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Know what your pack weighs, every day of the trip.

bxpk keeps your gear list down to the last ounce, then carries it through the whole trip: base weight, food, water and fuel for each day, resupply stops, and the gear your group splits.

See how it works

Coming soon to the App Store, for iPhone on iOS 17 and later

8,000 ft10,000 ft12,000 ftTrailheadMile 0.0, 9,360 ftPiute PassMile 5.5, 11,423 ftMuir Trail RanchMile 18.0, 7,700 ftMuir PassMile 38.0, 11,955 ftBishop PassMile 55.0, 11,972 ftSouth LakeMile 61.4, 9,768 ftDay 120.33 lbDay 219.31 lbDay 326.52 lbDay 425.51 lbDay 521.19 lbDay 620.17 lbDay 716.95 lb
8,000 ftTrailhead9,360 ftPiute Pass11,423 ftMuir Trail Ranch7,700 ftMuir Pass11,955 ftBishop Pass11,972 ftSouth Lake9,768 ftDay 120.33 lbDay 326.52 lbDay 716.95 lb

Trailhead, mile 0, 9,360 ft

Mile 0.0, Trailhead, 9,360 ft

Your gear list, down to the last ounce

Sort every item by category and mark it packed, worn or consumable. Weights in ounces or grams, your choice. Base weight and skin-out weight update as you type. Group items into systems, save a whole pack, and load it onto a trip in one tap.

    • Two-person trekking pole tentPacked1.90 lb
    • Polycryo footprintPacked6.6 oz
    • 8 titanium stakesPacked3.4 oz

Worn items stay out of base weight: 2.60 lb of clothing, trail runners and trekking poles on this trip.

Saved as the pack “Sierra summer kit”, 10.19 lb, it loads onto the next trip in one tap.

Share of base weight

8 categories
  • Shelter25%
  • Sleep system28%
  • Pack18%
  • Clothing10%
  • Cooking8%
  • Water4%
  • Electronics5%
  • Misc2%

Mile 7.8, Day 1 camp, 10,290 ft

Meals planned to the calorie

Your daily calorie target comes from your pack weight and the miles ahead. Place food into breakfast, lunch, dinner and snacks, and each day shows its kcal, food weight and the boil water you will need.

Fat 128 gCarbs 414 gProtein 108 gFood 900 gBoil water 1,450 mL

250 kcal over target

Day 1, by meal

3,250 kcal

Against the target

Meal plan for day 1: 3,250 kcal against a 3,000 kcal target, with breakfast, lunch, dinner and a snack
The meal plan in the app

Mile 18.0, Muir Trail Ranch, 7,700 ft

Pack weight for every day of the trip

Food and water come off the scale as the days pass and go back on at each resupply. See your heaviest day at the kitchen table, not halfway up the climb.

Heaviest day
Day 3, 26.52 lb
Muir Trail Ranch, day 3
+7.21 lb
Trail's end
16.95 lb

Picked up there: 20 food items and 1 fuel container.

Pack weight by day

Sample trip, 7 days
0 lb10 lb20 lb30 lbDay 1Day 2Day 3Day 4Day 5Day 6Day 7+7.21 lb
  • Base
  • Food
  • Water
  • Fuel
  • Skin-out weight
  • Resupply

Water per day

Day 1
2.5 L
Day 2
3.0 L
Day 3
2.5 L
Day 4
3.0 L
Day 5
2.0 L
Day 6
2.5 L
Day 7
2.0 L
Resupply screen: pack weight by day from 20.33 lb to 16.95 lb, with Muir Trail Ranch on day 3 adding 7.21 lb

Mile 38.0, Muir Pass, 11,955 ft

Shared gear, split fairly

Put the tent, the stove and the filter into a group pool. Friends claim a seat on each item, and everyone carries their share of the weight instead of guessing at the trailhead.

  • Two-person trekking pole tent

    2.53 lb, 2 of 2 seats claimed

    1.26 lb each

  • Stove, pot and 230 g fuel canister

    1.35 lb, 3 of 3 seats claimed

    7.2 oz each

  • Squeeze water filter

    3.0 oz, 2 of 2 seats claimed

    1.5 oz each

Rowan carries 1.81 lb, 2.26 lb less than going solo.

Plan a trip, start to finish

  1. Map the days.

    Enter miles and elevation gain for each day, or import a GPX track. Water per day comes with it, and a NOAA forecast arrives for every trip day in the US.

    Itinerary for a 7-day trip, 61 mi and 14,969 ft of gain in all, with miles, gain and water for each day
    Screenshot from the app, taken after the sample trip, with sample data.

