Sports & Outdoors Calculators
Gear sizing runs on different rules to clothing: a snowboard is sized by your weight, a bike by your inseam, and getting it wrong costs you control rather than comfort. These tools use the measurement that actually drives the fit, and say plainly where the old rules of thumb went wrong.
- Baseball Bat Size CalculatorBat length from height and weight, plus the drop and stamp your league requires.
- Baseball Glove Size CalculatorGlove size in inches from age and position, with the catcher's mitt trap explained.
- Bike Size CalculatorTurn your height and inseam into a road, mountain, or hybrid frame size.
- Boxing Glove Size CalculatorGlove ounces from your weight and purpose, plus hand size from your hand.
- Golf Club Size CalculatorClub length from wrist to floor, the measurement height charts leave out.
- Golf Glove Size CalculatorGolf glove size from hand circumference, with the cadet question settled.
- Golf Grip Size CalculatorGrip size from hand length, plus the tape route from a standard grip.
- Hockey Skate Size CalculatorShoe size to skate size, with the Youth, Junior and Senior tiers untangled.
- Skateboard Size CalculatorDeck width from your shoe size and style, plus the trucks and wheels that fit.
- Ski Size CalculatorSki length from your height, ability and terrain, with a weight cross-check.
- Snowboard Size CalculatorBoard length from your weight and riding style, plus the width your boots need.
Gear sizing runs on a different measurement for every sport
Clothing sizing has one basic question behind it: how big is the body. Gear does not. A snowboard is sized by what you weigh, a ski by how tall you are, a skateboard by your shoe, and a hockey skate by a number that is deliberately smaller than your shoe. Using the wrong input is not a rounding error, it hands you a different piece of equipment.
Getting it wrong also costs something different here. A shirt that is too big is uncomfortable. A snowboard that is too long is genuinely harder to turn, and a skate that is too roomy will give you blisters and no edge control.
What actually drives the size, sport by sport
| Gear | Sized by | Common mistake |
|---|---|---|
| Snowboard | Rider weight | Using height, which the chin rule encourages |
| Skis | Rider height | Assuming weight drives length, as it does for boards |
| Bike frame | Inseam | Using total height, which ignores leg to torso ratio |
| Skateboard deck | Shoe size, as deck width | Shopping by deck length, which is not the spec |
| Hockey skate | Shoe size minus about 1.5 | Buying your shoe size, which is far too loose |
| Boxing gloves | Purpose first, then weight | Reading the ounce as a hand size |
The ski and snowboard contradiction, explained
There is an old eyeball test that says a board or ski should reach somewhere between your chin and your forehead when stood on end. On this site we endorse that test for skis and reject it for snowboards, and the reason is not inconsistency.
Ski length tracks height, so a height based rule of thumb approximates the right answer. Board length tracks the load you put on it, so a height based rule ignores the variable that matters. A light rider who is tall gets a badly wrong answer from the chin rule: at 130 lb and 6 ft 2 the weight based length is around 147 cm, while the chin rule points at roughly 165. That is not a fine adjustment, it is a different board.
Both pages state the contrast and link to each other, because the fastest way to size either one correctly is to understand why they disagree.
Why the published charts do not agree
For most of this gear there is no standard, only convention. Retailers publish their own tables built from their own experience, and those tables genuinely differ.
Boxing gloves are the clearest case: one major retailer puts a 125 to 150 lb boxer on 12 oz for bag work while another puts a 101 to 150 lb boxer on 10 to 12 oz for the same thing. Neither is wrong. The ounce is a padding weight that grew out of gym practice, not a specification anyone published. Where charts disagree we take the middle of the published range and say so, rather than presenting one retailer's table as fact.
Two situations end the argument for you. The first is your gym, which may simply require 16 oz for all adult sparring. The second is competition, where a sanctioning body sets the number as a rule rather than a preference. In both cases their number beats any chart, including ours.
Where a shoe size becomes a gear size
Three tools here start from your feet, and they do different things with them.
A hockey skate runs about 1.5 sizes below your men's US shoe size, because a skate is meant to be snug in a way a shoe is not. The tiers matter as much as the number: Youth, Junior and Senior are separate scales that restart, so a Junior 5 and a Senior 5 are not the same skate.
A skateboard is sized by deck width in inches, not length, and width tracks shoe size so your feet sit properly on the board. Trucks are then matched to the deck's published width range. Axle width is a genuine trap: an Indy 129 has an 8.0 inch axle but is built for a 7.4 to 7.8 inch deck, so matching axle to deck width puts you on the wrong truck.
Snowboard boot size feeds the board's width rather than its length, which is how you avoid toe drag. Length still comes from your weight.
Frequently asked questions
Should a snowboard be sized by height or weight?
Weight. Board length tracks the load you put on the board, so the old chin to forehead height rule can be badly wrong. A rider at 130 lb and 6 ft 2 sizes to about 147 cm by weight, while the chin rule points at roughly 165 cm. That is a different board, not a fine adjustment.
Why are skis sized by height when snowboards are not?
Because ski length genuinely tracks height while board length tracks load. The same chin to forehead eyeball test is therefore a reasonable approximation for skis and a poor one for boards. Both pages state the contrast rather than pretending one rule covers both.
What size hockey skate do I need for my shoe size?
About 1.5 sizes below your men's US shoe size, because a skate is meant to fit snugly in a way a shoe is not. Watch the tier as well as the number: Youth, Junior and Senior are separate scales that restart, so a Junior 5 and a Senior 5 are different skates.
Is a skateboard sized by length or width?
Width, in inches, and it tracks your shoe size so your feet sit properly on the deck. Length is not the spec people shop by. Trucks are matched to the deck's published width range, never to axle width: an Indy 129 has an 8.0 inch axle but fits a 7.4 to 7.8 inch deck.
Do boxing glove ounces mean hand size?
No. The ounce is the weight of the padding, not a measure of your hand. Purpose matters more than body weight: bag gloves protect you and run lighter, while sparring gloves protect the person you are hitting, which is why 16 oz is the usual answer for an adult regardless of weight.
Why do sports sizing charts disagree with each other?
Because most of this gear has conventions rather than standards. Retailers publish tables built from their own experience and those tables genuinely differ, sometimes by a full size. Where they disagree we take the middle of the published range and say so, and we defer to your gym or sanctioning body where they set a rule.
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