All Free Camping & Outdoor Calculators
Browse all 114 free calculators across 12 categories. Every tool uses metric measurements and established outdoor formulas.
Calculate pack weight, gear lists, sleeping bag ratings, tent capacity and backpack volume for your trip.
Pack Weight Calculator
Calculate your total pack weight including base weight, consumables and worn items.
Gear List Calculator
Build a comprehensive gear list with weights and check off items as you pack.
Sleeping Bag Temperature Calculator
Find the right sleeping bag rating based on conditions, altitude and personal factors.
Tent Capacity Calculator
Calculate usable tent space per person including gear storage area.
Backpack Volume Calculator
Determine the right backpack size in litres based on trip length and gear requirements.
Stuff Sack Calculator
Calculate the right stuff sack size for your sleeping bag, clothing or equipment.
Dry Bag Calculator
Work out how many dry bags you need and what sizes for waterproof storage.
Gear Weight Comparison Calculator
Compare gear options side by side to find the lightest setup for your trip.
Layering Calculator
Plan your clothing layers based on temperature, activity level and weather conditions.
Pack Cover Calculator
Find the right pack cover size based on your backpack volume.
Ultralight Gear Substitution Calculator
Calculate weight savings from swapping standard gear for ultralight alternatives.
Bear Canister Size Calculator
Size bear canister for trip length based on people, duration and meal planning.
Calorie needs, water requirements, meal planning, fuel canister estimates and cooking calculations.
Calorie Calculator
Calculate daily calorie needs based on activity level, terrain and pack weight.
Water Requirement Calculator
Estimate water needs per day based on temperature, exertion and altitude.
Meal Planning Calculator
Plan meals for your trip with calorie targets, weight budgets and shopping lists.
Fuel Canister Calculator
Calculate how many fuel canisters you need based on meals, boil times and altitude.
Stove Burn Time Calculator
Estimate how long your stove fuel will last based on canister size and burn rate.
Food Weight Calculator
Calculate the total weight of food for your trip based on calories per gram.
Dehydrated Food Calculator
Calculate water needed to rehydrate meals and total food weight savings.
Water Purification Calculator
Calculate purification tablet or filter capacity needs for your trip duration.
Cooking Time Calculator
Adjust cooking times for altitude, temperature and stove type.
Bear Canister Calculator
Calculate the right bear canister size based on trip length and food volume.
Calorie Requirement Calculator
Calculate daily calorie needs for camping based on activity, temperature and altitude.
Stove Fuel Calculator
Calculate fuel quantity, canister count and emergency reserves for your camping stove.
Water Treatment Calculator
Calculate purification tablet or drop quantities based on water volume and treatment method.
Dehydrated Meal Calculator
Calculate water and fuel needed for rehydrating meals based on meal count and portion size.
Stove Efficiency Calculator
Compare stove fuel efficiency across gas, meths, Esbit and wood for trip planning.
Campfire Heat Calculator
Calculate campfire heat output in BTU, wood weight needed and effective warming radius based on fire type, wood species and wind conditions.
Tent footprint, tarp sizing, hammock hang angles, R-value calculations and bivvy bag sizing.
Tent Footprint Calculator
Calculate the ground area and footprint dimensions for your tent setup.
Tarp Size Calculator
Determine the right tarp size for your shelter configuration and number of occupants.
Hammock Hang Calculator
Calculate the ideal hang angle, ridge line length and tree distance for your hammock.
Ground Pad R-Value Calculator
Calculate combined R-value when stacking sleeping pads for cold weather camping.
Sleeping Pad Calculator
Find the right sleeping pad size and type based on your height, width and conditions.
Bivvy Bag Calculator
Calculate the right bivvy bag size and temperature boost for your sleeping system.
Guy Line Calculator
Calculate the total guy line length needed for your tent or tarp setup.
Tent Ventilation Calculator
Estimate ventilation requirements to reduce condensation inside your tent.
Sleep System Insulation Combiner
Combine sleeping bag, pad and liner ratings to calculate your total system comfort temperature.
Tent Condensation Calculator
Predict condensation risk inside your tent based on occupants, temperature, humidity and ventilation.
Rain Fly Angle Calculator
Calculate optimal tarp pitch angle, ground coverage, rain shedding rating and guy line lengths.
Sleeping Pad R-Value Calculator
Calculate required sleeping pad R-value from expected ground and air temperatures.
Wind chill, heat index, UV exposure, lightning distance, sunset times and safety risk assessment.
Wind Chill Calculator
Calculate the wind chill factor and feels-like temperature for exposed skin.
Heat Index Calculator
Calculate the heat index from temperature and humidity with safety warnings.
UV Exposure Calculator
Estimate safe sun exposure time based on UV index, skin type and altitude.
Lightning Distance Calculator
Calculate lightning distance using the flash-to-bang method and assess safety.
Sunset Time Calculator
Estimate sunrise and sunset times based on date and UK latitude.
Daylight Hours Calculator
Calculate hours of daylight for any date and UK location for trip planning.
Cloud Base Calculator
Estimate cloud base height from temperature and dew point readings.
Dew Point Calculator
Calculate the dew point temperature from air temperature and relative humidity.
Hypothermia Risk Calculator
Assess hypothermia risk based on temperature, wind, wetness and exposure time.
Avalanche Risk Calculator
Assess avalanche risk factors including slope angle, snow conditions and recent weather.
River Crossing Calculator
Assess river crossing safety from depth, current speed and water temperature.
Distance, trail time, calorie burn, gradient, rest stops and hiking-specific planning calculators.
Hiking Distance Calculator
Calculate total hiking distance with terrain adjustments and daily distance targets.
