Free gear calculators that give you a usable answer
Size a weighted vest, plan water and pack volume, check carry-on gear, estimate sleeping-bag warmth, and build a safer trip.
Camp power, figured out
Size a station, estimate CPAP and fridge runtime, plan a solar refill, and check whether a panel is electrically compatible.
Fitness
6 tools
Weighted-Vest Sizing Calculator
How heavy a vest to start with, plus a safe progression.
Walking Pad Fit Checker
Which walking pad fits your height, weight, desk, and floor space.
Home Cardio Space Checker
Will a rowing machine, exercise bike, or walking pad fit your room?
Which Weighted Vest? Quiz
Answer three questions, get matched to the right vest.
Weighted-Vest Walking Plan Builder
A multi-week weighted-walking plan built around your level.
Beginner Walking Plan Builder
A free 8-week beginner walking plan built around your week.
Camp
2 tools
Hike
7 toolsHiking Layering Advisor
What to wear on the trail, from temperature, effort, wind, and rain.
Winter Traction Chooser
Ice cleats, spikes, snowshoes, or crampons? Match traction to the conditions.
Hiking Water Calculator
How much water to carry for the distance and the heat.
Power Bank Size Calculator
How big a power bank your trip needs, and whether it can fly.
Outdoor Shoe Finder
Five questions match you to the right outdoor shoes, men's and women's.
Backpack Size Selector
What size pack (in liters) your trip actually needs.
Backpacking Base-Weight Builder
Add up your pack base weight and see where to cut.
Travel
3 tools
Parks
3 tools
Browse our fitness gear or read how we research and rate.
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