Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Magnetic Declination Adjuster

Convert a compass (magnetic) bearing to a true bearing by applying the local magnetic declination. Essential for accurate navigation in hiking, sailing, and surveying where map bearings are true north.

Compass Bearing (°)

Magnetic Declination (°)

Fill in the required fields to see your result.

Geography

Heat Island Effect Calculator

Estimate the intensity of the urban heat island effect by comparing city and rural temperatures, adjusted for wind speed. Use this when studying urban climate, planning green infrastructure, or assessing cooling needs.

Urban Temperature (°C)

Rural Temperature (°C)

Wind Speed (m/s)

Fill in the required fields to see your result.

Key differences

	Magnetic Declination Adjuster	Heat Island Effect Calculator
Category	Geography	Geography
Inputs required	2	3
Result	True Bearing (°)	Heat Island Intensity (°C)
What it does	Convert a compass (magnetic) bearing to a true bearing by applying the local magnetic declination. Essential for accurate navigation in hiking, sailing, and surveying where map bearings are true north.	Estimate the intensity of the urban heat island effect by comparing city and rural temperatures, adjusted for wind speed. Use this when studying urban climate, planning green infrastructure, or assessing cooling needs.