count different things and different periods. When you plan a LARP kit, the useful lesson is the same in both cases: weight on the limbs costs more energy than weight on the back, and long days in a heavy harness mean heat, shorter breaths and earlier fatigue.
For LARP, this explains something every player notices: a few kilograms of leg and arm armor feels like more than a bag of the same weight. Light, well-fitted pieces help you play longer.
Weights by Piece
Museum records sometimes list individual pieces, and the totals in the table are made of those parts. A few reference points from the sources above:
- Helmets: 2 to 4 kg (4 to 8 lbs) is the Met's general range for helmets of field armor. The Met's composed armor for man lists a helmet of 1.697 kg (3 lbs 12 oz). A specialized joust helm, the German Stechhelm of about 1500 in the Met, weighs 8.097 kg (17 lbs 14 oz), which shows how heavy tournament-only pieces could be.
- Mail: the Royal Armouries gives about 13 kg for a mail shirt (the museum text states 30 lbs, but 13 kg is about 29 lbs). The Royal Armouries adds that between about 1325 and 1340 plate began to replace or supplement mail. For more on that period, read our article on the evolution from mail to plate.
- Torso, arm and leg plates together: the Met records the Gothic armor at 20.53 kg without a helmet.
We have left out individual figures we could not verify from museum records. If a website gives a very exact weight for "a typical breastplate" without naming an object in a collection, it is an estimate.
Field Armor, Tournament Armor and Late Harnesses
A single word, "armor," hides at least three different kinds of equipment, and they weigh different amounts.
Field Armor
This is armor made for war. The Met's general range of 20 to 25 kg applies here. The Wallace Collection's field armor parts by Kolman Helmschmid of Augsburg, made around 1525 to 1530 and recorded at 16.3 kg, are a fine example. The museum calls the armor an outstanding one that represents the peak of German Renaissance armor-making, decorated with etching and gilding but built for war.
Tournament Armor
The Met explains that tournament armor was made for very specific occasions, and that early tournaments used the same gear as war but that specialized armor developed over time, with extra plates for the throat and hands appearing around 1300. Specialized pieces could be heavy, such as the Stechhelm at 8.097 kg, or Henry VIII's foot combat armor at 42.6 kg. The Royal Armouries notes that it was built with internal turning joints and linked lames at the armpits, elbows and knees, so even this armor was articulated.
Late and Cavalry Harnesses
By the early 17th century, armor for heavy cavalry reached the 35 to 39 kg of the Met's French armor of about 1600 and the Milanese or Brescian cuirassier armor of 1610 to 1630.
Armor Weight at a Glance: Type Comparison
Putting all this together gives a simple picture of the figures in the sources.
| Type | Figure in the sources | Source |
|---|---|---|
| Mail shirt | About 13 kg / about 29 lbs | Royal Armouries |
| Field armor | 20 to 25 kg / 45 to 55 lbs | Met |
| Full plate harness | About 27 to 32 kg / 60 to 70 lbs | Royal Armouries |
| Heavy cavalry armor, c. 1600 to 1630 | 34.98 to 39.24 kg / 77 to 86.5 lbs | Met objects |
| Henry VIII's foot combat armor, 1520 | 42.6 kg / about 94 lbs | Royal Armouries |
How Much Does LARP Armor Weigh?
The question most players ask after reading these numbers is: how does my kit compare? Historical steel was heavy, and a modern steel reproduction of a full harness is similar. For LARP, the honest comparison looks like this:
- Weight on the limbs. Because the Leeds research shows that weight on arms and legs costs more energy than weight on the back, lightweight pauldrons, bracers and greaves are the parts of a kit where light materials make the biggest difference to how you feel after several hours.
- Heat. Steel gets hot in the sun, and heat exhaustion was a real problem even for medieval soldiers. Choosing a lighter material and adjusting your padded layers to the weather helps you stay comfortable.
- Safety. Steel armor is not allowed in combat at many LARP events. Armor made of polyurethane resin has no sharp edges and works with LARP-safe weapons. Rules differ from game to game, so always check the armor rules of your event.
- Fit still matters. The lesson of real armor is not "heavier is more authentic" but "fit and distribution matter more than total weight." A light armor that hangs badly is more tiring than a heavier one that sits on the shoulders and hips properly.
Steel or Polyurethane: Which Is Better for LARP?
