Twin Calculators

Twin Calculators, which combines two calculators into one, and the calculation result can be copied and pasted between the two calculators with one click.


The two calculators are displayed side by side in landscape mode, and vertically in portrait mode.

In addition to separate calculations for each calculator, the calculation result can also be copied and pasted with one click, and other calculations can be performed during the calculation process, which is convenient for comparison and recording of results during calculations.


Calculation results can be imported from one calculator to another with one click:

When the ">>" key is pressed, the calculation result of the calculator on the left will be entered at the end of the formula on the calculator on the right.

When the "<<" key is pressed, the calculation result of the calculator on the right is entered at the end of the formula of the calculator on the left.

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Sun Position Calculator

Sun Position Calculator can calculates sun position (Solar Elevation Angle and Solar Azimuth Angle, etc.) for a given date and latitude/longitude.
Sunlight Times Calculator can calculate sun times for a given date, latitude/longitude, and the observer's height (in meters) relative to the horizon. It is an indispensable tool for anyone interested in understanding or predicting the exact times of sunrise and sunset for any location on Earth.

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Sunlight Times Calculator can calculate sun times for a given date, latitude/longitude, and the observer's height (in meters) relative to the horizon. It is an indispensable tool for anyone interested in understanding or predicting the exact times of sunrise and sunset for any location on Earth.
Moon Position Calculator can calculate moon position (altitude and azimuth, etc.) for a given date, time and latitude/longitude.

Moon Position Calculator

Moon Position Calculator can calculate moon position (altitude and azimuth, etc.) for a given date, time and latitude/longitude.
Moon Times Calculator is a geographic tool that can calculate the moon's rise and set times for a given date, latitude/longitude. The calculator provides detailed information about the moon's rise and set times and accounts for geographical latitude and longitude, as well as local time zones, ensuring highly accurate predictions.

Moon Times Calculator

Moon Times Calculator is a geographic tool that can calculate the moon's rise and set times for a given date, latitude/longitude. The calculator provides detailed information about the moon's rise and set times and accounts for geographical latitude and longitude, as well as local time zones, ensuring highly accurate predictions.