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Outdoors & Recreation Tools
901 free calculators, converters and checkers — built for SG, MY and the region, reviewed with current figures. No accounts, no paywalls.
Rode length to let out for safe anchoring
Wind components from runway heading
Pressure + density altitude for takeoff performance
How muggy will it feel? Dew point from temperature and humidity
Calories burned hiking — with pack weight, grade and terrain
Flash-to-bang distance + the 30-30 rule
Estimate walking time over distance + ascent
Sunrise, sunset, golden hour and day length for anywhere
TAS from CAS, altitude and temperature
The heat number outdoor work and sport rules are actually written against — and an honest refusal when it cannot be estimated.
Feels-like temperature, hot or cold