12 tools live

Tools that size your gear to you

Free calculators and quizzes that tell you what is right for you, across every category. Free to use, and free to embed.

Fitness

4 tools

How heavy a vest to start with, plus a safe progression.

Answer three questions, get matched to the right vest.

A multi-week weighted-walking plan built around your level.

A free 8-week beginner walking plan built around your week.

2 tools

Will you be warm enough? Bag rating plus pad and clothing.

How much fuel to pack for the trip, by meals and people.

3 tools

What size pack (in liters) your trip actually needs.

Add up your pack base weight and see where to cut.

How much water to carry for the distance and the heat.

3 tools

Will your bag fit? Check it against airline size limits.

Is an America the Beautiful pass worth it for your 2026 trip?

Which national park should you visit? Answer four questions.

New tools ship regularly. In the meantime, browse our fitness gear or read how we research and rate.