Free · See how elevation changes sun times

Observer Height Sunrise Calculator

Compare sea-level sunrise and sunset with an observer standing above the horizon.

SunCalc 2 astronomy
Private in your browser
JSON and CSV downloads

Compare height times

Use the sample place or enter coordinates. All times use the chosen time zone.

Choose place and timeCoordinates stay on this device

Sample place

LatitudeLongitude

Time zoneUse an IANA name, such as Europe/London.

Date

Height above visible horizon

This is not always the same as elevation above sea level.

Read the sky planToronto · America/Toronto

Your local result will appear hereUse the sample place, then press the gold button.

Three simple steps

How to use it

Enter your height above the horizon.
Choose the place and date.
Compare sea-level and raised times.

Your place stays on this device

SunCalc does the sky math inside this browser tab. Bookify does not upload or save coordinates, dates, or times. Results assume a clear, level horizon; terrain, weather, and buildings can change what you see.