Our armor is made in our workshop in Ukraine from polyurethane resin reinforced with fiberglass and painted by hand. It is designed to look like forged metal without the weight, the rust or the heat. Our helmets weigh about 1 to 1.5 kg / 2.2 to 3.3 lbs, which is lighter than the 2 to 4 kg the Met gives for helmets of historical field armor and a fraction of the 8.097 kg of the German joust helm.
A fair comparison for a player deciding between materials:
- Steel: authentic feel and sound, long life with maintenance, but heavier, hotter, prone to rust and often banned in LARP combat.
- Polyurethane with fiberglass: lighter than steel, no rust, no sharp edges, can be painted in any color and finish, suitable for LARP battles. It is not meant for real combat, and it does not replace the experience of historical steel for reenactors who want that.
For a deeper comparison of materials, read What Is the Best Type of LARP Armor? and Common Myths About Polyurethane Armor. If you want to see how our pieces are made, our page on how polyurethane LARP armor is made explains each step, and armor maintenance shows how to keep it in good condition.
Practical Tips for Wearing Armor Over a Long Day
Whatever material you choose, the same lessons from the historical record apply.
- Layer properly. Real armor was worn over a padded arming doublet. In LARP, a gambeson or padded shirt spreads pressure and protects your shoulders and hips. See our LARP gambesons.
- Put the weight on your hips and shoulders. Straps should hold the armor against your body without pulling on the neck. Check that nothing digs in under the arm.
- Drink and rest. Medieval soldiers suffered heat exhaustion, and so do players. Take breaks in the shade, drink water and take off the helmet when the scene allows.
- Test your range of motion. Before the event, sit, kneel, lie down, get up, climb stairs and raise your arms with the armor on. This is exactly what the Met's experiments tested, and a well-fitted set should pass.
- Build up gradually. If you start with a helmet and bracers and add pieces over time, you can find which parts tire you most.
Which Armor Weight Fits Your Character?
- Light infantry, scout or archer: a helmet, a gambeson and a few key pieces. Lighter kit matches the role and keeps you mobile. See our LARP helmets and gambesons.
- Soldier or mercenary: a breastplate, shoulder pieces and a helmet. See the Landsknecht collection.
- Knight or man-at-arms: a full set of torso, arm, hip and leg armor, the closest to the historical 20 to 25 kg harness in look. See the Knight collection and our armor sets.
- Paladin, champion or tournament fighter: heavy-looking, fully enclosed kit. See the Paladin collection.
You can also build a kit piece by piece: breastplates, pauldrons, bracers, tassets and greaves. For a look at how fighting works at events, read How Does LARP Combat Work?
Our Armor in Practice
All our armor is made from original designs by our team, painted by hand, and can be recolored free of charge in your colors. Customers have worn our armor at large LARP events such as ConQuest of Mythodea and DrachenFest. We make armor and accessories only: we do not sell weapons. Production takes 7 to 21 business days, we ship worldwide, and instalment payments are available. You can browse everything in our LARP armor collection.
Want Armor Made to Your Measurements?
If you want a piece in a particular historical style, a heraldic design or your group's colors, we make custom pieces to order. We start with a 2D concept, then a 3D sculpt, and then the mold and the final piece. Tell us your idea on our Custom LARP Armor page. If you equip a group, orders from 5 players get 15% off: see Group Orders.
Further Reading
- The Metropolitan Museum of Art: Arms and Armor, Common Misconceptions and Frequently Asked Questions
- The Metropolitan Museum of Art: The Function of Armor in Medieval and Renaissance Europe
- Royal Armouries: The Hundred Years' War, 1337 to 1453
- Royal Armouries: Henry VIII's Foot Combat Armour
- The Royal Society: Battle Weary, the Askew and Formenti Armor Study
- University of Leeds: Heavy Metal Hardens Battle
- Wallace Collection: Parts of a Field Armour
Want to see how armor developed as a whole? Read The Evolution of Knight Armor: From Mail to Plate.
Frequently Asked Questions
How Much Did a Full Suit of Medieval Armor Weigh?
Could a Knight Really Not Get on a Horse Without a Crane?
Why Did Armor Feel Heavier Than a Backpack of the Same Weight?
How Heavy Was a Medieval Helmet?
How Does LARP Armor Compare With Historical Armor in Weight?
Event information is provided for orientation only. LARPSHOPKEEPER is not affiliated with the organizers. Please check dates and details on the official event websites.
