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Paddle Board (SUP) Volume Calculator

Find the right stand-up paddle board volume in liters from your weight, extra load (gear, child or dog) and skill level, with a volume range and typical board length and width.

Units

Paddler weight

Extra load (gear, child, dog)

Skill level

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How it works

Volume (L) = (paddler weight + extra load, in kg) × liters per kg · beginner 2.0, intermediate 1.4, advanced 1.0, expert or surf SUP 0.8 · 1 lb = 0.4536 kg.

One liter of board volume floats about one kilogram, so a board’s volume compared with the load on it decides how stable it feels. Beginners want roughly twice their weight in liters so the board sits high and forgiving; experienced paddlers and SUP surfers ride boards close to their weight for maneuverability. Include anything else that rides on the board — a cooler, a child or a dog. Width matters as much as volume for stability, so first-timers should also look for 32 inches (81 cm) or wider.

Worked example

A 75 kg beginner who brings 5 kg of gear puts 80 kg on the board. Volume = 80 × 2.0 = 160 L, with a sensible range of 144–176 L. A typical beginner board is 320–350 cm long and 81–86 cm wide.

Sources: Camper Upgrade — Paddle board volume calculator (liters per kg by skill) · REI Expert Advice — How to choose a stand up paddle board

Frequently asked questions

What size paddle board do I need for my weight?

Multiply your weight plus gear in kg by about 2.0 L/kg as a beginner, 1.4 as an intermediate and 1.0 as an advanced paddler. An 80 kg beginner load needs roughly 160 L.

Does a paddle board have a weight limit?

Makers list a maximum capacity, but a board loaded close to it sits low and feels tippy. For comfortable paddling, keep the load well below the limit — the volume rule above does that automatically.

Are inflatable boards different?

Inflatable boards are usually thicker (15 cm / 6 in) and so have plenty of volume; stability then depends mainly on width and length. Use the volume as a check and favor 81+ cm (32+ in) width if you are new.

What volume is best for SUP surfing?

Surf SUPs are short and low-volume — often 0.8–1.0 L per kg — so they turn easily on a wave. They are hard to stand on in flat water, so most people progress to them gradually.

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This calculator is for educational purposes. Double-check important results before acting on them.