Kayak Trip Distance Calculator

Trip planning is one of the most important safety skills in sea kayaking and touring. Underestimating how far you need to paddle, especially against a headwind or tide, can turn a pleasant day trip into an emergency.

The basic formula is: Distance = Speed × Time

But effective trip planning requires accounting for:

Paddling speed by kayaker level:

• Beginner (recreational kayak): 4-6 km/h
• Intermediate (touring kayak, fit paddler): 6-8 km/h
• Advanced / sea kayaker: 8-10 km/h
• Racing / surf ski: 10-14 km/h

Rest breaks: Plan 10 minutes of breaks per hour of paddling. A 6-hour trip includes approximately 1 hour of breaks, leaving only 5 hours of actual paddling time.

Wind and current:

• Headwind of 15 km/h: reduces speed by ~2 km/h
• Tailwind: adds 0.5-1.5 km/h (less effect than headwind due to drag)
• 1-knot current with you: adds 1.85 km/h
• 1-knot current against you: subtracts 1.85 km/h

Notice how much bigger the current term is than the wind term. A single knot of tidal stream moves the number further than a stiff breeze does, which is why the ±2 km/h box below covers wind and a gentle current but nothing like a spring tide through a narrows. For anything past about a knot, work the leg out on the tidal current calculator and enter the resulting speed over ground here as your cruising speed.

The rule of thirds: In sea kayaking, plan to use one-third of your energy getting out, one-third returning, and keep one-third in reserve for emergencies (unexpected weather, rescue assistance, route changes). This means your effective one-way range is only one-third of your total paddling capacity.

Read that carefully, because it is easy to lose a factor of two in it. If your day’s total capacity is 30 km, the rule does not mean a 30 km round trip with a margin. It means you turn around at 10 km out, paddle 10 km back, and the remaining 10 km of capacity never gets used unless something goes wrong. That reserve is the point of the rule, not slack to be spent.

Tidal windows: Many coastal routes are only passable during certain tidal states. Always check tidal stream atlases and plan your trip around the favorable tide window.