Hiking & Backpacking Calculators

These free tools solve the math problems that come up before every trip: how many calories will you burn on a 12-mile day, how much fuel do you need for a 4-day stove cook plan, what R-value sleeping pad is appropriate for the temperatures you're expecting, how heavy is your packed kit really getting. Each calculator runs in your browser — no account required, no email gate, no ads tracking your input. You can use them on the trailhead with cell signal or pre-trip from a laptop.

The hiking pace calculatoruses Naismith's rule plus Tobler's slope adjustment so you get realistic time estimates for hilly terrain, not just flat-ground averages. The backpacking calories calculator factors body weight, pack weight, distance, and elevation gain to predict daily energy needs more accurately than generic "2,500 calories" advice. The fuel calculator covers canister, alcohol, and white-gas stoves with realistic boil-time data. The gear weight calculator lets you build a complete kit list and see where weight is hiding before you commit to a load.

All tools are free. If you want gear recommendations to pair with the calculations, head to the Best Gear index or read our sleeping pad R-value guide for context on what the calculator outputs actually mean.