Naismith's Rule Calculator
Calculate hiking time using Naismith's rule with adjustments for terrain and fitness.
Trail Time Calculator
Estimate total trail time including walking, rest breaks and photo stops.
Step Counter Calculator
Convert hiking distance to approximate step count based on stride length and terrain.
Calorie Burn Calculator
Calculate calories burned while hiking based on weight, distance, elevation and pack weight.
Gradient Calculator
Calculate trail gradient as a percentage, angle in degrees and ratio from elevation and distance.
Switchback Calculator
Calculate the number of switchbacks and trail length needed to climb a steep slope.
Rest Stop Calculator
Plan rest stop frequency and duration based on distance, elevation and fitness level.
Trail Mix Calculator
Calculate trail mix quantities by ingredient with calorie and weight breakdowns.
Blister Prevention Calculator
Estimate blister risk and get prevention recommendations based on conditions.
Paddle sizing, kayak loading, float plans, river flow, tide timing and wetsuit thickness guides.
Paddle Size Calculator
Calculate the ideal paddle length based on your height, kayak width and paddling style.
Kayak Weight Capacity Calculator
Calculate remaining weight capacity after paddler weight and gear.
Float Plan Calculator
Create a float plan with estimated times, distances and checkpoint details.
River Flow Calculator
Estimate river flow speed and paddling time from distance and current conditions.
Tide Calculator
Estimate tide heights using the rule of twelfths for coastal trip planning.
Wetsuit Thickness Calculator
Find the right wetsuit thickness based on water temperature and activity duration.
PFD Size Calculator
Determine the right personal flotation device size based on chest measurement and weight.
Canoe Loading Calculator
Calculate optimal weight distribution in a canoe for stability and trim.
Rope length, belay calculations, knot strength, fall factor, anchor loads and rack planning.
Rope Length Calculator
Calculate the minimum rope length needed for your climb and rappel.
Belay Calculator
Calculate belay forces, friction and holding power for different belay devices.
Knot Strength Calculator
Compare knot types and calculate retained rope strength after tying.
Fall Factor Calculator
Calculate fall factor, impact force and energy from fall distance and rope out.
Anchor Calculator
Calculate load distribution across multiple anchor points at different angles.
Rack Calculator
Build a climbing rack list based on route grade, length and crack sizes.
Quickdraw Calculator
Calculate quickdraw requirements based on route length and bolt spacing.
Rappel Calculator
Calculate the number of rappels needed and rope length required for your descent.
Bikepacking weight, tyre pressure, gear ratios, calorie burn, pannier capacity and bike fit.
Bikepacking Weight Calculator
Calculate total loaded bike weight with frame bags, saddle bags and handlebar rolls.
Tyre Pressure Calculator
Calculate optimal tyre pressure based on rider weight, tyre width and terrain.
Gear Ratio Calculator
Calculate gear ratios, development and speed for any chainring and cassette combination.
Cycling Calorie Calculator
Calculate calories burned cycling based on speed, duration, weight and terrain.
Pannier Capacity Calculator
Calculate pannier volume requirements based on trip length and gear needs.
Chain Length Calculator
Calculate the correct chain length from chainring sizes, cassette range and chainstay length.
Spoke Length Calculator
Calculate spoke lengths from hub and rim measurements for wheel building.
Frame Size Calculator
Calculate the right bike frame size based on your height and inseam measurement.
Trip budgets, campsite costs, mileage, group gear splitting, first aid kits and permit planning.
Trip Budget Calculator
Calculate total trip costs including transport, accommodation, food and gear.
Campsite Cost Calculator
Calculate campsite costs per person per night with optional extras.
Mileage Calculator
Calculate driving distance fuel costs for getting to your campsite or trailhead.
Group Gear Splitter
Split shared group gear fairly based on individual pack weights and fitness.
First Aid Kit Calculator
Build a first aid kit checklist based on group size, trip length and remoteness.
Permit Calculator
Calculate permit costs and requirements for popular UK and international trails.
Emergency Contact Calculator
Create a comprehensive emergency contact card with key details for your trip.
Leave No Trace Calculator
Calculate waste management needs and Leave No Trace requirements for your group.
Wild Camping Checklist Calculator
Calculate gear weight and essentials checklist based on trip duration and conditions.
Route Timing Calculator
Calculate Naismith's Rule hiking time from distance, ascent, and terrain.
Battery life, pack weight distribution and equipment planning calculators for camping trips.
Battery Life Calculator
Calculate total mAh needed, power bank size, battery weight and solar panel recommendation for your trip.
Pack Weight Distribution Calculator
Optimise weight distribution across pack zones based on terrain type and pack style.
Base Weight Calculator
Calculate base pack weight from gear categories with lighterpack-style breakdown.
Useful reference guides and charts for camping, hiking and outdoor gear.
Backpack Size Guide
Recommended backpack volumes in litres by trip type from day hikes to thru-hikes.
Camping Stove Fuel Comparison
Compare camping stove fuels including gas, liquid, spirit and solid fuel types.
Sleeping Bag Temperature Ratings
EN/ISO 13537 temperature ratings explained with season guide and UK usage.
Walking Speed & Time Estimates
Typical walking speeds by terrain and gradient with Naismith's Rule explained.
Why Use CampCalcs?
Every calculator on this page is completely free, requires no signup, and works on any device. All tools use metric measurements and are based on established outdoor formulas and safety standards.
Whether you're planning a weekend wild camp, a multi-day trek or a climbing expedition, CampCalcs helps you prepare with accurate calculations for gear, food, navigation, weather and safety.