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100% browser-based · no account · instant answers

Trip math for the trail,
without the guesswork

Six free calculators for hikers, backpackers and campers: check your pack weight against your body weight, estimate hiking time from distance and elevation, ration camp food and water, amortize gear cost per trip, and score a hike's real difficulty.

Pack weight vs. body weightNaismith's-rule paceElevation difficulty scoreFree forever
Backpack Weight CalculatorEnter your base weight (tent, sleeping bag, pack), consumables (food, water, fuel), worn weight and body weight to see your total pack weight and what percentage of your body weight you're carrying.Trail Pace & Time EstimatorEnter distance, elevation gain, flat-ground pace and a pack-weight slowdown factor to estimate total hiking time using a Naismith's-rule-style calculation, plus the start time you need for a given finish.Camp Food & Calorie Ration PlannerEnter trip days, number of hikers, target calories per person per day and average calorie density of your food to see total calories needed, total food weight and estimated food cost.Gear Cost-Per-Trip AmortizerEnter a gear item's purchase price, expected number of uses and yearly maintenance cost to see the real cost per trip, plus the break-even number of trips versus renting the same gear.Elevation Gain Difficulty ScoreEnter distance, elevation gain, elevation loss and pack weight to compute a Shenandoah-style composite difficulty score and see which of five difficulty bands your hike falls into.Water Purification & Resupply PlannerEnter trip days, hikers, water needed per person per day and your filter's treatment time to see total water needed and daily treatment cycles, plus liters to carry between known water sources.

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Plan the trip, not just the pack

Start with the backpack weight calculator to check your load against your body weight, then use the trail pace & time estimator to know when you'll actually get back to the trailhead. The camp food & calorie ration planner and water purification & resupply planner cover consumables, while the gear cost-per-trip amortizer and elevation gain difficulty score help you budget gear and rate the hike itself.

More tools

Backpack Weight CalculatorEnter your base weight (tent, sleeping bag, pack), consumables (food, water, fuel), worn weight and body weight to see your total pack weight and what percentage of your body weight you're carrying.Trail Pace & Time EstimatorEnter distance, elevation gain, flat-ground pace and a pack-weight slowdown factor to estimate total hiking time using a Naismith's-rule-style calculation, plus the start time you need for a given finish.Camp Food & Calorie Ration PlannerEnter trip days, number of hikers, target calories per person per day and average calorie density of your food to see total calories needed, total food weight and estimated food cost.Gear Cost-Per-Trip AmortizerEnter a gear item's purchase price, expected number of uses and yearly maintenance cost to see the real cost per trip, plus the break-even number of trips versus renting the same gear.Elevation Gain Difficulty ScoreEnter distance, elevation gain, elevation loss and pack weight to compute a Shenandoah-style composite difficulty score and see which of five difficulty bands your hike falls into.Water Purification & Resupply PlannerEnter trip days, hikers, water needed per person per day and your filter's treatment time to see total water needed and daily treatment cycles, plus liters to carry between known water sources.

Frequently asked questions

Is AdventureKit really free, with no account needed?

Yes — every calculator runs entirely in your browser with no sign-up, no data collection and no cost. Nothing you type is sent to a server.

Who is AdventureKit built for?

Hikers, backpackers and campers planning a day hike or a multi-day trip who want a quick, clear-headed way to sanity-check pack weight, pace, food, gear cost and water needs before they set out.

How accurate are these estimates on real trail?

They're planning estimates built on commonly used rules of thumb (like Naismith's rule for pace and Shenandoah-style difficulty scoring), not guarantees. Fitness, weather, footing, and how many breaks you take all shift the real numbers — use these to plan, then adjust from your own experience.

Can these tools replace trip research or a map?

No — they're planning aids, not navigation or safety tools. Always carry a map, check current trail and water conditions, and tell someone your planned route and return time.