Outdoor tools
Calculators and checklists for hiking, fishing, camping, and leisure sports organized by group.
Plan hiking, fishing, camping, water sports, and outdoor sport sessions from one app.
Outdoor app structure
Implemented features open directly, and duplicate functions link to existing Util Monster tools. Planned items do not emit broken links.
Hiking and trekking
Trail time, hydration, pack weight, GPX files, bearing, and safety checks.
Distance and elevation difficulty calculator
Use the Distance and elevation difficulty calculator to calculate practical planning results from your outdoor activity inputs.
Grade angle and percent converter
Use the Grade angle and percent converter to calculate practical planning results from your outdoor activity inputs.
Elevation gain rate calculator
Use this browser-side helper for Elevation gain rate calculator.
Sunset descent margin calculator
Use this browser-side helper for Sunset descent margin calculator.
Recommended hiking start time calculator
Use this browser-side helper for Recommended hiking start time calculator.
Hiking water calculator
Estimate trail water from duration, temperature, altitude, and body weight.
Backpack weight calculator
Calculate a recommended pack-weight range from body weight and trip style.
Hiking checklist
Build and save a gear checklist by season and hike type.
Seasonal hiking gear generator
Generate season-specific hiking gear for spring, summer, autumn, or winter.
Temperature and altitude clothing recommender
Use this browser-side helper for Temperature and altitude clothing recommender.
Altitude temperature change calculator
Use this browser-side helper for Altitude temperature change calculator.
Altitude sickness risk reference
Use the Altitude sickness risk reference to calculate practical planning results from your outdoor activity inputs.
GPX distance and elevation analyzer
Parse GPX locally in the browser for distance, ascent, descent, and altitude range.
GPX to KML converter
Convert GPX tracks to KML LineString files entirely in the browser.
Compass bearing calculator
Calculate initial bearing and great-circle distance between two coordinates.
Hiking group speed calculator
Use this browser-side helper for Hiking group speed calculator.
Headlamp runtime calculator
Use this browser-side helper for Headlamp runtime calculator.
Power bank runtime calculator
Estimate charges and extra runtime from capacity, device battery, and efficiency.
Hiking safety checklist
Check weather, descent time, contacts, and procedure before leaving.
Hiking log card generator
Use this browser-side helper for Hiking log card generator.
Avalanche slope reference
Use the Avalanche slope reference to calculate practical planning results from your outdoor activity inputs.
UV exposure reference calculator
Use the UV exposure reference calculator to calculate practical planning results from your outdoor activity inputs.
Naismith hiking pace calculator
Open Naismith hiking pace calculator to calculate inputs and organize the results.
Hiking slope calculator
Open Hiking slope calculator to calculate inputs and organize the results.
Hiking calories calculator
Open Hiking calories calculator to calculate inputs and organize the results.
Backpacking food calorie calculator
Open Backpacking food calorie calculator to calculate inputs and organize the results.
Feels-like temperature calculator
Open Feels-like temperature calculator to calculate inputs and organize the results.
Trekking pace calculator
Open Trekking pace calculator to calculate inputs and organize the results.
Arrival time with breaks calculator
Open Arrival time with breaks calculator to calculate inputs and organize the results.
Coordinate format converter
Open Coordinate format converter to calculate inputs and organize the results.
Map scale distance calculator
Open Map scale distance calculator to calculate inputs and organize the results.
Fishing
Line, sinker, casting, species rules, trip cost, and catch logs.
Fishing line capacity calculator
Use the Fishing line capacity calculator to calculate practical planning results from your outdoor activity inputs.
Line diameter and size converter
Use the Line diameter and size converter to calculate practical planning results from your outdoor activity inputs.
PE braided line size converter
Use the PE braided line size converter to calculate practical planning results from your outdoor activity inputs.
Sinker size and weight converter
Use the Sinker size and weight converter to calculate practical planning results from your outdoor activity inputs.
Fish length to weight calculator
Use the Fish length to weight calculator to calculate practical planning results from your outdoor activity inputs.
Fishing trip checklist
Use the Fishing trip checklist to calculate practical planning results from your outdoor activity inputs.
Casting distance calculator
Use the Casting distance calculator to calculate practical planning results from your outdoor activity inputs.
Reel gear retrieve calculator
Use the Reel gear retrieve calculator to calculate practical planning results from your outdoor activity inputs.
Rod power and line guide
Use this browser-side helper for Rod power and line guide.
Sinker weight by depth recommender
Use this browser-side helper for Sinker weight by depth recommender.
Wind and point direction calculator
Use this browser-side helper for Wind and point direction calculator.
Fishing knot selection guide
Use the Fishing knot selection guide to calculate practical planning results from your outdoor activity inputs.
Fish minimum size checker
Use the Fish minimum size checker to calculate practical planning results from your outdoor activity inputs.
Fish closed season calendar
Use the Fish closed season calendar to calculate practical planning results from your outdoor activity inputs.
Catch log
Use this browser-side helper for Catch log.
