Weather Calculators
What does it actually feel like outside? Wind chill and heat index translate forecast numbers into body impact; dew point explains the mugginess; cloud base tells you whether the flight or the hike is on. The weather calculators use official formulas (NWS-standard where applicable) and give instant answers, right in your browser.
10 tools, ready when you are
- Wind Chill Calculator NWS wind chill from air temperature and wind speed, in °F and °C, with frostbite-time bands. Weather
- Heat Index Calculator NWS heat index (Rothfusz regression) from temperature and humidity, with caution-to-danger bands. Weather
- Cloud Base Calculator Estimate convective cloud base height from temperature and dew point, in feet and meters. Weather
- Snow Load Calculator Roof snow load from snow depth and snow type, in psf, kg/m² and kPa — plus total weight. Weather
- Rainwater Harvesting Calculator Roof area × rainfall → harvestable water in liters and gallons, adjusted by roof surface type. Weather
- Dew Point Calculator Turn air temperature and relative humidity into the dew point with the Magnus formula, plus a comfort read. Weather
- Beaufort Scale Calculator Convert wind speed to Beaufort force 0–12 and back, with the sea state, land signs and wave heights. Weather
- Degree Days Calculator Sum heating and cooling degree days from daily mean temperatures against any base temperature. Weather
- Wet-Bulb Temperature Calculator Compute the Stull wet-bulb temperature from air temperature and humidity, with a heat-stress band. Weather
- Storm Distance Calculator Count the seconds from lightning flash to thunder and get the storm's distance plus 30/30 safety guidance. Weather
No matches yet.
Try a different word or pick another topic.