Sundial Angle Calculator

Welcome to the Sundial Angle Calculator

Enter your details into the fields below to get the angles to use for a sundial at your latitude.

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Latitude:   °   NorthSouth

Display hour lines and   no others every 30 mins every 20 mins every 15 mins every 10 mins every 5 mins

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Adjust for longitude

Longitude:   °   WestEast

Timezone: Greenwich Mean TimeUniversal Coordinated TimeEuropean Central TimeEastern European Time(Arabic) Egypt Standard TimeEastern African TimeMiddle East TimeNear East TimePakistan Lahore TimeIndia Standard TimeBangladesh Standard TimeVietnam Standard TimeChina Taiwan TimeJapan Standard TimeAustralia Central TimeAustralia Eastern TimeSolomon Standard TimeNew Zealand Standard TimeMidway Islands TimeHawaii Standard TimeAlaska Standard TimePacific Standard TimePhoenix Standard TimeMountain Standard TimeCentral Standard TimeEastern Standard TimeIndiana Eastern Standard TimePuerto Rico and US Virgin Islands TimeCanada Newfoundland TimeArgentina Standard TimeBrazil Eastern TimeCentral African Time

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Customise X,Y coordinates

 
For best results, put in a measurement a bit less than half the width of your sundial in MM

Max X and Y

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Vertical or on an incline

 
If your sundial is not on a horizontal base, but slopes in the North/South plane, you can put the incline here. If it is on a wall (vertical) put an incline of 90

Incline in degrees

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Declining

 
If your sundial base declines to the East or West (e.g. on a wall that isn't due South) you can put the declination here.

Declination:   °   WestEast

Calculate

Please note, hour lines are given from 4AM to 8PM, but not all of those may be visible in your situation (e.g a vertical dial)

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Print Table of Results

Print Angle Diagram

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Gnomon Diagram

Print Gnomon Diagram