  2. Load the pack.

    Pick a saved pack or add items one at a time. Base weight shows up with the first item, 10.19 lb on this trip, and worn, consumable and skin-out weights follow as you go.

    Trip screen for North Lake to South Lake, Sep 25 to Oct 1, 2026: base weight 10.19 lb, worn 2.60 lb, consumables 20.06 lb, total pack 30.25 lb, and the trip marked ready
    Screenshot from the app, taken after the sample trip, with sample data.

  3. Record the route.

    Draw the route on the map or import a GPX track, then record it with GPS on the trail, at every fix or every 15 s, 30 s or 60 s to save battery. When a route and its trip disagree, the app says so: this 4-day loop on a 3-day group trip offers to match the dates or move a camp.

    Route screen for a group trip: a 65.2 mi loop with 14,153 ft of gain over 4 days, drawn on a map, with a note that the route covers 4 days and the trip has 3
    Screenshot from the app, taken after the sample trip, with sample data.

  4. Debrief and share.

    Back home, finalize the trip. Your base weight joins your profile's trend, 1.37 lb short of an 8.82 lb goal here, and you can post the loadout to the community.

    Profile screen: base weight 10.19 lb against an 8.82 lb goal, above a base weight trend that falls over five trips
    Screenshot from the app, taken after the sample trip, with sample data.

Mile 61.4, Trail's end, South Lake, 9,768 ft

Lighter, trip after trip

Finalize a trip and its base weight joins your trend, next to the goal you set.

Base weight by trip

Sample profile
8 lb9 lb10 lb11 lb12 lb13 lb14 lbGoal: 8.82 lbBig Pine LakesThousand Island LakeCottonwood LakesLittle Lakes ValleyEvolution Basin8 lb9 lb10 lb11 lb12 lb13 lb14 lbGoal: 8.82 lbBig Pine LakesEvolution Basin

Axis starts at 8 lb

A trail community that counts every ounce

Post a loadout with its base weight and category breakdown, ask the forums about a shelter, and see what your friends cut before the season starts.

Sample posts

  • juniper.walks

    2 h ago, Posted a loadout

    9.28 lbbase weight

    1.41 lb lighter since June

    Swapped the freestanding tent for a trekking pole shelter and finally left the second fleece at home.

    48 votes12 comments

  • ridge.and.fern

    5 h ago, Shelters forum

    11.77 lbbase weight

    Trekking pole tent or freestanding for the Sierra in October?

    Cold nights and granite pads. Base weight 11.77 lb now, and the tent is the biggest line on it.

    23 votes31 comments

  • high.route.hen

    1 d ago, Posted a loadout

    10.76 lbbase weight

    Food at 1.50 lb per day

    Got food down to 1.50 lb per day at 3,100 kcal by trading dinner potatoes for olive oil and tortillas.

    36 votes9 comments

  • trail.of.crumbs

    2 d ago, Resupply forum

    11.07 lbbase weight

    Is 10.43 lb too much food for 5 days out of a Muir Trail Ranch bucket?

    Planning 1.98 lb per day plus one 8.1 oz canister. Would you cut a day of snacks or carry it?

    11 votes17 comments

  • alpine.ash

    3 d ago, Posted a gear swap

    9.85 lbbase weight

    7.4 oz lighter since May

    Traded the 1.1 L pot set for a 750 mL titanium pot and a long spoon. Same dinners, 7.5 oz gone.

    29 votes6 comments

Your pack is your business

Read the privacy policy

  1. This site sets no cookies.

    It runs no analytics and no advertising, and stores nothing in your browser, so there is no banner to click through.

  2. We do not sell personal information.

    Not your gear, not your trips, not your account.

  3. Body measurements stay yours.

    Height, body weight, birthdate and biological sex estimate the calories a day on trail burns, and your birthdate confirms you meet the minimum age. They are never shown to anyone else and never used for ads.

  4. Your recorded route stays on your phone.

    A route you record leaves your iPhone only if you export or share the GPX file yourself, or share it on a post.

  5. Ads never read your pack.

    The app shows ads, but your gear, trips, routes, posts and measurements are never used to target them.

Weigh it at home. Carry it with confidence.

bxpk is free on iPhone, offered in the United States and Canada.

Coming soon to the App Store, for iPhone on iOS 17 and later

South Lake trail's end, mile 61.4, 9,768 ft

  • 7 days, 61.4 mi walked
  • 16.95 lb at trail's end
  • 20 food items and 1 fuel container picked up at Muir Trail Ranch
Profile screen: base weight 10.19 lb against an 8.82 lb goal, 1.37 lb to go, above a base weight trend that falls over five trips