Kayak Load Capacity Calculator

Work out kayak load capacity instantly with clear inputs, formula shown and shareable results.

About Kayak Load Capacity Calculator

Manufacturer capacity is the weight at which the kayak still floats, not the weight at which it performs. Working capacity is 70-90% of that depending on conditions, because a heavily loaded hull sits low, becomes sluggish and takes water far more easily in waves.

Formula

Kayak capacity

working maximum = stated capacity x conditions factor; remaining = working maximum - paddler - gear

Worked example

With the default values below, Kayak Load Capacity Calculator returns Remaining capacity of 24.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Manufacturer maximum capacity: 160 kg
Paddler weight: 82 kg
Gear weight: 22 kg
Conditionsone of Flat water, Coastal, Open water / rough: Coastal

Results

Remaining capacity: 24.00 kg
Recommended working maximum: 128.00 kg
Current total load: 104.00 kg
Assessment: Comfortably within capacity

Step by step

1Values used
2Kayak capacity
3Remaining capacity= 24.00 kg
4Recommended working maximum= 128.00 kg
5Current total load= 104.00 kg
6Assessment= Comfortably within capacity

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why derate the stated capacity?

Stated capacity is a flotation limit. At that load the hull is deeply immersed, freeboard is minimal and handling degrades badly in any sea state.

Where should gear be placed?

Low and near the centre, balanced fore and aft. Weight high or at the ends makes the kayak unstable and hard to turn.