Fishing cost calculator
Use the Fishing cost calculator to calculate practical planning results from your outdoor activity inputs.
Tide term converter
Use the Tide term converter to calculate practical planning results from your outdoor activity inputs.
Seawater salinity calculator
Use this browser-side helper for Seawater salinity calculator.
Fish target by water temperature
Use this browser-side helper for Fish target by water temperature.
Lure weight unit converter
Open Lure weight unit converter to calculate inputs and organize the results.
Boat fishing cost split
Open Boat fishing cost split to calculate inputs and organize the results.
Camping and water outdoor
Camping checklists, water, power, fuel, and surf, dive, and kayak reference calculators.
Camping checklist
Save a checklist by camping style, people, and season.
Camping water calculator
Calculate drinking and reserve water by people, nights, and activity level.
Camping power usage calculator
Add device watts and hours to estimate required battery Wh.
Power station runtime calculator
Estimate runtime from power-station Wh, device watts, and efficiency.
Camping gas fuel calculator
Estimate canister count from burner output, usage time, and can size.
Firewood calculator
Use the Firewood calculator to calculate practical planning results from your outdoor activity inputs.
Surfboard volume calculator
Use the Surfboard volume calculator to calculate practical planning results from your outdoor activity inputs.
Diving air consumption calculator
Use the Diving air consumption calculator to calculate practical planning results from your outdoor activity inputs.
Scuba MOD calculator
Use the Scuba MOD calculator to calculate practical planning results from your outdoor activity inputs.
Kayak paddle length calculator
Use the Kayak paddle length calculator to calculate practical planning results from your outdoor activity inputs.
Camping food calculator
Open Camping food calculator to calculate inputs and organize the results.
Tent size recommender
Open Tent size recommender to calculate inputs and organize the results.
Sports records and scores
Bike, running, ski, golf, bowling, billiards, and bracket tools kept in the app inventory.
Bike cadence and gear speed calculator
Use the Bike cadence and gear speed calculator to calculate practical planning results from your outdoor activity inputs.
Cycling calories calculator
Use the Cycling calories calculator to calculate practical planning results from your outdoor activity inputs.
Bike tire pressure reference
Use the Bike tire pressure reference to calculate practical planning results from your outdoor activity inputs.
Marathon time predictor
Use the Marathon time predictor to calculate practical planning results from your outdoor activity inputs.
Running split calculator
Use the Running split calculator to calculate practical planning results from your outdoor activity inputs.
Interval training generator
Use this browser-side helper for Interval training generator.
Grade-adjusted pace calculator
Use the Grade-adjusted pace calculator to calculate practical planning results from your outdoor activity inputs.
Ski binding setup worksheet
Use the Ski binding setup worksheet to calculate practical planning results from your outdoor activity inputs.
Golf handicap calculator
Use the Golf handicap calculator to calculate practical planning results from your outdoor activity inputs.
Golf club distance log
Use this browser-side helper for Golf club distance log.
Golf Stableford calculator
Use the Golf Stableford calculator to calculate practical planning results from your outdoor activity inputs.
Billiards score log
Use this browser-side helper for Billiards score log.
Bike speed distance time calculator
Open Bike speed distance time calculator to calculate inputs and organize the results.
Bike gear ratio calculator
Open Bike gear ratio calculator to calculate inputs and organize the results.
Running pace calculator
Open Running pace calculator to calculate inputs and organize the results.
Bowling score calculator
Open Bowling score calculator to calculate inputs and organize the results.
Badminton and table tennis bracket generator
Open Badminton and table tennis bracket generator to calculate inputs and organize the results.
Leisure cost splitter
Open Leisure cost splitter to calculate inputs and organize the results.
Ski slope converter
Open Ski slope converter to calculate inputs and organize the results.
Related existing tools
Naismith hiking pace calculator
Hiking slope calculator
Hiking calories calculator
Backpacking food calorie calculator
Feels-like temperature calculator
Trekking pace calculator
Arrival time with breaks calculator
Coordinate format converter
Map scale distance calculator
Lure weight unit converter
Boat fishing cost split
Camping food calculator
Tent size recommender
Bike cadence and gear speed calculator
Cycling calories calculator
Bike tire pressure reference
Marathon time predictor
Running split calculator
Grade-adjusted pace calculator
Ski binding setup worksheet
Golf handicap calculator
Golf Stableford calculator
Bike speed distance time calculator
Bike gear ratio calculator
Running pace calculator
Bowling score calculator
Badminton and table tennis bracket generator
Leisure cost splitter
Ski slope converter
Frequently asked questions
Why are fishing and sports items included?
They share the same outdoor planning flow, so calculators and checklists are grouped here and linked only when they open as usable tools.
Are GPX files uploaded to the server?
No. GPX analysis and KML conversion read the file in your browser and do not send it to a server or external API.
Can I rely on safety and health calculations?
No. Altitude, avalanche, UV, diving, and ski tools are references only; field conditions and professional guidance come first.