Outdoor Safety & Survival

Simulate an earthquake alarm with a countdown and visual instructions for Drop, Cover, and Hold On.

Displays the national poison control number and basic first steps for common household ingestions. Seek medical help immediately.

Reference hotline poison control reference

Generate a comprehensive first aid kit list for home, car, or hiking. Check off what you have.

Checklist checklist first aid kit wound care

Calculate the bearing (azimuth) and distance between two GPS coordinates using the Haversine formula. Great for orienteering. Local only.

Calculator azimuth bearing compass GPS

Play standard emergency whistle patterns (SOS, three blasts) using Web Audio. Learn signals for outdoor safety. Offline capable after load.

Generator audio emergency SOS whistle

Enter a common chemical name to see summary hazard pictograms and precautions. Quick reference.

Reference lookup safety data sheet SDS

Tap when you see lightning, tap again when you hear thunder. Calculates how far away the storm is in miles/km. Important outdoor safety tool.

Calculator calculator distance lightning storm

Checklist of essential supplies for a tornado safe room. Print and prepare before storm season.

Checklist checklist safety tornado

Calculate how many gallons of water to store based on household size and days. Preparedness aid.

Calculator calculator emergency water storage

Convert carabiner strength from kN to kg/lbs and understand Major Axis vs Minor Axis markings. Quick educational reference for climbers.

Reference carabiner climbing kN rating

Learn to tie essential knots with step-by-step animated diagrams. Includes bowline, square knot, clove hitch, and more. Pure CSS/JS animation.

Guide animated guide knot survival

Estimate hiking time using Naismith's rule (distance + elevation gain). Adjust for terrain and fitness. Plan your outdoor adventure.

Calculator elevation estimator hiking pace